Communication method and communication apparatus

Abstract

Disclosed in the present application are a communication method and a communication apparatus. The present application is applicable to communication scenarios that support simultaneous data and power transfer. The method comprises: receiving a third signal, the third signal comprising a first OFDM symbol and a second OFDM symbol, the first OFDM symbol and the second OFDM symbol occupying a same time-frequency resource, the first OFDM symbol carrying a first modulation symbol block, and the second OFDM symbol carrying a second modulation symbol block, wherein the intersection of a set of subcarriers corresponding to modulation symbols in the first modulation symbol block and a set of subcarriers corresponding to modulation symbols in the second modulation symbol block is an empty set; performing power charging by using the third signal; and, on the basis of the third signal, obtaining a bit sequence. The present application can provide support for ensuring both the power charging efficiency and data demodulation performance while implementing simultaneous wireless power transfer and data transfer.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application with application number 202410093371.2 filed with the State Intellectual Property Office of China on January 22, 2024, and priority to the Chinese patent application with the invention name “Communication Method and Communication Device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a communication method and a communication device. Background Art

[0003] With the development of wireless networks and increasing business demands, a vast number of Internet of Things (IoT) devices are now present in these networks. These low-cost, small devices lack the ability to carry large-capacity batteries, resulting in short standby times. To address this issue, some have proposed using ambient energy harvesting to power IoT devices. Radio frequency energy is one potential energy source, offering advantages such as controllable energy levels and sources, as well as high penetration and long transmission distances.

[0004] Current RF energy harvesting solutions primarily focus on collecting radio electromagnetic waves present in the natural environment. However, due to a lack of matching and co-optimization of energy sources, the energy harvesting efficiency is very low and cannot meet the daily needs of IoT devices. Cellular mobile communication networks have a large number of base stations deployed. These base stations typically have multiple antennas that can transmit designed electromagnetic waves in different frequency bands and / or time periods and provide directional beams to enhance RF energy in certain directions, which can improve energy transmission efficiency to a certain extent. Therefore, wireless energy transfer (WPT) through base stations is one of the important ways to solve the short standby time of IoT devices in the future.

[0005] Cellular mobile communication network resources are limited. If a large amount of resources are used to charge IoT devices, the resources available for communication will be limited. If IoT devices can be charged while data is being transmitted to them, resource utilization can be improved. Therefore, it is necessary to research solutions for simultaneously charging IoT devices while data is being transmitted to them. Summary of the Invention

[0006] The embodiments of the present application disclose a communication method and a communication device in order to provide support for achieving the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance, so that it is possible to achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance.

[0007] In a first aspect, an embodiment of the present application provides a communication method, the method comprising: receiving a third signal, the third signal comprising a first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol, the first OFDM symbol and the second OFDM symbol occupying the same time-frequency resources, the first OFDM symbol carrying a first modulation symbol block, the second OFDM symbol carrying a second modulation symbol block, the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block being part of the subcarriers included in the time-frequency resources, the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block being part of the subcarriers included in the time-frequency resources, and the intersection of the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block being an empty set, the first modulation symbol block and the second modulation symbol block both carrying at least one of data information and control information; using the third signal for charging; obtaining a bit sequence based on the third signal, the bit sequence including the data information or control information carried by the first modulation symbol block. The third signal includes the first OFDM symbol and the second OFDM symbol, which can be replaced by: the third signal is obtained by multiple signals including the first signal and the second signal, which occupy the same time-frequency resources, sent by the transmitter; or the third signal is a signal received by the receiver after multiple signals including the first signal and the second signal, which occupy the same time-frequency resources, are transmitted through a channel, wherein the first signal carries the first OFDM symbol and the second signal carries the second OFDM symbol. The third signal can be obtained by superimposing two or more signals including the first signal and the second signal, which occupy the same time-frequency resources. These signals can be sent by the same transmitter through different physical antennas or virtual antennas, or by different transmitters, wherein the first signal carries the first OFDM symbol and the second signal carries the second OFDM symbol. The time-frequency resources occupied by the first OFDM symbol and the second OFDM symbol are the same, which can be replaced by: the time-frequency resources occupied by the first signal and the second signal are the same.

[0008] The time-frequency resources occupied by the first OFDM symbol and the second OFDM symbol are the same, and the time-frequency resources mapped by the first OFDM symbol and the second OFDM symbol may be the same. An OFDM symbol can be regarded as a symbol including N subcarriers on a time domain symbol, or as a time-frequency resource represented by N resource elements (RE) on a time domain symbol. Alternatively, an OFDM symbol is a frequency domain sequence on a time domain symbol, and the so-called frequency domain sequence may include different frequency components and the amplitude and / or phase contained in the frequency components.

[0009] In an embodiment of the present application, a third signal is used for charging, and a bit sequence is obtained based on the third signal; the coexistence of wireless energy transmission and data transmission can be achieved. Multiple signals (such as a first signal and a second signal) occupying the same time-frequency resources and having a low peak to average power ratio (PAPR) can be superimposed into a signal with a higher PAPR, such as a third signal, during transmission over a wireless channel (or in the air). Since the third signal is obtained based on the first signal and the second signal, the third signal can have a higher PAPR, and charging with the third signal can improve the charging efficiency. In the prior art, when a transmitter sends a signal with a higher PAPR, the efficiency of the power amplifier of its transmitter is reduced, and the signal quantization noise ratio of its digital-to-analog converter and analog-to-digital converter is also reduced, thereby deteriorating the data demodulation performance of the signal at the receiving end. In other words, the prior art cannot achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance. Since the third signal is obtained based on the first signal and the second signal, instead of the transmitter directly sending a signal with a higher PAPR, the third signal is used for charging, and a bit sequence is obtained based on the third signal; while achieving the coexistence of wireless energy transmission and data transmission, both charging efficiency and data demodulation performance can be taken into account.

[0010] In one possible implementation, the modulation symbol sequence corresponding to the first modulation symbol block and the modulation symbol sequence corresponding to the second modulation symbol block are both part of the first modulation symbol sequence, or the modulation symbol sequence corresponding to the first modulation symbol block and the modulation symbol sequence corresponding to the second modulation symbol block both correspond to a first logical channel or a physical channel.

[0011] In this implementation, the modulation symbol sequence corresponding to the first modulation symbol block and the modulation symbol sequence corresponding to the second modulation symbol block are both parts of the first modulation symbol sequence, which can improve the efficiency of transmitting the first modulation symbol sequence.

[0012] In one possible implementation, the bit sequence also includes data information or control information carried by the second modulation symbol block, and the bit sequence corresponding to the first modulation symbol block and the bit sequence corresponding to the second modulation symbol block are both part of the bit sequence.

[0013] In this implementation, the bit sequence corresponding to the first modulation symbol block and the bit sequence corresponding to the second modulation symbol block are both parts of the bit sequence, which can improve the efficiency of receiving the bit sequence.

[0014] In a possible implementation, the modulation symbol corresponding to the bit sequence is all or part of the modulation symbols carried by the subcarriers included in the time-frequency resources.

[0015] In one possible implementation, the PAPR of the third signal is higher than a preset threshold, i.e., a predefined threshold. Optionally, the PAPR of the first signal and the PAPR of the second signal are both lower than the preset threshold. The preset threshold can be adjusted according to actual needs to ensure signal charging efficiency.

[0016] In this implementation, the PAPR of the third signal is higher than the preset threshold, which can improve the charging efficiency of the third signal.

[0017] In a possible implementation, the first signal corresponds to a first spatial layer, the second signal corresponds to a second spatial layer, and the first spatial layer and the second spatial layer are different.

[0018] In a possible implementation, the bit sequence obtained based on the third signal includes: obtaining the bit sequence based on the position of the modulation symbols carried by the subcarriers included in the third signal and the time-frequency resources in the first modulation symbol sequence, and the modulation symbols carried by the subcarriers included in the time-frequency resources include the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block. The modulation symbols carried by the subcarriers included in the time-frequency resources may also include modulation symbols in other modulation symbol blocks, which is not limited in this application. In this application, a modulation symbol block includes one or more modulation symbols, and a modulation symbol sequence includes multiple modulation symbol blocks. For example, a modulation symbol sequence can be split into multiple modulation symbol blocks. In other words, multiple modulation symbol blocks can be combined into one modulation symbol sequence.

[0019] In this implementation, a bit sequence is obtained based on the position of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence; and the bit sequence corresponding to the first modulation symbol sequence can be accurately obtained.

[0020] In a possible implementation, the method further includes: receiving first information; and determining, based on the first information, a position of the modulation symbol carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence.

[0021] In this implementation, based on the first information, the position of the modulation symbol carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence is determined, so as to obtain a bit sequence based on the position of the modulation symbol carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence.

[0022] In one possible implementation, the first information includes a first index value, which is used to indicate the positions of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence; or, the first index value is used to indicate at least one of the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence.

[0023] In this implementation, the first information includes a first index value, which is used to indicate the position of the modulation symbol carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence, or at least one of the numbers of multiple first subcarriers carrying the modulation symbols in the first modulation symbol block in the subcarrier included in the time-frequency resource and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; signaling overhead can be saved.

[0024] In one possible implementation, the first information includes a first transmission parameter, and the first transmission parameter is used to determine at least one of the numbers of multiple first subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence.

[0025] In this implementation, the first transmission parameter is used to determine at least one of the numbers of multiple first subcarriers that carry modulation symbols in the first modulation symbol block included in the time-frequency resources and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; signaling overhead can be saved.

[0026] In one possible implementation, the first transmission parameter includes at least one of the number of the multiple first subcarriers and an order parameter, and the order parameter is used to determine the position of the modulation symbol in the first modulation symbol block in the first modulation symbol sequence.

[0027] In one possible implementation, the first transmission parameter also includes numbering information, and the numbering information and the number of the multiple first subcarriers are used to determine the numbers of the multiple first subcarriers that carry the modulation symbols in the first modulation symbol block in the subcarriers included in the time-frequency resources.

[0028] In this implementation, the numbering information and the number of multiple first subcarriers are used to determine the numbers of multiple first subcarriers that carry modulation symbols in the first modulation symbol block in the subcarriers included in the time-frequency resources, which can save signaling overhead.

[0029] In one possible implementation, the method further includes: receiving first indication information from a first transmitting end; based on the first indication information, determining the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence.

[0030] In one possible implementation, the method also includes: receiving first indication information from a first transmitting end; based on the first indication information, determining the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; receiving second indication information from a second transmitting end; based on the second indication information, determining the numbers of multiple second subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the second modulation symbol block and the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence.

[0031] In one possible implementation, the first indication information includes a second index value, and the second index value is used to indicate at least one of the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence.

[0032] In this implementation, the second index value included in the first information can save signaling overhead.

[0033] In one possible implementation, the first indication information includes a second transmission parameter, and the second transmission parameter is used to determine at least one of the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; the second transmission parameter includes at least one of the number of the multiple first subcarriers and an order parameter, and the order parameter is used to determine the position of the modulation symbols in the first modulation symbol block in the first modulation symbol sequence.

[0034] In this implementation, the second transmission parameter is used to determine at least one of the numbers of multiple first subcarriers carrying modulation symbols in the first modulation symbol block included in the time-frequency resources and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; signaling overhead can be saved.

[0035] In one possible implementation, the second indication information includes a third index value, and the third index value is used to indicate at least one of the numbers of multiple second subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the second modulation symbol block and the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence.

[0036] In this implementation, the third index value included in the first information can save signaling overhead.

[0037] In one possible implementation, the second indication information includes a third transmission parameter, and the third transmission parameter is used to determine at least one of the numbers of multiple second subcarriers included in the time-frequency resources that carry the modulation symbols in the second modulation symbol block and the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence; the third transmission parameter includes at least one of the number of the multiple second subcarriers and an order parameter, and the order parameter is used to determine the position of the modulation symbols in the second modulation symbol block in the first modulation symbol sequence.

[0038] In this implementation, the third transmission parameter is used to determine at least one of the numbers of multiple second subcarriers that carry modulation symbols in the second modulation symbol block in the subcarriers included in the time-frequency resources and the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence; signaling overhead can be saved.

[0039] In one possible implementation, obtaining the bit sequence based on the third signal includes: obtaining the bit sequence based on the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence, wherein the first modulation symbol block is obtained based on the first modulation symbol sequence.

[0040] In this implementation, the bit sequence corresponding to the first modulation symbol sequence can be accurately obtained.

[0041] In one possible implementation, before obtaining the bit sequence based on the numbers of multiple first subcarriers carrying the modulation symbols in the first modulation symbol block in the subcarriers included in the time-frequency resources and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence, the method also includes: receiving second information; and determining, based on the second information, the positions of the modulation symbols in the first modulation symbol block carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence.

[0042] In this implementation, based on the second information, the position of the modulation symbol in the first modulation symbol block carried by the subcarrier included in the time-frequency resource is determined in the first modulation symbol sequence, so as to obtain a bit sequence based on the position of the modulation symbol in the first modulation symbol block carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence.

[0043] In one possible implementation, the second information includes a second index value, which is used to indicate at least one of the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence.

[0044] In this implementation, the second index value included in the first information can save signaling overhead.

[0045] In one possible implementation, the second information includes a second transmission parameter, and the second transmission parameter is used to determine at least one of the numbers of multiple first subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; the second transmission parameter includes at least one of the number of the multiple first subcarriers and an order parameter, and the order parameter is used to determine the position of the modulation symbols in the first modulation symbol block in the first modulation symbol sequence.

[0046] In this implementation, the second transmission parameter is used to determine at least one of the numbers of multiple first subcarriers carrying modulation symbols in the first modulation symbol block included in the time-frequency resources and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; signaling overhead can be saved.

[0047] In second aspect, an embodiment of the present application provides a communication method, the method comprising: generating a first signal and a second signal, the first signal carrying a first OFDM symbol, the second signal carrying a second OFDM symbol, the time-frequency resources occupied by the first OFDM symbol and the second OFDM symbol being the same, the first OFDM symbol carrying a first modulation symbol block, the second OFDM symbol carrying a second modulation symbol block, the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block being part of the subcarriers included in the time-frequency resources, the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block being part of the subcarriers included in the time-frequency resources, and the intersection of the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block being an empty set, the first modulation symbol block and the second modulation symbol block both carrying at least one of data information and control information; sending the first signal and the second signal.

[0048] In an embodiment of the present application, the first OFDM symbol carried by the first signal and the second OFDM symbol carried by the second signal occupy the same time-frequency resources. After the first signal and the second signal are transmitted, the first signal and the second signal will be superimposed into a signal with a higher PAPR during transmission through the wireless channel (or in the air), which can improve the efficiency of the receiving end in charging the signal after the first signal and the second signal are transmitted through the wireless channel. In the prior art, when the transmitting end sends a signal with a higher PAPR, the efficiency of the power amplifier of its transmitter will be reduced, and the signal quantization noise ratio of its digital-to-analog converter and analog-to-digital converter will also be reduced, thereby causing the data demodulation performance of the signal at the receiving end to deteriorate. In other words, the prior art cannot achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance. Since the transmitted first signal and the second signal will be superimposed into a signal with a higher PAPR during transmission through the wireless channel, rather than directly sending a signal with a higher PAPR, that is, the PAPR of the first signal and the PAPR of the second signal are both low; it is possible to achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance.

[0049] In a possible implementation manner, the first signal and the second signal correspond to different radio frequency channels.

[0050] In this implementation, the first signal and the second signal correspond to different radio frequency channels, so that the signals of the radio frequency channel (or transmit channel), ie, the first signal and the second signal, have a lower PAPR.

[0051] In one possible implementation, the first signal corresponds to a first antenna port group, the second signal corresponds to a second antenna port group, the first antenna port group includes one or more first antenna ports, the second antenna port group includes one or more second antenna ports, and the first antenna port and the second antenna port are different. Antenna port groups and radio frequency channels may have a one-to-one correspondence.

[0052] Since the antenna port groups and RF channels correspond one-to-one, the first antenna port group and the second antenna port group correspond to different RF channels, supporting the signals of the RF channels, namely the first signal and the second signal, with a lower PAPR, thereby achieving the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance.

[0053] In a possible implementation, the first signal and the second signal are used for charging.

[0054] In one possible implementation, the PAPR of the first signal and the PAPR of the second signal are both lower than a preset threshold. The preset threshold can be set according to actual needs to prevent the transmitter from transmitting a signal with a high PAPR, thereby reducing the efficiency of its transmitter's power amplifier and adversely affecting the signal-to-quantization-noise ratio of its digital-to-analog converter and analog-to-digital converter.

[0055] In one possible implementation, a maximum of h subcarriers among the subcarriers included in the time-frequency resources carry the modulation symbols in the first modulation symbol block, h is equal to (n / m+r) or (n / m+r) rounded up, m is an integer greater than 1, m is less than or equal to the number of antenna port groups available for the time-frequency resources, r is an integer greater than or equal to 0, n is the total number of subcarriers included in the time-frequency resources, and the antenna port groups corresponding to the time-frequency resources include the first antenna port group and the second antenna port group.

[0056] In this implementation, a maximum of h subcarriers among the subcarriers included in the time-frequency resources carry modulation symbols in the first modulation symbol block, so that the subcarriers included in the time-frequency resources can carry modulation symbols of multiple modulation symbol blocks.

[0057] In one possible implementation, the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block are obtained based on the same bit sequence, or the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block are obtained based on bit sequences to be sent to different receiving ends.

[0058] In a possible implementation, the first OFDM symbol further carries a third modulation symbol block, and the third modulation symbol block and the first modulation symbol block are obtained based on bit sequences to be sent to different receiving ends.

[0059] In this implementation, the first OFDM symbol also carries a third modulation symbol block, which can improve resource utilization.

[0060] In one possible implementation, the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block are obtained based on the same bit sequence; the method also includes: sending first information, the first information is used to determine the position of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence, the modulation symbols carried by the subcarriers included in the time-frequency resources include the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block, and the first modulation symbol block and the second modulation symbol block are obtained based on the first modulation symbol sequence.

[0061] In this implementation, first information is sent so that the receiving end can determine the position of the modulation symbol carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence based on the first information.

[0062] In one possible implementation, the first information includes a first index value, which is used to indicate the positions of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence; or, the first index value is used to indicate at least one of the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence.

[0063] In this implementation, the first information includes a first index value, which is used to indicate the position of the modulation symbol carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence, or at least one of the numbers of multiple first subcarriers carrying the modulation symbols in the first modulation symbol block in the subcarrier included in the time-frequency resource and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; signaling overhead can be saved.

[0064] In one possible implementation, the first information includes a first transmission parameter, and the first transmission parameter is used to determine at least one of the numbers of multiple first subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence.

[0065] In this implementation, the first transmission parameter is used to determine at least one of the numbers of multiple first subcarriers that carry modulation symbols in the first modulation symbol block included in the time-frequency resources and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; signaling overhead can be saved.

[0066] In one possible implementation, the first transmission parameter includes at least one of the number of the multiple first subcarriers and an order parameter, and the order parameter is used to determine the position of the modulation symbol in the first modulation symbol block in the first modulation symbol sequence.

[0067] In one possible implementation, the first transmission parameter also includes numbering information, and the numbering information and the number of the multiple first subcarriers are used to determine the numbers of the multiple first subcarriers that carry the modulation symbols in the first modulation symbol block in the subcarriers included in the time-frequency resources.

[0068] In one possible implementation, the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block are obtained based on bit sequences to be sent to different receiving ends; the method also includes: sending second information, the second information is used to determine the position of the modulation symbols in the first modulation symbol block carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence, the first modulation symbol block is obtained based on the first modulation symbol sequence, and the first modulation symbol sequence is obtained based on the bit sequence to be sent to the first receiving end; sending third information, the third information is used to determine the position of the modulation symbols in the second modulation symbol block carried by the subcarriers included in the time-frequency resources in the second modulation symbol sequence, the second modulation symbol block is obtained based on the second modulation symbol sequence, the second modulation symbol sequence is obtained based on the bit sequence to be sent to the second receiving end, and the second receiving end is different from the first receiving end.

[0069] In this implementation, second information is sent so that the first receiving end can determine the position of the modulation symbol in the first modulation symbol block carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence based on the second information; third information is sent so that the second receiving end can determine the position of the modulation symbol in the second modulation symbol block carried by the subcarrier included in the time-frequency resource in the second modulation symbol sequence based on the third information.

[0070] In one possible implementation, the second information includes a second index value, which is used to indicate at least one of the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence.

[0071] In this implementation, the second information includes the second index value, which can save signaling overhead.

[0072] In one possible implementation, the second information includes a second transmission parameter, and the second transmission parameter is used to determine at least one of the numbers of multiple first subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; the second transmission parameter includes at least one of the number of the multiple first subcarriers and an order parameter, and the order parameter is used to determine the position of the modulation symbols in the first modulation symbol block in the first modulation symbol sequence.

[0073] In this implementation, the second information includes the second transmission parameter, which can save signaling overhead.

[0074] In one possible implementation, the method further includes: obtaining a first modulation symbol sequence; splitting the first modulation symbol sequence into v subsequences, where v is an integer greater than 1 and v is less than or equal to the number of antenna port groups available for the time-frequency resources, the v subsequences including a first subsequence and a second subsequence, the first subsequence corresponding to the first modulation symbol block, and the second subsequence corresponding to the second modulation symbol block; obtaining the first OFDM symbol based on the first modulation symbol block, and obtaining the second OFDM symbol based on the second modulation symbol block. Exemplarily, the first subsequence is the first modulation symbol block, and the second subsequence is the second modulation symbol block.

[0075] In this implementation, a first OFDM symbol is obtained based on the first modulation symbol block, and a second OFDM symbol is obtained based on the second modulation symbol block; so that the first OFDM symbol and the second OFDM symbol are respectively carried by the first signal and the second signal with lower PAPR, thereby avoiding directly sending a signal with higher PAPR.

[0076] In a possible implementation, splitting the first modulation symbol sequence into v subsequences includes: mapping the first modulation symbol sequence to v layers (spatial layers) to obtain the v subsequences, where the vector corresponding to the v layers is x(i)=[x (0) (i),…,x (v-1)(i)], M symb is the length of the first modulation symbol sequence (ie, the number of modulation symbols in the first modulation symbol sequence), v is an integer greater than 1, and the v layers correspond one-to-one to the v subsequences. (0) (i) is the modulation symbol of layer 0, x (v-1) (i) is the modulation symbol of the (v-1)th layer.

[0077] In this implementation, the first modulation symbol sequence is mapped to v layers so that different subsequences correspond to different layers.

[0078] In a possible implementation, the first modulation symbol sequence and the vector x(i) corresponding to the v layer satisfy the following first mapping rule:

[0079] Wherein, d(vk) represents the (vk)th modulation symbol in the first modulation symbol sequence, d(vk+1) represents the (vk+1)th modulation symbol in the first modulation symbol sequence, d(vk+v-1) represents the (vk+v-1)th modulation symbol in the first modulation symbol sequence, k is an integer greater than or equal to 0, and the value range of k is 0 to ((M symb / v)-1), the first mapping rule indicates that the (vk+j)th modulation symbol in the first modulation symbol sequence is mapped to the (vk+j)th symbol of the jth layer, where j is an integer greater than or equal to 0, and x (0) (vk) represents the (vk)th symbol of the 0th layer, corresponding to the (vk)th modulation symbol in the first modulation symbol sequence, x (1) (vk+1) represents the (vk+1)th symbol of the first layer, corresponding to the (vk+1)th modulation symbol in the first modulation symbol sequence, x (v-1) (vk+v-1) represents the (vk+v-1)th symbol of the (v-1)th layer, corresponding to the (vk+v-1)th modulation symbol in the first modulation symbol sequence.

[0080] In this implementation, the first modulation symbol sequence is mapped to the v layer using the first mapping rule described above, so that different subsequences correspond to different layers of different resources.

[0081] In one possible implementation, obtaining the first OFDM symbol based on the first modulation symbol block includes: mapping the modulation symbols in the first modulation symbol block (antenna port mapping) to the first antenna port group; mapping the modulation symbols corresponding to the first antenna port group in sequence (mapping to resource blocks) to multiple subcarriers of the first antenna port group to obtain the first OFDM symbol.

[0082] In this implementation, the modulation symbols in the first modulation symbol block corresponding to a certain spatial layer are mapped to the first antenna port group, that is, the modulation symbols of the same spatial layer are mapped to the same antenna port group, which can improve space utilization.

[0083] In a possible implementation, the obtaining of the first OFDM symbol based on the first modulation symbol block includes: converting the vector [x (0) (i),…,x (v-1) (i)] is mapped to v antenna port groups, and the vector [x (0) (i),…,x (v-1) (i)] The modulation symbols corresponding to the v antenna port groups satisfy the following second mapping rule:

[0084] Among them, x (0) (i) represents the i-th modulation symbol of layer 0, represents the i-th modulation symbol of antenna port group p0, x (v-1) (i) represents the i-th modulation symbol of the (v-1)-th layer, Indicates antenna port group p v-1 The second mapping rule indicates that the i-th modulation symbol of the s-th layer is mapped to the antenna port group p s On the i-th modulation symbol, s is greater than or equal to 0 and less than or equal to (v-1), {p0,…,p v-1} is the antenna port group set, Will total The symbols are sequentially mapped to the corresponding p-th antenna port group subcarriers to obtain the first OFDM symbol, where p is greater than or equal to 0 and less than or equal to (v-1).

[0085] In this implementation, different antenna port groups correspond to different layers, and different layers occupy different parts of the same time-frequency resources, so that signals sent by different antenna port groups occupy different parts of the same time-frequency resources.

[0086] In a possible implementation, the first modulation symbol sequence and the vector x(i) corresponding to the v layer satisfy the following third mapping rule:

[0087] Wherein, d(vi) represents the (vi)th modulation symbol in the first modulation symbol sequence, d(vi+1) represents the (vi+1)th modulation symbol in the first modulation symbol sequence, d(vi+v-1) represents the (vi+v-1)th modulation symbol in the first modulation symbol sequence, i is an integer greater than or equal to 0, and the value range of i is 0 to The third mapping rule indicates that the (vi+j)th modulation symbol in the first modulation symbol sequence is mapped to the i-th symbol of the j-th layer, where j is an integer greater than or equal to 0, and x (0) (i) represents the i-th symbol of layer 0, corresponding to the (vi)-th modulation symbol in the first modulation symbol sequence, x (v-1) (i) represents the i-th symbol of the (v-1)-th layer, corresponding to the (vi+v-1)-th modulation symbol in the first modulation symbol sequence.

[0088] In this implementation, modulation symbols exist in each spatial layer on the same time-frequency resources, which can improve the utilization rate of time-frequency resources.

[0089] In a possible implementation, the obtaining of the first OFDM symbol based on the first modulation symbol block includes: converting the vector [x (0) (i),…,x (v-1) (i)] is mapped to v antenna port groups, and the vector [x (0) (i),…,x (v-1) (i)] The modulation symbols corresponding to the v antenna port groups satisfy the following fourth mapping rule:

[0090] Among them, x (0) (i) represents the i-th modulation symbol of layer 0, represents the vith modulation symbol of antenna port group p0, x (v-1) (i) represents the i-th modulation symbol of the (v-1)-th layer, Indicates antenna port group p v-1 The (vi+v-1)th modulation symbol, i is an integer greater than or equal to 0, The fourth mapping rule indicates that the i-th modulation symbol of the s-th layer is mapped to the antenna port group p s On the (vi+s)th modulation symbol, s is greater than or equal to 0 and less than or equal to (v-1), {p0,…,p v-1} is the antenna port group set, Will total The symbols are sequentially mapped to the corresponding p-th antenna port group subcarriers to obtain the first OFDM symbol, where p is greater than or equal to 0 and less than or equal to (v-1).

[0091] In a possible implementation, the method further includes: sending fourth information, where the fourth information is used to determine a subcarrier set that carries the first modulation symbol block and the second modulation symbol block in the subcarriers included in the time-frequency resources.

[0092] In this implementation, the fourth information is sent to negotiate with other transmitting ends about which subcarriers in the time-frequency resources to occupy, so that the transmitting ends can occupy different subcarriers in the same time-frequency resources respectively.

[0093] In a third aspect, an embodiment of the present application provides a communication device having the function of implementing the behavior in the method embodiment of the first aspect above. The communication device can be a network device, or a component of a network device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can implement all or part of the functions of the network device. Alternatively, the communication device can be a terminal device, or a component of a terminal device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can implement all or part of the functions of the terminal device. The functions of the communication device can be implemented by hardware, or by hardware executing corresponding software implementations, and the hardware or software includes one or more modules or units corresponding to the above functions. In one possible implementation, the communication device includes a transceiver module and a processing module, wherein: the transceiver module is used to receive a third signal, the third signal including a first OFDM symbol and a second OFDM symbol, the first OFDM symbol and the second OFDM symbol occupy the same time-frequency resources, the first OFDM symbol carries a first modulation symbol block, the second OFDM symbol carries a second modulation symbol block, the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block is part of the subcarriers included in the time-frequency resources, the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is part of the subcarriers included in the time-frequency resources, and the intersection of the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is an empty set, and the first modulation symbol block and the second modulation symbol block both carry at least one of data information and control information; the processing module is used to use the third signal for charging; based on the third signal, obtain a bit sequence, the bit sequence including the data information or control information carried by the first modulation symbol block.

[0094] In one possible implementation, the processing module is specifically used to obtain the bit sequence based on the position of the modulation symbols carried by the subcarriers included in the third signal and the time-frequency resources in the first modulation symbol sequence, the modulation symbols carried by the subcarriers included in the time-frequency resources include the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block, and the first modulation symbol block and the second modulation symbol block are obtained based on the first modulation symbol sequence.

[0095] In one possible implementation, the transceiver module is further used to receive first information; the processing module is further used to determine the position of the modulation symbol carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence based on the first information.

[0096] In one possible implementation, the transceiver module is further used to receive first indication information from the first transmitting end; the processing module is further used to determine, based on the first indication information, the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence.

[0097] In one possible implementation, the transceiver module is further used to receive first indication information from a first transmitting end; the processing module is further used to determine, based on the first indication information, the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence; the transceiver module is also used to receive second indication information from a second transmitting end; the processing module is further used to determine, based on the second indication information, the numbers of multiple second subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the second modulation symbol block and the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence.

[0098] In one possible implementation, the processing module is specifically used to obtain the bit sequence based on the numbers of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence, and the first modulation symbol block is obtained based on the first modulation symbol sequence.

[0099] In one possible implementation, the transceiver module is further used to receive second information; the processing module is further used to determine, based on the second information, the position of the modulation symbols in the first modulation symbol block carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence.

[0100] For possible implementations of the communication device of the third aspect, reference may be made to various possible implementations of the first aspect.

[0101] For the technical effects brought about by various possible implementations of the third aspect, reference may be made to the introduction to the technical effects of various possible implementations of the first aspect.

[0102] In a fourth aspect, an embodiment of the present application provides a communication device having the function of implementing the behavior in the method embodiment of the second aspect above. The communication device can be a network device, or a component of a network device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can implement all or part of the functions of the network device. Alternatively, the communication device can be a terminal device, or a component of a terminal device (such as a processor, a chip, or a chip system, etc.), or a logic module or software that can implement all or part of the functions of the terminal device. The functions of the communication device can be implemented by hardware, or by hardware executing corresponding software implementations, and the hardware or software includes one or more modules or units corresponding to the above functions. In one possible implementation, the communication device includes a transceiver module and a processing module, wherein: the processing module is used to generate a first signal and a second signal, the first signal carries a first OFDM symbol, the second signal carries a second OFDM symbol, the first OFDM symbol and the second OFDM symbol occupy the same time-frequency resources, the first OFDM symbol carries a first modulation symbol block, the second OFDM symbol carries a second modulation symbol block, the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block is part of the subcarriers included in the time-frequency resources, the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is part of the subcarriers included in the time-frequency resources, and the intersection of the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is an empty set, and the first modulation symbol block and the second modulation symbol block both carry at least one of data information and control information; the transceiver module is used to send the first signal and the second signal.

[0103] In one possible implementation, the first signal corresponds to a first antenna port group, the second signal corresponds to a second antenna port group, the first antenna port group includes one or more first antenna ports, the second antenna port group includes one or more second antenna ports, and the first antenna port and the second antenna port are different.

[0104] In one possible implementation, the transceiver module is also used to send first information, and the first information is used to determine the position of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence. The modulation symbols carried by the subcarriers included in the time-frequency resources include the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block. The first modulation symbol block and the second modulation symbol block are obtained based on the first modulation symbol sequence.

[0105] In one possible implementation, the transceiver module is also used to send second information, where the second information is used to determine the position of the modulation symbol in the first modulation symbol block carried by the subcarrier included in the time-frequency resource in the first modulation symbol sequence, where the first modulation symbol block is obtained based on the first modulation symbol sequence, and the first modulation symbol sequence is obtained based on the bit sequence to be sent to the first receiving end; and send third information, where the third information is used to determine the position of the modulation symbol in the second modulation symbol block carried by the subcarrier included in the time-frequency resource in the second modulation symbol sequence, where the second modulation symbol block is obtained based on the second modulation symbol sequence, and the second modulation symbol sequence is obtained based on the bit sequence to be sent to the second receiving end, and the second receiving end is different from the first receiving end.

[0106] In one possible implementation, the processing module is further used to obtain a first modulation symbol sequence; split the first modulation symbol sequence into v subsequences, where v is an integer greater than 1, and v is less than or equal to the number of antenna port groups available for the time-frequency resources, and the v subsequences include a first subsequence and a second subsequence, the first subsequence corresponds to the first modulation symbol block, and the second subsequence corresponds to the second modulation symbol block; based on the first modulation symbol block, the first OFDM symbol is obtained, and based on the second modulation symbol block, the second OFDM symbol is obtained.

[0107] In a possible implementation, the transceiver module is further used to send fourth information, where the fourth information is used to determine a subcarrier set that carries the first modulation symbol block and the second modulation symbol block in the subcarriers included in the time-frequency resources.

[0108] Possible implementations of the communication device of the fourth aspect may refer to the various possible implementations of the second aspect.

[0109] For the technical effects brought about by various possible implementation methods of the fourth aspect, reference may be made to the introduction to the technical effects of various possible implementation methods of the second aspect.

[0110] In a fifth aspect, an embodiment of the present application provides another communication device, which includes one or more processors, and the one or more processors are used to process data and / or signaling so that the method in the first aspect or the second aspect mentioned above is implemented.

[0111] Optionally, the communication device further includes a memory storing a program or instruction. When the program or instruction is executed by the processor, the communication device performs the method described in the first or second aspect. Exemplarily, the communication device may be a chip, the processor may be a processing circuit in the chip, and the memory may be a random access memory or cache in the chip.

[0112] In the embodiment of the present application, during the execution of the above method, the process of sending information (or signals) in the above method can be understood as the process of outputting information based on the instructions of the processor. When outputting information, the processor outputs the information to the transceiver so that it can be transmitted by the transceiver. After being output by the processor, the information may undergo other processing before reaching the transceiver. Similarly, when the processor receives input information, the transceiver receives the information and inputs it into the processor. Furthermore, after the transceiver receives the information, the information may undergo other processing before being input into the processor.

[0113] For operations such as sending and / or receiving involved in the processor, unless otherwise specified, or unless they conflict with their actual functions or internal logic in the relevant descriptions, they can be generally understood as instructions output based on the processor.

[0114] During implementation, the processor may be a processor specifically configured to execute these methods, or may be a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor. For example, the processor may also be configured to execute a program stored in a memory. When the program is executed, the communication device performs the method described in the first aspect or any possible implementation of the first aspect.

[0115] In a possible implementation, the memory is located outside the communication device. In a possible implementation, the memory is located inside the communication device.

[0116] In a possible implementation, the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.

[0117] In a possible implementation, the communication device further includes a transceiver, and the transceiver is configured to receive signals or send signals.

[0118] In a sixth aspect, the present application provides another communication device, which includes a processing circuit and an interface circuit, wherein the interface circuit is used to acquire a signal or output a signal; and the processing circuit is used to execute the method shown in the first aspect or the second aspect above.

[0119] In a seventh aspect, the present application provides a computer-readable storage medium, which stores a computer program. The computer program includes program instructions, which, when executed, enable the computer to execute the method shown in the first aspect or the second aspect above.

[0120] In an eighth aspect, the present application provides a computer program product, which includes a computer program, and the computer program includes program instructions. When the program instructions are executed, the computer executes the method shown in the first aspect or the second aspect above.

[0121] In the ninth aspect, the present application provides a chip comprising a communication interface and a processor; the communication interface is used for transmitting and receiving signals of the chip; the processor is used for executing computer program instructions so that a communication device including the chip performs the method shown in the first aspect or the second aspect above.

[0122] In the tenth aspect, an embodiment of the present application provides a communication system, comprising a communication device for implementing the third aspect or any possible implementation of the third aspect, and a communication device for implementing the fourth aspect or any possible implementation of the fourth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0123] FIG1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0124] FIG2 is a schematic diagram of a possible application framework in a communication system;

[0125] FIG3 is a schematic diagram of an energy harvesting circuit provided in an embodiment of the present application;

[0126] FIG4 is a flow chart of a communication method provided in an embodiment of the present application;

[0127] FIG5 is an example of a set of subcarriers corresponding to four OFDM subcarriers provided in an embodiment of the present application;

[0128] FIG6 is a flow chart of another communication method provided in an embodiment of the present application;

[0129] FIG7A is an example of frequency domain resources occupied by four groups of subcarriers respectively included in the time-frequency resources occupied by a group of simultaneous digital transmission signals sent by a transmitting end according to an embodiment of the present application;

[0130] FIG7B is another example of the frequency domain resources occupied by four groups of subcarriers respectively included in the time-frequency resources occupied by a group of simultaneous digital transmission signals sent by a transmitting end provided by an embodiment of the present application;

[0131] FIG7C is another example of the frequency domain resources occupied by four groups of subcarriers respectively included in the time-frequency resources occupied by a group of simultaneous digital transmission signals sent by a transmitting end provided by an embodiment of the present application;

[0132] FIG7D is another example of the frequency domain resources occupied by four groups of subcarriers respectively included in the time-frequency resources occupied by the transmitting end for sending a group of simultaneous digital transmission signals provided by an embodiment of the present application;

[0133] FIG8 is a flow chart of another communication method provided in an embodiment of the present application;

[0134] FIG9A is a diagram illustrating an example of a process in which a transmitting end generates and sends a set of simultaneous digital transmission signals according to an embodiment of the present application;

[0135] FIG9B is a schematic diagram of a process of symbol mapping and OFDM symbol generation provided in an embodiment of the present application;

[0136] FIG10 is a flow chart of another communication method provided in an embodiment of the present application;

[0137] FIG11 is a flow chart of another communication method provided in an embodiment of the present application;

[0138] FIG12 is a flow chart of another communication method provided in an embodiment of the present application;

[0139] FIG13 is a flow chart of another communication method provided in an embodiment of the present application;

[0140] FIG14 is a flow chart of another communication method provided in an embodiment of the present application;

[0141] FIG15 is a flow chart of another communication method provided in an embodiment of the present application;

[0142] FIG16 is a flow chart of another communication method provided in an embodiment of the present application;

[0143] FIG17 is a schematic structural diagram of a communication device 1700 provided in an embodiment of the present application;

[0144] FIG18 is a schematic structural diagram of another device 180 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0145] The terms "first" and "second" in the specification, claims and drawings of the present application are only used to distinguish different objects, rather than to describe a specific order. It will be understood that the various digital numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of each of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and inherent logic. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0146] In the embodiments of the present application, the term "wireless communication" can be simply referred to as "communication", and the term "communication" can also be described as "data transmission", "information transmission", or "information interaction". The term "wireless charging" can also be simply referred to as "charging", "energy transmission", or "charging". The term "charging" can also be described as "wireless energy transmission", "wireless charging", "wireless energy transmission", "radio frequency energy transmission", "radio frequency energy transmission", "radio frequency charging", or "radio frequency charging".

[0147] The "embodiment" mentioned in this document means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments. In this application, the naming of messages is only used to distinguish different messages and should not be understood as a limitation. In other words, the name of any message in this application can be replaced with other names, and this application is not limited.

[0148] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification of the present application and the appended claims, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include plural expressions, unless there is a clear contrary indication in the context. It should also be understood that the term "and / or" used in the present application refers to and includes any or all possible combinations of one or more listed items. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The term "multiple" used in the present application refers to two or more. In the textual description of the present application, the character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0149] It is understood that in each embodiment of the present application, "A corresponds to B" means that there is a corresponding relationship between A and B, and B can be determined according to A. However, it should also be understood that determining (or generating) B according to (or based on) A does not mean that B is determined (or generated) only according to (or based on) A, and B can also be determined (or generated) according to (or based on) A and / or other information.

[0150] It should be understood that, in this application, indication includes direct indication (also known as explicit indication) and implicit indication. Direct indication of information A refers to including information A; implicit indication of information A refers to indicating information A through the correspondence between information A and information B and the direct indication of information B. The correspondence between information A and information B can be predefined, pre-stored, pre-burned, or pre-configured.

[0151] It should be understood that, in this application, information C is used to determine information D, which includes both information D being determined solely based on information C and information D being determined based on information C and other information. Furthermore, information C can also be used to determine information D indirectly, for example, where information D is determined based on information E, and information E is determined based on information C.

[0152] In addition, in each embodiment of the present application, "network element A sends information A to network element B" can be understood as the destination end of the information A or the intermediate network element in the transmission path between the destination end and the network element B, which may include directly or indirectly sending information to network element B. "Network element B receives information A from network element A" can be understood as the source end of the information A or the intermediate network element in the transmission path between the source end and the network element A, which may include directly or indirectly receiving information from network element A. The information may be processed as necessary between the source end and the destination end of the information transmission, such as format changes, but the destination end can understand the valid information from the source end. Similar expressions in this application can be understood similarly and will not be elaborated here.

[0153] As mentioned in the background technology section, if IoT devices can be charged while data is being transmitted to them, resource utilization can be improved. Therefore, research is needed to investigate how to simultaneously charge IoT devices while data is being transmitted to them. Alternatively, research is needed to investigate how to transmit data to IoT devices while charging them.

[0154] The present application provides a technical solution for simultaneously charging an IoT device (which may be another rechargeable device) while transmitting data to the IoT device using simultaneous wireless information and power transfer (SWIPT) technology. SWIPT technology refers to a technology that utilizes the characteristic of wireless radio frequency signals that can carry information and energy at the same time to simultaneously receive information and energy from a radio frequency signal. Wireless simultaneous information and power transfer can also be described as "simultaneous transmission of data and energy", "transmitting energy with information", "transmitting energy with information", "integrated transmission of data and energy", "integrated transmission of energy and data", or "cooperative transmission of wireless data and energy", etc., which is not limited in the present application. The technical solution provided in the present application can be applied to wireless communication / charging between communication devices. Wireless communication / charging between communication devices may include: wireless communication / charging between network devices and terminal devices, wireless communication / charging between network devices and network devices, and wireless communication / charging between terminal devices and terminal devices.

[0155] The following first introduces the application scenarios of the technical solution of this application.

[0156] The application scenarios of the technical solution of the present application include but are not limited to: wireless data transmission between network devices (such as base stations or access points) and terminal devices, wireless data transmission between network devices, wireless data transmission between terminal devices, wireless data transmission between network devices and relay devices, wireless data transmission between relay devices and relay devices, or wireless data transmission between relay devices and terminal devices. The present application describes the wireless data transmission between network devices and terminal devices as an example. The wireless data transmission between other devices can refer to the wireless data transmission between network devices and terminal devices. The wireless data transmission between network devices and terminal devices includes but is not limited to: the network device sends a radio frequency signal carrying information and energy to the terminal device, the network device sends a radio frequency signal carrying information and energy to the terminal device through a relay device, the same radio frequency signal carrying information and energy sent by the network device is used for multiple terminal devices to obtain data and charge, multiple network devices send radio frequency signals carrying information and energy to one or more terminal devices at the same time, or the terminal device sends a radio frequency signal carrying information and energy to the network device (such as an access point).

[0157] The technical solution of the present application can be applied to a variety of communication scenarios. Figure 1 is a schematic diagram of an application scenario provided by an embodiment of the present application. As shown in Figure 1, the application scenarios of the technical solution of the present application may include: direct communication between network equipment and user equipment (UE) (i.e., a point-to-point single connection between the network device and the UE), multi-hop / multi-relay transmission between the network device and the UE (i.e., multi-hop single connection), dual connectivity (dual connectivity, DC) of multiple network devices and UE, or multi-hop multi-connection and other scenarios. Figure 1 is only exemplary and does not impose any restrictions on the network architecture applicable to the present application. Simultaneous wireless data transmission between any two devices is a network architecture available for the present application.

[0158] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, wireless local area networks (WLAN) systems, satellite communication systems, future communication systems, such as sixth generation (6G) mobile communication systems, or a fusion system of multiple systems. The technical solutions provided in this application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems.

[0159] In this application, the technical solution of this application is described by taking the cellular system related to the 3rd Generation Partnership Project (3GPP) as an example, but this should not constitute any limitation to this application. Based on the same concept, the technical method of this application can also be applied to other communication networks such as ZigBee, long range radio (Lora), Bluetooth (BT), and wireless fidelity (Wi-Fi). The technical solution provided in the embodiment of this application is also applicable to other communication systems that support simultaneous transmission of wireless data and energy. The above-mentioned communication system to which the technical solution provided in the embodiment of this application is applicable is only an example, and the communication system to which the technical solution provided in this application is applicable is not limited thereto. They are uniformly described here and will not be repeated below.

[0160] A first device in a communication system can send a signal to a second device or receive a signal from a third device. The signal may include information, signaling, or data, etc. The device may also be replaced by an entity, a network entity, a communication device, a communication module, a node, a communication node, etc. The present disclosure uses a network element as an example for description. The first device may be a network device or a terminal device, the second device may be a network device or a terminal device, and the third device may be a network device or a terminal device. For example, the communication system may include at least one terminal device and at least one network device. The network device may send a downlink signal to the terminal device, and / or the terminal device may send an uplink signal to the network device. It is understandable that the terminal device in the present disclosure may be replaced by the first device, and the network device may be replaced by the second device, and both perform the corresponding communication method in the present disclosure.

[0161] In the embodiments of the present application, terminal equipment may also be referred to as user equipment (UE), access terminal, subscriber unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.

[0162] The terminal device may be a device that provides wireless communication functions, such as a handheld device or a vehicle-mounted device with a wireless connection function. At present, some examples of terminal devices are: mobile phones, cellular phones, smart phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (PLMNs). The terminal device may also be a device in a ZigBee network, a device in a Lora network, a Bluetooth slave (BT slave), a Bluetooth low energy (BLE slave), a Wi-Fi station (STA), etc.

[0163] As an example and not a limitation, in the embodiments of the present application, the terminal device may also be a terminal device in an IoT system, and may also be referred to as an IoT node. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection. The connection can be through broadband technology or narrowband technology. IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrowband (NB) technology. IoT technology may include reflective communication technology, spread spectrum technology, ultra wide band (UWB), etc., which will not be repeated here.

[0164] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0165] In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system, which can be installed in the terminal device or used in combination with the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the embodiments of the present application, only the terminal device is used as an example for description, and the embodiments of the present application are not limited to the solutions of the embodiments of the present application.

[0166] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. The term "base station" may broadly cover the following names or be replaced with the following names, such as RAN node, NodeB, evolved NodeB (eNB), next generation NodeB (gNB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home NodeB, HNB), baseband unit (BBU), wireless relay node, wireless backhaul node, relay station, transmitting and receiving point (TRP), IAB node, transmitting point (TP), master station, auxiliary station, multi-standard radio (motor slide retainer, MSR) node, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CNU), etc. unit, CU), distributed unit (distributed unit, DU), radio unit (radio unit, RU), positioning node, one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, etc. The network device in the embodiment of the present application may also be a ZigBee base station, a master Bluetooth (BT master), a master BLE (BLE master), a Lora base station, or a Wi-Fi access point.

[0167] The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, a modem or a chip used to be set in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs the base station function in device to device (D2D), vehicle to everything (V2X), and machine to machine (M2M) communications, a network side device in a 6G network, and a device that performs the base station function in future communication systems. The base station can support networks with the same or different access technologies. Optionally, the RAN node can also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the V2X technology can be a road side unit (RSU). The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.

[0168] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0169] In some deployments, the network devices mentioned in the embodiments of the present application may include a CU, a DU, or both a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)), a user plane CU node (central unit-user plane (CU-UP)), and a DU node. For example, the network devices may include a gNB-CU-CP, a gNB-CU-UP, and a gNB-DU.

[0170] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes implementing portions of the base station's functionality. For example, a RAN node can be a CU, DU, CU-CP, CU-UP, or RU. The CU and DU can be separate or included in the same network element, such as the BBU. The RU can be included in radio frequency equipment, such as the RRU, AAU, or RRH.

[0171] The RAN node may support one or more types of fronthaul interfaces, with different fronthaul interfaces corresponding to DUs and RUs with different functions. If the fronthaul interface between the DU and the RU is a common public radio interface (CPRI), the DU is configured to implement one or more baseband functions, and the RU is configured to implement one or more radio frequency functions. If the fronthaul interface between the DU and the RU is another type of interface, relative to the CPRI, some of the downlink and / or uplink baseband functions, such as precoding, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) for downlink, are moved from the DU to the RU for implementation; and for uplink, one or more of digital beamforming (BF), or fast Fourier transform (FFT) / cyclic prefix (CP) removal, are moved from the DU to the RU for implementation. In one possible implementation, the interface may be an enhanced common public radio interface (eCPRI). In the eCPRI architecture, the division between the DU and RU is different, corresponding to different types (Categories) of eCPRI, such as eCPRI Cat A, B, C, D, E, and F.

[0172] Taking eCPRI Cat A as an example, for downlink transmission, based on layer mapping, the DU is configured to implement layer mapping and one or more functions preceding it (i.e., one or more of coding, rate matching, scrambling, modulation, and layer mapping). Other functions after layer mapping (e.g., resource element (RE) mapping, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) addition) are moved to the RU for implementation. For uplink transmission, based on RE demapping, the DU is configured to implement demapping and one or more functions preceding it (i.e., one or more of decoding, rate matching, descrambling, demodulation, inverse discrete Fourier transform (IDFT), channel equalization, and RE demapping). Other functions after demapping (e.g., one or more of digital BF or fast Fourier transform (FFT) / CP removal) are moved to the RU for implementation. It is understandable that for the functional description of DU and RU corresponding to various types of eCPRI, reference can be made to the eCPRI protocol, which will not be described in detail here.

[0173] In one possible design, the processing unit for implementing baseband functions in the BBU is called a baseband high layer (BBH) unit, and the processing unit for implementing baseband functions in the RRU / AAU / RRH is called a baseband low layer (BBL) unit.

[0174] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (ORAN / O-RAN) system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. Any unit in the CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0175] In the embodiments of the present application, the device for implementing the functions of the network device can be a network device; it can also be a device that can support the network device to implement the functions, such as a chip system, a hardware circuit, a software module, or a hardware circuit and a software module. The device can be installed in the network device or used in conjunction with the network device. In the embodiments of the present application, only the device for implementing the functions of the network device is used as an example to illustrate, and does not constitute a limitation on the solutions of the embodiments of the present application.

[0176] The network device and / or terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on the water surface; it can also be deployed on aircraft, balloons and satellites in the air. The embodiments of this application do not limit the scenarios in which the network device and the terminal device are located. In addition, the terminal device and the network device can be hardware devices, or they can be software functions running on dedicated hardware, software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities including dedicated or general-purpose hardware devices and software functions. This application does not limit the specific forms of the terminal device and the network device.

[0177] It should be noted that the network architecture described in the embodiment of the present application is to more clearly illustrate the technical solutions of the embodiment of the present application, and does not constitute a limitation on the technical solutions provided in the embodiment of the present application. Those skilled in the art will appreciate that, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiment of the present application are equally applicable to similar technical problems. In the following embodiments, the technical solutions provided in the embodiment of the present application are described by taking the device for implementing the functions of the network device as a network device and the network device as a base station as an example.

[0178] Figure 2 is a schematic diagram of a possible application framework in a communication system. As shown in Figure 2, the communication system includes: core network equipment, access network nodes, operation administration and maintenance (OAM) network elements, and terminal equipment. In this communication system, network elements are connected via interfaces (e.g., NG, Xn) or air interfaces. The access network node can be a single RAN node or can include multiple RAN nodes, for example, including a CU and a DU. Optionally, the CU can also be split into a CU-CP and a CU-UP.

[0179] It is understandable that this application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application. As long as it is possible to perform wireless data transmission according to the method provided in the embodiment of the present application by running a program that records the code of the method provided in the embodiment of the present application. The method provided in the embodiment of the present application can be applied to wireless data transmission between a terminal device and a network device. The following is an example of the interaction between a terminal device and a network device (taking a base station as an example) for explanation.

[0180] The principle of the currently used digital and energy simultaneous transmission scheme is: the transmitting end sends a radio frequency signal carrying information and energy, the receiving end obtains the information carried by the radio frequency signal, and absorbs the energy carried by the radio frequency signal through an energy harvesting circuit for charging. Figure 3 is a schematic diagram of an energy harvesting circuit provided in an embodiment of the present application. As shown in Figure 3, the energy harvesting circuit includes a rectifier module, a power management module, and a rechargeable battery. Among them, the power management module is used to manage the battery, for example, to charge the rechargeable battery; the rectifier module mainly includes a diode. Under a given turn-on voltage, the diode in the rectifier module can absorb more energy from a radio frequency signal with a high PAPR (above a certain threshold) to improve the charging efficiency. Therefore, the PAPR of the radio frequency signal will affect the charging efficiency. Generally, a radio frequency signal with a high PAPR is required to obtain a high (above a certain threshold) charging efficiency. To improve the charging efficiency, an existing digital and energy simultaneous transmission scheme is that the base station generates a radio frequency signal (or digital and energy simultaneous transmission waveform) that meets the PAPR constraint (i.e., the PAPR is above a certain threshold) by controlling the modulation mode and other means.

[0181] However, although the radio frequency signal with high PAPR has additional gain for charging, it is an unfavorable factor for data transmission. The generation and transmission of radio frequency signals with high PAPR by the transmitting end (such as a base station) will reduce the efficiency of the power amplifier of the transmitter of the transmitting end, and will also reduce the signal quantization noise ratio of its digital / analog converter and analog / digital converter, thereby causing the data demodulation performance of the signal at the receiving end to deteriorate. In other words, the existing technology cannot achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance. The technical solution of the present application is intended to achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance. In other words, the digital and energy simultaneous transmission solution provided by the present application can take into account both charging efficiency and data demodulation performance.

[0182] One possible implementation of the technical solution of the present application is as follows: a transmitting end (e.g., a base station) transmits multiple low-PAPR (lower than a certain threshold) radio frequency signals through multiple antenna port groups. The multiple low-PAPR radio frequency signals occupy the same time-frequency resources and are superimposed into a signal with a higher PAPR (higher than a certain threshold) during wireless channel transmission (or in the air). One or more receiving ends (e.g., terminal devices) receive the higher PAPR signal. Another possible implementation of the technical solution of the present application is as follows: multiple transmitting ends (e.g., two base stations) respectively transmit one or more low-PAPR radio frequency signals to the same receiving end through one or more antenna port groups. The multiple low-PAPR radio frequency signals transmitted by the multiple transmitting ends occupy the same time-frequency resources and are superimposed into a signal with a higher PAPR during wireless channel transmission (or in the air). The receiving end (e.g., terminal device) receives the higher PAPR signal. Since the transmitter sends a low PAPR radio frequency signal instead of directly sending a high PAPR radio frequency signal, it will not affect the efficiency of its transmitter's power amplifier, nor will it cause a decrease in the signal quantization noise ratio of its digital / analog converter and analog / digital converter, thereby avoiding the receiver's adverse impact on the data demodulation performance of the received signal. The receiver receives a signal with a high PAPR, and the energy charging efficiency of the receiver is high. Therefore, the technical solution of the present application can achieve the coexistence of wireless energy transmission and data transmission while taking into account both energy charging efficiency and data demodulation performance. The technical solution of the present application is described below in conjunction with the accompanying drawings.

[0183] FIG4 is a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG4 , the method includes:

[0184] 401. A transmitting end generates a first signal and a second signal.

[0185] In the present application, the transmitting end may be a network device or a UE. In one possible implementation, the transmitting end is a base station and the receiving end is a UE. In one possible implementation, the transmitting end and the receiving end are different UEs. In one possible implementation, the transmitting end is a UE and the receiving end is a base station. The above-mentioned first signal carries a first OFDM symbol, and the above-mentioned second signal carries a second OFDM symbol. The time-frequency resources occupied by the above-mentioned first OFDM symbol and the above-mentioned second OFDM symbol are the same. The resources occupied by an OFDM symbol refer to the resources mapped by the OFDM symbol, such as the subcarriers mapped to the modulation symbols carried by the OFDM symbol, time-frequency resources, or one or more REs. In other words, the time-frequency resources occupied by the first signal and the second signal are the same. The above-mentioned first OFDM symbol carries a first modulation symbol block, and the above-mentioned second OFDM symbol carries a second modulation symbol block. In the present application, any modulation symbol block includes one or more modulation symbols. The intersection of the set of subcarriers corresponding to the modulation symbols in the above-mentioned first modulation symbol block and the set of subcarriers corresponding to the modulation symbols in the above-mentioned second modulation symbol block is an empty set. Exemplarily, the time-frequency resources occupied by the first signal and the second signal include 1024 subcarriers, namely, subcarrier #0 to subcarrier #1023. The set of subcarriers corresponding to the modulation symbols in the first modulation symbol block is subcarrier #0 to subcarrier #511, i.e., subcarriers #0 to subcarrier #511 carry the modulation symbols in the first modulation symbol block, and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is subcarrier #512 to subcarrier #1023, i.e., subcarriers #512 to subcarrier #1023 carry the modulation symbols in the second modulation symbol block. Exemplarily, the time-frequency resources occupied by the first signal and the second signal include 1024 subcarriers, namely, subcarrier #0 to subcarrier #1023. The set of subcarriers corresponding to the modulation symbols in the first modulation symbol block is subcarrier #0 to subcarrier #255, and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is subcarrier #512 to subcarrier #767. Both the first modulation symbol block and the second modulation symbol block carry at least one of data information and control information. In other words, both the first signal and the second signal carry at least one of data information and control information. Neither the first signal nor the second signal is a reference signal.

[0186] In one possible implementation, the first signal and the second signal are used for charging. Exemplarily, both the first signal and the second signal are radio frequency signals carrying control information and energy. Exemplarily, both the first signal and the second signal are radio frequency signals carrying data information and energy. Exemplarily, one of the first signal and the second signal is a radio frequency signal carrying control information and energy, and the other is a radio frequency signal carrying data information and energy. Exemplarily, one of the first signal and the second signal is a radio frequency signal carrying control information or data information, as well as energy, and the other is a radio frequency signal carrying only energy. Exemplarily, both the first signal and the second signal are radio frequency signals carrying data information, control information, and energy. In one possible implementation, the PAPR of the first signal and the PAPR of the second signal are both lower than a preset threshold. The preset threshold can be set according to actual needs to prevent the transmitter from transmitting a signal with a high PAPR, which could reduce the efficiency of its transmitter's power amplifier and adversely affect the signal-to-quantization-to-noise ratio of its digital-to-analog converter and analog-to-digital converter.

[0187] In one possible implementation, a maximum of h subcarriers among the subcarriers included in the above-mentioned time-frequency resources carry the modulation symbols in the above-mentioned first modulation symbol block, h is equal to (n / m+r) or (n / m+r) rounded up, m is an integer greater than 1, m is less than or equal to the number of antenna port groups available for the above-mentioned time-frequency resources, r is an integer greater than or equal to 0, n is the total number of subcarriers included in the above-mentioned time-frequency resources, and the antenna port groups corresponding to the above-mentioned time-frequency resources include the above-mentioned first antenna port group and the above-mentioned second antenna port group. The above-mentioned time-frequency resources are time-frequency resources that the transmitting end can use to send the first signal and the second signal. The frequency domain resources in the above-mentioned time-frequency resources can be continuous or non-continuous. r can be predefined, for example, r is 1, 2, 5, etc. When the subcarriers included in the above-mentioned time-frequency resources are divided into w groups (for example, one group of subcarriers is the subcarriers among the subcarriers included in the above-mentioned time-frequency resources that carry the modulation symbols in the above-mentioned first modulation symbol block) and the number of subcarriers in each group is the same, r is equal to 0, and h is equal to (n / m) or (n / m) rounded up. w is an integer greater than 1. When the subcarriers included in the above-mentioned time-frequency resources are divided into w groups and the number of subcarriers in at least two groups of subcarriers in the w groups is different, r is greater than 0, and h is equal to (n / m+r) or (n / m+r) rounded up. In this implementation, a maximum of h subcarriers among the subcarriers included in the time-frequency resources carry the modulation symbols in the first modulation symbol block, so that the subcarriers included in the time-frequency resources can carry the modulation symbols of multiple modulation symbol blocks.

[0188] 402. The transmitting end sends a first signal and a second signal.

[0189] Correspondingly, one or more receiving ends receive a third signal. The third signal is obtained based on the first signal and the second signal. In other words, the third signal is a signal received by the receiving end after a plurality of signals including the first signal and the second signal, which occupy the same time-frequency resource and are sent by the transmitting end, are transmitted through the channel. For example, the transmitting end sends a first signal through its first antenna port and a second signal through its second antenna port. The first signal and the second signal are superimposed (or coupled) into a third signal during transmission through the wireless channel (or in the air). The receiving end receives the third signal. The third signal is a signal received by the receiving end after the first signal and the second signal are transmitted through the wireless channel. In one possible implementation, the first signal and the second signal correspond to information of the same logical channel or physical channel, such as both are information of a physical downlink shared channel (PDSCH). In other words, the modulation symbol sequence corresponding to the first modulation symbol block and the modulation symbol sequence corresponding to the second modulation symbol block correspond to information of the first logical channel or physical channel, such as both are information of PDSCH.

[0190] In one possible implementation, the first signal and the second signal correspond to different radio frequency channels. In this implementation, the first signal and the second signal correspond to different radio frequency channels so that the signals of the radio frequency channels at the transmitting end, i.e., the first signal and the second signal, have a lower PAPR.

[0191] In one possible implementation, the first signal corresponds to a first antenna port group, the second signal corresponds to a second antenna port group, the first antenna port group includes one or more first antenna ports, the second antenna port group includes one or more second antenna ports, and the first antenna port and the second antenna port are different. In one possible implementation, different antenna port groups correspond to different physical antennas; further, different antenna port groups correspond to different radio frequency channels. In one possible implementation, when a physical antenna corresponds to two or more radio frequency channels, different antenna port groups correspond to the same physical antenna, and different antenna port groups correspond to different radio frequency channels of the same physical antenna. The first antenna port group and the second antenna port group correspond to different radio frequency channels to support the signals of the radio frequency channels, i.e., the first signal and the second signal, with a lower PAPR, thereby achieving coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance.

[0192] In one possible implementation, a transmitter transmits a first signal through a first antenna port group and a second signal through a second antenna port group. The first signal and the second signal are transmitted through different spatial layers, and the first antenna port group and the second antenna port group correspond to different spatial layers. Exemplarily, the modulation symbols in the first modulation symbol block are modulation symbols mapped to the first spatial layer, and the modulation symbols in the second modulation symbol block are modulation symbols mapped to the second spatial layer. The transmitter transmits the first signal through the first spatial layer and the second signal through the second spatial layer. In one possible implementation, the transmitter transmits the first signal through the first antenna port group and the second signal through the second antenna port group. The first signal and the second signal are transmitted through the same spatial layer, and the first antenna port group and the second antenna port group correspond to the same spatial layer. Exemplarily, the transmitter splits the first modulation symbol sequence to obtain a first modulation symbol block and a second modulation symbol block; generates a first signal based on the first modulation symbol block and a second signal based on the second modulation symbol block; and transmits the first signal and the second signal. The transmitter does not need to perform layer mapping during the generation and transmission of the first and second signals.

[0193] Steps 401 to 402 can be an example of a transmitter generating and sending v low PAPR signals, that is, an example of generating and sending v signals whose PAPR is lower than a preset threshold, where v is an integer greater than 1. For example, v is 2, 3, 4, 5, 6, 8, 9, 10, 12, 16, etc., which is not limited in this application. The above-mentioned third signal can be obtained by superimposing the v low PAPR signals sent by the transmitter during transmission over a wireless channel (or in the air). In one possible implementation, v is less than or equal to the number of antenna port groups available to the transmitter, that is, the number of antenna port groups available for the above-mentioned time-frequency resources. In one possible implementation, v is less than or equal to the number of RF channels of the transmitter. An example of a transmitter generating and sending four low PAPR signals is: the transmitter generates a first signal, a second signal, signal #3 and signal #4, the first signal carries OFDM symbol #1 (first OFDM symbol), the second signal carries OFDM symbol #2 (second OFDM symbol), signal #3 carries OFDM symbol #3, and signal #4 carries OFDM symbol #4, OFDM symbol #1, OFDM symbol #2, OFDM symbol #3 and OFDM symbol #4 occupy the same time-frequency resources, OFDM symbol #1 carries modulation symbol block #1 (i.e., first modulation symbol block), OFDM symbol #2 carries modulation symbol block #2 (i.e., second modulation symbol block), OFDM symbol #3 carries modulation symbol block #3, and OFDM symbol #4 carries modulation symbol block #4, and the intersection of the sets of any two corresponding subcarriers in modulation symbol block #1, modulation symbol block #2, modulation symbol block #3 and modulation symbol block #4 is an empty set; the first signal, the second signal, signal #3 and signal #4 are sent. The first signal, the second signal, signal #3, and signal #4 correspond to different antenna port groups, ie, are sent through different antenna port groups, and each antenna port group includes one or more antenna ports.

[0194] Figure 5 is an example of a set of subcarriers corresponding to each of four OFDM symbols provided in an embodiment of the present application. As shown in Figure 5, 501 represents the subcarriers included in the time-frequency resources occupied by OFDM symbol #1, namely, subcarrier #0 - subcarrier #(N-1), 502 represents the set of subcarriers corresponding to the modulation symbols in modulation symbol block #1, namely, subcarrier #0 - subcarrier #(N / 4-1); 503 represents the subcarriers included in the time-frequency resources occupied by OFDM symbol #2, namely, subcarrier #0 - subcarrier #(N-1), and 504 represents the set of subcarriers corresponding to the modulation symbols in modulation symbol block #2, namely, subcarrier #(N / 4) - subcarrier #(N / 2-1). 505 represents the subcarriers included in the time-frequency resources occupied by OFDM symbol #3, i.e., subcarrier #0 - subcarrier #(N-1). 506 represents the set of subcarriers corresponding to the modulation symbols in modulation symbol block #3, i.e., subcarrier #(N / 2) - subcarrier #(3N / 4-1). 507 represents the subcarriers included in the time-frequency resources occupied by OFDM symbol #4, i.e., subcarrier #0 - subcarrier #(N-1). 508 represents the set of subcarriers corresponding to the modulation symbols in modulation symbol block #4, i.e., subcarrier #(3N / 4) - subcarrier #(N-1). N is an integer multiple of 4, such as 256, 512, 1024, etc.

[0195] The implementation of a transmitter generating and transmitting more than two low-PAPR signals is similar to that of generating and transmitting two low-PAPR signals, such as a first signal and a second signal, and there is no substantial difference. This application uses the example of a transmitter generating and transmitting a first signal and a second signal to describe the transmitter generating and transmitting v low-PAPR signals. In other words, the technical solution of a transmitter generating and transmitting more than two low-PAPR signals also falls within the scope of protection of this application.

[0196] 403. The receiving end performs charging using the third signal.

[0197] In one possible implementation, the receiving end includes an energy collection circuit as shown in FIG3 , and the receiving end uses the received third signal to charge the receiving end through the energy collection circuit. The receiving end can also use the third signal to charge the receiving end in other ways, which are not limited in this application.

[0198] 404. The receiving end obtains a bit sequence based on the third signal.

[0199] The bit sequence includes the data information or control information carried by the above-mentioned first modulation symbol block. The bit sequence may also include the data information or control information carried by the above-mentioned second modulation symbol block. The bit sequence may be a bit data source (or data source), and the bit sequence includes multiple bits. In this application, the bit sequence may be named as a bit block or other names; the modulation symbol sequence may be named as a modulation symbol block or other names. The order of step 403 and step 404 is not limited. In an optional implementation, step 403 and step 404 may be parallel, that is, the receiving end executes step 403 and step 404 simultaneously.

[0200] In one possible implementation, the receiving end obtains the above-mentioned bit sequence based on the position of the modulation symbols carried by the subcarriers included in the above-mentioned third signal and the above-mentioned time-frequency resources in the first modulation symbol sequence, and the modulation symbols carried by the subcarriers included in the above-mentioned time-frequency resources include the modulation symbols in the above-mentioned first modulation symbol block and the modulation symbols in the above-mentioned second modulation symbol block, and the above-mentioned first modulation symbol block and the above-mentioned second modulation symbol block are obtained based on the above-mentioned first modulation symbol sequence. When the transmitting end sends more than two low-PAPR signals including the first signal and the second signal, the modulation symbols carried by the subcarriers included in the above-mentioned time-frequency resources may also include modulation symbols in other modulation symbol blocks, and the other modulation symbol blocks are carried on signals other than the first signal and the second signal. The embodiment of the present application is described by taking the modulation symbols carried by the subcarriers included in the above-mentioned time-frequency resources as an example, including the modulation symbols in the above-mentioned first modulation symbol block and the modulation symbols in the above-mentioned second modulation symbol block.

[0201] In one possible implementation, before executing step 404, the receiving end has stored the position of the modulation symbols carried by the subcarriers included in the above-mentioned time-frequency resources in the first modulation symbol sequence. Exemplarily, the transmitting end sends configuration information to the receiving end through high-layer signaling, and the receiving end obtains and stores, based on the configuration information, a group of data simultaneous transmission signals sent by the transmitting end, such as two or more signals including the first signal and the second signal, and the positions of the modulation symbols carried by the subcarriers included in the occupied time-frequency resources in the modulation symbol sequence, and the modulation symbol sequence is to be obtained by the receiving end. A group of data simultaneous transmission signals refers to multiple signals occupying the same time-frequency resources sent by the transmitting end through two or more antenna port groups, such as the above-mentioned first signal and the second signal, at least one of the multiple signals carries information and energy. Exemplarily, a communication protocol supported by the receiving end stipulates that the position of the modulation symbols carried by the subcarriers included in the occupied time-frequency resources sent by the transmitting end in the modulation symbol sequence. For example, a group of digital signals transmitted by a transmitting end, such as two or more signals including a first signal and a second signal, occupies 1024 subcarriers, and the 1024 subcarriers are numbered 0-1023; a communication protocol supported by a receiving end specifies the position of the modulation symbol carried by each numbered subcarrier in the first modulation symbol sequence. For example, the modulation symbol carried by the subcarrier numbered 0 is at the first position in the first modulation symbol sequence, the modulation symbol carried by the subcarrier numbered 1 is at the second position in the first modulation symbol sequence, the modulation symbol carried by the subcarrier numbered 2 is at the third position in the first modulation symbol sequence, and so on. The modulation symbol carried by the subcarrier numbered 1023 is at the 1024th position in the first modulation symbol sequence. For another example, the positions of the modulation symbols carried by the subcarriers numbered 0-63, 256-319, 512-575, and 768-831 in the first modulation symbol sequence are from the first position to the 256th position, wherein the subcarrier numbered 0 is the first position in the first modulation symbol sequence, the subcarrier numbered 831 is the 256th position in the first modulation symbol sequence; the modulation symbols carried by the subcarriers numbered 64-127, 320-383, 576-639, and 832-895 are in the first modulation symbol sequence. The positions in the symbol sequence are from the 257th position to the 512th position; the positions of the modulation symbols carried by the subcarriers numbered 128-191, 384-447, 640-703, and 896-959 in the first modulation symbol sequence are from the 513th position to the 768th position; the positions of the modulation symbols carried by the subcarriers numbered 192-256, 448-511, 704-767, and 960-1023 in the first modulation symbol sequence are from the 769th position to the 1024th position.

[0202] In one possible implementation, before executing step 404, the receiving end performs the following operations: receiving first information from the transmitting end; and determining, based on the first information, the position of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence. The first information may be downlink control information. In this implementation, the receiving end determines, based on the first information, the position of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence. The transmitting end can flexibly adjust the position of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence according to its own needs. The receiving end can also obtain the position of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence through other means, which is not limited in this application.

[0203] In an embodiment of the present application, the receiving end uses a third signal for charging, and obtains a bit sequence based on the third signal; thus, wireless energy transmission and data transmission can coexist. Since the third signal is obtained based on the first signal and the second signal, the third signal has a higher PAPR. Using the third signal for charging can improve the charging efficiency. Directly sending a signal with a higher PAPR by the transmitting end will reduce the efficiency of the power amplifier of its transmitter, and will also reduce the signal quantization noise ratio of its digital-to-analog converter and analog-to-digital converter, thereby causing the receiving end to deteriorate the data demodulation performance of the signal. Since the third signal is obtained based on the first signal and the second signal, rather than the transmitting end directly sending a signal with a higher PAPR, the third signal is used for charging, and a bit sequence is obtained based on the third signal; thus, both charging efficiency and data demodulation performance can be taken into account while achieving the coexistence of wireless energy transmission and data transmission.

[0204] FIG6 is a flow chart of another communication method provided by an embodiment of the present application. The method flow in FIG6 is a possible implementation of the method described in FIG4. Specifically, in the method flow in FIG6, the transmitting end sends first information to the receiving end, and the receiving end determines, based on the first information, the position of each modulation symbol carried by the subcarrier including the time-frequency resources occupied by the transmitting end sending a group of simultaneous transmission signals in the modulation symbol sequence. As shown in FIG6, the method includes:

[0205] 601. A sending end sends first information to a receiving end.

[0206] Correspondingly, the receiving end receives the first information from the transmitting end. The first information can be downlink control information (DCI) or high-layer signaling, such as radio resource control (RRC) signaling or medium access control element (MAC-CE) signaling, which is not limited in this application.

[0207] In one possible implementation, the first information includes a first index value, which is used to indicate the positions of modulation symbols carried by subcarriers included in the time-frequency resources occupied by a group of simultaneous digital and multi-function transmission signals sent by the transmitter in a first modulation symbol sequence. Exemplarily, the first index value indicates one of multiple patterns, with different formats corresponding to different position information, where the position information refers to the positions of modulation symbols carried by subcarriers included in the time-frequency resources occupied by a group of simultaneous digital and multi-function transmission signals sent by the transmitter in the first modulation symbol sequence. In the embodiment of the present application, the transmitting end sends the first signal, the second signal, the signal #3, and the signal #4 through four antenna port groups as an example, and describes the positions of the modulation symbols carried by the subcarriers included in the above-mentioned time-frequency resources in the first modulation symbol sequence, wherein each signal carries one OFDM symbol, and the first group of subcarriers included in the above-mentioned time-frequency resources carry the modulation symbols in the first modulation symbol block carried by the first signal, that is, the first group of subcarriers is a set of subcarriers corresponding to the modulation symbols in the first modulation symbol block, and the second group of subcarriers included in the above-mentioned time-frequency resources carry the modulation symbols in the second modulation symbol block carried by the second signal, that is, the second group of subcarriers is a set of subcarriers corresponding to the modulation symbols in the second modulation symbol block, and the third group of subcarriers included in the above-mentioned time-frequency resources carry the modulation symbols in the modulation symbol block #3 carried by signal #3, and the fourth group of subcarriers carry the modulation symbols in the modulation symbol block #4 carried by signal #4. The position of the modulation symbols carried by each group of subcarriers in the first modulation symbol sequence can be predefined or indicated by a first index value. The position of the modulation symbols carried by each group of subcarriers in the first modulation symbol sequence can be flexibly configured and is not limited here. The following introduces several possible examples of first index values ​​used to indicate the numbers of 4 groups of subcarriers and the positions of the modulation symbols carried by each group of subcarriers in the first modulation symbol sequence, wherein the above-mentioned time-frequency resources include 1024 subcarriers, numbered 0-1023. Each subcarrier included in the above-mentioned time-frequency resources has a number, and different subcarriers have different numbers. In this application, the number of subcarriers included in the above-mentioned time-frequency resources is not limited, and the above-mentioned time-frequency resources including 1024 subcarriers is only an example. The number of subcarriers included in the above-mentioned time-frequency resources can be an integer number of resource blocks (resource block, RB), for example, the above-mentioned time-frequency resources include 1200 subcarriers.

[0208] Exemplarily, the above-mentioned first index value is 1, and the first index value is used to indicate (centralized): the first group of subcarriers are numbered 0-255, the second group of subcarriers are numbered 256-511, the third group of subcarriers are numbered 512-767, and the fourth group of subcarriers are numbered 768-1023; the first index value is also used to indicate: the positions of the modulation symbols carried by each subcarrier in the first group of subcarriers in the order of numbering from small to large in the first modulation symbol sequence are from the 1st position to the 256th position, that is, the modulation symbol carried by the subcarrier with the smallest number is in the first modulation symbol sequence. The positions of the modulation symbols carried by each subcarrier in the first modulation symbol sequence are from the 257th position to the 512th position in the first modulation symbol sequence in the order of numbering from small to large in the second group of subcarriers, the positions of the modulation symbols carried by each subcarrier in the first modulation symbol sequence are from the 513th position to the 768th position in the first modulation symbol sequence in the order of numbering from small to large in the third group of subcarriers, and the positions of the modulation symbols carried by each subcarrier in the first modulation symbol sequence are from the 769th position to the 1024th position in the first modulation symbol sequence in the order of numbering from small to large in the fourth group of subcarriers. Figure 7A is an example of the frequency domain resources occupied by four groups of subcarriers, each of which is included in the time-frequency resources occupied by the transmitter for sending a group of simultaneous digital transmission signals provided in an embodiment of the present application. As shown in Figure 7A, 701 represents the frequency domain resources occupied by the first group of subcarriers (for example, carrying the modulation symbols in the first modulation symbol block), and the first group of subcarriers are numbered 0-255; 702 represents the frequency domain resources occupied by the second group of subcarriers (for example, carrying the modulation symbols in the second modulation symbol block), and the second group of subcarriers are numbered 256-511; 703 represents the frequency domain resources occupied by the third group of subcarriers, and the third group of subcarriers are numbered 512-767; 704 represents the frequency domain resources occupied by the fourth group of subcarriers, and the fourth group of subcarriers are numbered 768-1023.

[0209] For example, the first index value is 2, and the first index value is used to indicate (equally spaced interleaved): the first group of subcarriers are numbered 0-63, 256-319, 512-575, 768-831, the second group of subcarriers are numbered 64-127, 320-383, 576-639, 832-895, the third group of subcarriers are numbered 128-191, 384-447, 640-703, 896-959, and the fourth group of subcarriers are numbered 192-256, 448-511, 704-767, 960-1023; the first index value is also used to indicate: the first group of subcarriers are numbered in ascending order. The positions of the modulation symbols carried by each subcarrier in the first modulation symbol sequence are from the 1st position to the 256th position, the positions of the modulation symbols carried by each subcarrier in the second group of subcarriers in ascending order of numbering are from the 257th position to the 512th position, the positions of the modulation symbols carried by each subcarrier in the third group of subcarriers in ascending order of numbering are from the 513th position to the 768th position, and the positions of the modulation symbols carried by each subcarrier in the fourth group of subcarriers in ascending order of numbering are from the 769th position to the 1024th position. Figure 7B is another example of the frequency domain resources occupied by four groups of subcarriers, each of which is included in the time-frequency resources occupied by a group of simultaneous digital transmission signals sent by the transmitter, provided in an embodiment of the present application. As shown in Figure 7B, 701 represents the frequency domain resources occupied by the first group of subcarriers (for example, carrying the modulation symbols in the first modulation symbol block); 702 represents the frequency domain resources occupied by the second group of subcarriers (for example, carrying the modulation symbols in the second modulation symbol block); 703 represents the frequency domain resources occupied by the third group of subcarriers; and 704 represents the frequency domain resources occupied by the fourth group of subcarriers.

[0210] For example, the first index value is 3, and the first index value is used to indicate (non-equally spaced interleaving): the first group of subcarriers are numbered 0-63, 512-575, 832-895, 960-1023, the second group of subcarriers are numbered 128-191, 256-319, 576-639, 896-959, the third group of subcarriers are numbered 192-256, 448-511, 704-767, 768-831, and the fourth group of subcarriers are numbered 64-127, 320-383, 384-447, 640-703; the first index value is also used to indicate: the subcarriers in the first group are numbered in ascending order. The positions of the modulation symbols carried by each subcarrier in the first modulation symbol sequence are from the 1st position to the 256th position, the positions of the modulation symbols carried by each subcarrier in the second group of subcarriers in the order of numbering from small to large are from the 257th position to the 512th position, the positions of the modulation symbols carried by each subcarrier in the third group of subcarriers in the order of numbering from small to large are from the 513th position to the 768th position, and the positions of the modulation symbols carried by each subcarrier in the fourth group of subcarriers in the first modulation symbol sequence are from the 769th position to the 1024th position. Figure 7C is another example of the frequency domain resources occupied by four groups of subcarriers respectively included in the time-frequency resources occupied by the transmitter sending a group of simultaneous transmission signals provided by an embodiment of the present application. As shown in Figure 7C, 701 represents the frequency domain resources occupied by the first group of subcarriers; 702 represents the frequency domain resources occupied by the second group of subcarriers (for example, carrying the modulation symbols in the second modulation symbol block); 703 represents the frequency domain resources occupied by the third group of subcarriers; and 704 represents the frequency domain resources occupied by the fourth group of subcarriers.

[0211] Different groups of subcarriers can be sets of different subcarriers in the same time-frequency resource occupied by different antenna port groups at the transmitter. Different antenna port groups occupy different groups of subcarriers, and the PAPRs of the signals transmitted by different antenna port groups are also different. For example, when the above four groups of subcarriers are equally spaced and interleaved, the PAPR of the signal transmitted by the transmitter is less than the PAPR of the signal transmitted by the transmitter when the above four groups of subcarriers are centralized. In one possible implementation, the transmitter (e.g., a base station) divides the subcarriers in the above time-frequency resource into four groups based on the current distribution of its available resources. Figure 7D is another example of the frequency domain resources occupied by four groups of subcarriers included in the time-frequency resources occupied by a group of simultaneous digital transmission signals sent by the transmitter, provided by an embodiment of the present application. As shown in Figure 7D, 701 represents the frequency domain resources occupied by the first group of subcarriers; 702 represents the frequency domain resources occupied by the second group of subcarriers; 703 represents the frequency domain resources occupied by the third group of subcarriers; 704 represents the frequency domain resources occupied by the fourth group of subcarriers, and 705 represents the resources already used by the transmitter, so the allocation of these resources is skipped when allocating frequency domain resources. The above solution is only a possible example, and the first index values ​​sent by the transmitting end in different time slots may be the same or different.

[0212] In one possible implementation, the first index value is used to indicate at least one of the numbers of multiple first subcarriers included in the time-frequency resource that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence. At least one of the numbers of multiple first subcarriers included in the time-frequency resource that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence may be predefined. In one possible implementation, the first index value or another first index value is further used to indicate at least one of the numbers of multiple second subcarriers included in the time-frequency resource that carry the modulation symbols in the second modulation symbol block and the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence. The numbers of multiple second subcarriers included in the time-frequency resource that carry the modulation symbols in the second modulation symbol block and the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence may be predefined. Exemplarily, the first index value is used to indicate that multiple first subcarriers numbered 0-63, 512-575, 832-895, and 960-1023 among the subcarriers included in the time-frequency resources carry the modulation symbols in the first modulation symbol block, and that the modulation symbols carried by the multiple first subcarriers in ascending order of numbering are positioned from the 1st position to the 256th position in the first modulation symbol sequence. Exemplarily, the first index value is used to indicate that multiple first subcarriers numbered 0-63, 512-575, 832-895, and 960-1023 among the subcarriers included in the time-frequency resources carry the modulation symbols in the first modulation symbol block, and that the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence are predefined, for example, the modulation symbols carried by the multiple first subcarriers in ascending order of numbering are positioned from the 1st position to the 256th position in the first modulation symbol sequence. Exemplarily, the above-mentioned first index value is used to indicate that the positions of the modulation symbols carried by the above-mentioned multiple first subcarriers in ascending order of numbering are from the 1st position to the 256th position in the above-mentioned first modulation symbol sequence, and the numbers of the above-mentioned multiple first subcarriers are predefined, for example, the numbers of the multiple first subcarriers are 0-63, 256-319, 512-575, 768-831.Exemplarily, the above-mentioned first index value is used to indicate that multiple first subcarriers numbered 0-63, 512-575, 832-895, and 960-1023 among the subcarriers included in the above-mentioned time-frequency resources carry the modulation symbols in the above-mentioned first modulation symbol block, and the positions of the modulation symbols carried by the multiple first subcarriers in ascending order in the first modulation symbol sequence are from the 1st position to the 256th position respectively; the above-mentioned first index value or another first index value is also used to indicate that multiple second subcarriers numbered 128-191, 256-319, 576-639, and 896-959 among the subcarriers included in the above-mentioned time-frequency resources carry the modulation symbols in the above-mentioned second modulation symbol block, and the positions of the modulation symbols carried by the multiple second subcarriers in ascending order in the first modulation symbol sequence are from the 257th position to the 512th position respectively.

[0213] 602. The receiving end determines, based on the first information, positions of modulation symbols carried by subcarriers included in time-frequency resources occupied by a group of simultaneous digital transmission signals sent by the transmitting end in a modulation symbol sequence.

[0214] In one possible implementation, the transmitter periodically sends the first information, so that the position of each modulation symbol carried by the subcarrier including the time-frequency resources occupied by the transmitter in sending a group of digital simultaneous transmission signals can be updated in a timely manner.

[0215] In one possible implementation, before sending a group of digital simultaneous transmission signals, the transmitting end sends indication information, such as first information (first value), for indicating the position of each modulation symbol carried by the subcarriers included in the time-frequency resources occupied by the group of digital simultaneous transmission signals in the modulation symbol sequence; based on the indication information, the receiving end determines the position of each modulation symbol carried by the subcarriers included in the time-frequency resources occupied by the group of digital simultaneous transmission signals in the modulation symbol sequence. In one possible implementation, when the position associated with the group of digital simultaneous transmission signals to be sent (i.e., the position of each modulation symbol carried by the subcarriers included in the time-frequency resources occupied by the group of digital simultaneous transmission signals in the modulation symbol sequence) is different from the position associated with the group of digital simultaneous transmission signals sent by the transmitting end to the receiving end last time, the transmitting end sends indication information again, such as first information (second value), for indicating the position associated with the group of digital simultaneous transmission signals to be sent. In this implementation, if the position at which the transmitter associates a group of digital simultaneous transmission signals to be sent is the same as the position at which the transmitter associated a group of digital simultaneous transmission signals last sent to the receiver, the transmitter does not need to send indication information, thereby saving signaling overhead.

[0216] In one possible implementation, the first information includes a first transmission parameter, and the first transmission parameter is used to determine at least one of the following: the numbering of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block, the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence, the numbering of multiple second subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the second modulation symbol block, and the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence. Exemplarily, the first transmission parameter is used to determine the numbering of multiple first subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the first modulation symbol block, the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence, the numbering of multiple second subcarriers in the subcarriers included in the time-frequency resources that carry the modulation symbols in the second modulation symbol block, and the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence. In one possible implementation, the first transmission parameter includes at least one of the number of the multiple first subcarriers, the first order parameter, the number of the multiple second subcarriers, and the second order parameter. The first order parameter is used to determine the position of the modulation symbol in the first modulation symbol block in the first modulation symbol sequence, and the second order parameter is also used to determine the position of the modulation symbol in the second modulation symbol block in the first modulation symbol sequence. In one possible implementation, the first transmission parameter includes a first number, the number of subcarrier groups k1, the number of subcarriers contained in each group of subcarriers k2, and an order parameter c, wherein k1 indicates that the subcarriers carrying modulation symbols in the subcarriers included in the time-frequency resources are divided into k1 groups, the order parameter c indicates the order of the k1 groups of subcarriers, and the first number is used to determine the number of each group of subcarriers.

[0217] Exemplarily, the above-mentioned first transmission parameters include: a first number (for example, a value of 1), k1=4, k2=256, c={1,2,3,4}, and the above-mentioned first transmission parameters represent (when the value of the first number is 1, the first number indicates that the subcarriers included in the above-mentioned time-frequency resources are split into multiple groups of subcarriers in a centralized manner): there are k1=4 groups of subcarriers, and the number of subcarriers contained in each group is k2=256. The order of these k1=4 groups is c={1,2,3,4}, that is, the first group of subcarriers (first group of subcarriers), the second group of subcarriers (second group of subcarriers), the third group of subcarriers (third group of subcarriers), and the fourth group of subcarriers (fourth group of subcarriers). Based on the first transmission parameter, the receiving end can determine that the first group of subcarriers are numbered 0-255, the second group of subcarriers are numbered 256-511, the third group of subcarriers are numbered 512-768, and the fourth group of subcarriers are numbered 769-1024, and the positions of the modulation symbols carried by each subcarrier in the first group of subcarriers in ascending order of numbering are from the 1st position to the 256th position in the first modulation symbol sequence, the positions of the modulation symbols carried by each subcarrier in the second group of subcarriers in ascending order of numbering are from the 257th position to the 512th position in the first modulation symbol sequence, the positions of the modulation symbols carried by each subcarrier in the third group of subcarriers in ascending order of numbering are from the 513th position to the 768th position in the first modulation symbol sequence, and the positions of the modulation symbols carried by each subcarrier in the fourth group of subcarriers in ascending order of numbering are from the 769th position to the 1024th position in the first modulation symbol sequence.

[0218] Exemplarily, the above-mentioned first transmission parameters include: a first number (for example, a value of 2), k1=4, k2=256, c={1,2,3,4}, k3=4, L=256, and the above-mentioned first transmission parameters represent (when the value of the first number is 2, the first number indicates that the subcarriers included in the above-mentioned time-frequency resources are split into multiple groups of subcarriers in an equally spaced interleaved manner): there are k1=4 groups of subcarriers, and the number of subcarriers contained in each group is k2=256. The initial (first) subcarrier number of the i-th group is 0+64*i. The order of these k1=4 groups is c={1,2,3,4}, that is, the first group of subcarriers, the second group of subcarriers, the third group of subcarriers, and the fourth group of subcarriers. Each group of subcarriers is further split into k3=4 small groups, and the interval between each group is L=256. Based on the first transmission parameter, the receiving end can determine that the first group of subcarriers are numbered 0-63, 256-319, 512-575, 768-831, the second group of subcarriers are numbered 64-127, 320-383, 576-639, 832-895, the third group of subcarriers are numbered 128-191, 384-447, 640-703, 896-959, and the fourth group of subcarriers are numbered 192-256, 448-511, 704-767, 960-1023. The positions of the modulation symbols carried by each group of subcarriers in the first modulation symbol sequence can be referred to the above example.

[0219] Exemplarily, the first transmission parameter includes: a first number (for example, a value of 3), k1=4, k2=256, c={1,2,3,4}, k3=4, and the first transmission parameter indicates that (when the value of the first number is 3, the first number indicates that the subcarriers included in the time-frequency resource are split into multiple groups of subcarriers in a non-equally spaced interleaving manner): there are k1=4 groups of subcarriers, and the number of subcarriers contained in each group is k2=256. The order of these k1=4 groups is c={1,2,3,4}, that is, the first group of subcarriers, the second group of subcarriers, the third group of subcarriers. The first group of subcarriers is further divided into k3=4 groups. The initial subcarrier numbers of the k3=4 groups in the first group of subcarriers are {0, 512, 832, 960}, the initial subcarrier numbers of the k3=4 groups in the second group of subcarriers are {128, 256, 576, 896}, the initial subcarrier numbers of the k3=4 groups in the third group of subcarriers are {192, 448, 704, 768}, and the initial subcarrier numbers of the k3=4 groups in the fourth group of subcarriers are {64, 320, 384, 640}. Based on the first transmission parameter, the receiving end can determine that the first group of subcarriers are numbered 0-63, 512-575, 832-895, and 960-1023, the second group of subcarriers are numbered 128-191, 256-319, 576-639, and 896-959, the third group of subcarriers are numbered 192-256, 448-511, 704-767, and 768-831, and the fourth group of subcarriers are numbered 64-127, 320-383, 384-447, and 640-703. The positions of the modulation symbols carried by each group of subcarriers in the first modulation symbol sequence can be referred to the above example.

[0220] 603. The transmitting end generates a first signal and a second signal.

[0221] Step 603 may refer to step 401 in FIG. 4 .

[0222] 604. The transmitting end sends the first signal and the second signal to the receiving end.

[0223] Accordingly, the receiving end receives the third signal. The third signal can be a set of simultaneous transmission signals sent by the transmitting end and received by the receiving end. Steps 603 and 604 can be examples of the transmitting end generating and transmitting v low-PAPR signals, where v is an integer greater than or equal to 1. For descriptions of the first, second, and third signals, please refer to the relevant descriptions in Figure 4 and will not be repeated here. Step 604 can refer to step 402 in Figure 4.

[0224] 605. The receiving end obtains a bit sequence based on the third signal and the position of the modulation symbol carried by the subcarrier included in the time-frequency resources occupied by the third signal in the first modulation symbol sequence.

[0225] The modulation symbols carried by the subcarriers included in the time-frequency resources include the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block, where the first modulation symbol block and the second modulation symbol block are obtained based on the first modulation symbol sequence. The time-frequency resources occupied by the third signal may be the time-frequency resources occupied by the transmitter for sending a set of simultaneous digital and wireless transmission signals (including the first signal and the second signal).

[0226] In one possible implementation, the receiving end obtains a first modulation sequence based on the position of each modulation symbol carried by the subcarriers included in the third signal and the above-mentioned time-frequency resources in the first modulation symbol sequence; and demodulates the first modulation sequence to obtain a bit sequence. Exemplarily, the time-frequency resources occupied by the third signal include 1024 subcarriers, numbered 0-1023. The receiving end determines, based on the first information, that the modulation symbol carried by the subcarrier numbered 0 is at the first position in the first modulation symbol sequence, the modulation symbol carried by the subcarrier numbered 1 is at the second position in the first modulation symbol sequence, the modulation symbol carried by the subcarrier numbered 2 is at the third position in the first modulation symbol sequence, and so on, the modulation symbol carried by the subcarrier numbered 1023 is at the 1024th position in the first modulation symbol sequence; the receiving end uses the modulation symbol obtained from the subcarrier numbered 0 as the first modulation symbol in the first modulation symbol sequence, the modulation symbol obtained from the subcarrier numbered 1 as the second modulation symbol in the first modulation symbol sequence, and so on, and uses the modulation symbol obtained from the subcarrier numbered 1023 as the 1024th modulation symbol in the first modulation symbol sequence, and finally obtains the first modulation symbol sequence.

[0227] Exemplarily, the time-frequency resources occupied by the third signal include 1024 subcarriers, numbered 0-1023, and the receiving end determines based on the first information that the subcarriers numbered 0-63, 256-319, 512-575, and 768-831 carry modulation symbols (for example, modulation symbols in the first modulation symbol block) in the first modulation symbol sequence in the order of numbering from small to large. The positions of the subcarriers numbered 64-127, 320-383, 576-639, and 832-895 are in the order of numbering from small to large. The positions of the modulation symbols carried in sequence (for example, the modulation symbols in the second modulation symbol block) in the first modulation symbol sequence are the 257th position to the 512th position, and the subcarriers numbered 128-191, 384-447, 640-703, and 896-959 are in descending order. The positions of the modulation symbols carried in the first modulation symbol sequence are the 513th position to the 768th position, and the subcarriers numbered 192-256, 448-511, 704-767, and 960-1023 are in descending order. The positions of the modulation symbols carried by the subcarriers in the first modulation symbol sequence are from the 769th position to the 1024th position; the receiving end obtains the modulation symbols carried by the subcarriers numbered 0-63, 256-319, 512-575, and 768-831 in descending order of the subcarrier numbers to obtain the first subsequence; the receiving end obtains the modulation symbols carried by the subcarriers numbered 64-127, 320-383, 576-639, and 832-895 in descending order of the subcarrier numbers to obtain the second subsequence; the receiving end obtains the modulation symbols carried by the subcarriers numbered 64-127, 320-383, 576-639, and 832-895 in descending order of the subcarrier numbers to obtain the second subsequence; The modulation symbols carried by the subcarriers numbered 128-191, 384-447, 640-703, and 896-959 are obtained in ascending order of the carrier numbers to obtain a third subsequence; the receiving end obtains the modulation symbols carried by the subcarriers numbered 192-256, 448-511, 704-767, and 960-1023 in ascending order of the subcarrier numbers to obtain a fourth subsequence; the receiving end splices the first subsequence, the second subsequence, the third subsequence, and the fourth subsequence in order to obtain a first modulation symbol sequence.

[0228] 606. The receiving end performs charging using the third signal.

[0229] Step 606 can refer to step 403 in Figure 4. The order of step 606 and step 605 is not limited. Step 605 and step 606 can be performed in parallel.

[0230] In an embodiment of the present application, the transmitting end sends a first information to the receiving end, and the receiving end determines, based on the first information, the position of each modulation symbol carried by the subcarrier included in the time-frequency resources occupied by a group of digital and energy simultaneous transmission signals sent by the transmitting end in the modulation symbol sequence. The transmitting end can flexibly adjust the position of the modulation symbol carried by the subcarrier included in the time-frequency resources occupied by a group of digital and energy simultaneous transmission signals in the modulation symbol sequence according to its own needs. The transmitting end sends the first signal and the second signal, instead of directly sending the third signal with a higher PAPR; it can achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance.

[0231] FIG8 is a flow chart of another communication method provided by an embodiment of the present application. The method flow in FIG8 is a possible implementation of the method described in FIG6. Specifically, FIG8 describes a possible method of the process of generating v OFDM symbols (including the first OFDM symbol and the second OFDM symbol) at the transmitting end. As shown in FIG8, the method includes:

[0232] 801. A sending end sends first information to a receiving end.

[0233] Correspondingly, the receiving end receives the first information from the sending end.

[0234] In one possible implementation, the first information includes a first index value, which indicates the number of v groups of subcarriers, including the time-frequency resources occupied by a group of simultaneous transmission signals transmitted by the transmitter, and the position of the modulation symbols carried by each group of subcarriers in the modulation symbol sequence. v can be 2, 3, 4, 5, 6, 8, 9, 10, 12, 16, etc., and is not limited in this application. For ease of understanding, the following description uses v equal to 4 as an example. For an example of the first index value, see step 601 in Figure 6.

[0235] In one possible implementation, the first information includes a first transmission parameter. The first transmission parameter is used by the receiving end to determine the time-frequency resources occupied by the transmitting end when transmitting a group of simultaneous digital transmission signals, including the numbers of the v groups of subcarriers and the positions of the modulation symbols carried by each group of subcarriers in the modulation symbol sequence. An example of the first transmission parameter can be found in step 602 of Figure 6.

[0236] 802. The receiving end determines, based on the first information, the time-frequency resources occupied by a group of simultaneous digital transmission signals sent by the transmitting end, including the numbers of the v groups of subcarriers and the positions of the modulation symbols carried by each group of subcarriers in the modulation symbol sequence.

[0237] Step 801 and step 802 are optional. The order of step 802 and step 806 below is not limited. The receiving end may store the numbers of the v groups of subcarriers included in the time-frequency resources occupied by the transmitting end for sending a group of digital and capable simultaneous transmission signals, and the positions of the modulation symbols carried by each group of subcarriers in the modulation symbol sequence. Exemplarily, a communication protocol supported by the receiving end stipulates that the numbers of the v groups of subcarriers included in the time-frequency resources occupied by the transmitting end for sending a group of digital and capable simultaneous transmission signals, and the positions of the modulation symbols carried by each group of subcarriers in the modulation symbol sequence, that is, it predefines the numbers of the v groups of subcarriers included in the time-frequency resources occupied by the transmitting end for sending a group of digital and capable simultaneous transmission signals, and the positions of the modulation symbols carried by each group of subcarriers in the modulation symbol sequence.

[0238] 803. The transmitting end modulates the bit sequence to obtain a first modulation symbol sequence.

[0239] The present application does not limit the way in which the transmitter modulates the bit sequence. For example, the transmitter modulates the bit sequence in any of the following ways: amplitude shift keying (ASK), frequency shift keying (FSK), phase shift keying (PSK), quadrature amplitude modulation (QAM), or binary on-off keying (OOK). It should be noted that for some modulation methods, such as OOK modulation, there is a case where the value of the modulation symbol is 0. In this case, the transmitter can map the modulation symbols with a value of 0 in different subsequences obtained based on the first modulation symbol sequence to the same subcarrier, and then indicate the subcarrier positions corresponding to these modulation symbols with a value of 0 to the receiving end. For example, the bit sequence is [b(0),…,b(M bit -1)], the first modulation symbol sequence is [d(0),…,d(M symb -1)], the first modulation symbol sequence can be a complex modulation symbol block, and the length of the bit sequence is M bit , the length of the first modulation symbol sequence is M symb .

[0240] 804. The transmitting end splits the first modulation symbol sequence into v subsequences.

[0241] v is an integer greater than 1, and v is less than or equal to the number of antenna port groups available for the above-mentioned time-frequency resources. Alternatively, v is less than or equal to the number of RF channels currently available to the transmitting end. The above-mentioned v subsequences include a first subsequence and a second subsequence, the above-mentioned first subsequence corresponds to the above-mentioned first modulation symbol block, and the above-mentioned second subsequence corresponds to the above-mentioned second modulation symbol block. The above-mentioned first subsequence may include modulation symbols with a value of 0, and the above-mentioned second subsequence may include modulation symbols with a value of 0. Neither the above-mentioned first modulation symbol block nor the above-mentioned second modulation symbol block includes modulation symbols with a value of 0. In a possible implementation, the first subsequence is a first modulation symbol block, and the above-mentioned second subsequence is the above-mentioned second modulation symbol block. In a possible implementation, the first modulation symbol block is obtained based on the first subsequence, for example, only includes modulation symbols with values ​​not equal to 0 in the first subsequence; the second modulation symbol block is obtained based on the second subsequence, for example, only includes modulation symbols with values ​​not equal to 0 in the second subsequence.

[0242] In one possible implementation, the transmitting end splits the first modulation symbol sequence into v subsequences based on the number of its radio frequency channels. For example, the number of radio frequency channels currently available to the transmitting end is v, and the transmitting end splits the first modulation symbol sequence into v subsequences. In one possible implementation, the transmitting end splits the first modulation symbol sequence into v subsequences based on the number of antenna port groups (i.e., the maximum configurable antenna port groups) that are available for the time-frequency resources occupied by a group of digital simultaneous transmission signals sent by the transmitting end. For example, the number of antenna port groups that are available for the time-frequency resources occupied by a group of digital simultaneous transmission signals sent by the transmitting end is v, and the transmitting end splits the first modulation symbol sequence into v subsequences. Assume that the length of the first modulation symbol sequence is M symb , taking uniform splitting as an example, the number of modulation symbols contained in each subsequence is (M symb / v), that is (M symb / 4).

[0243] In a possible implementation, steps 803 to 804 are replaced by: the transmitting end splits the bit sequence into v sub-bit sequences; and the transmitting end modulates the v sub-bit sequences respectively to obtain v sub-sequences.

[0244] 805. The transmitter obtains v OFDM symbols based on the v subsequences.

[0245] In one possible implementation, the above-mentioned v subsequences include a first subsequence, a second subsequence, a third subsequence, and a fourth subsequence. Based on the first subsequence, a first OFDM symbol is obtained; based on the second subsequence, a second OFDM symbol is obtained; based on the third subsequence, a third OFDM symbol is obtained; and based on the fourth subsequence, a fourth OFDM symbol is obtained. This application does not limit the specific implementation method of step 805. An example of step 805 is as follows: the transmitting end maps the modulation symbols contained in the first subsequence to the first group of subcarriers included in the time-frequency resources occupied by a group of simultaneous transmission signals, thereby obtaining a first OFDM symbol; maps the modulation symbols contained in the second subsequence to the second group of subcarriers included in the time-frequency resources, thereby obtaining a second OFDM symbol; maps the modulation symbols contained in the third subsequence to the third group of subcarriers included in the time-frequency resources, thereby obtaining a third OFDM symbol; and maps the modulation symbols contained in the fourth subsequence to the fourth group of subcarriers included in the time-frequency resources, thereby obtaining a fourth OFDM symbol. This application does not limit the numbering of each group of subcarriers in the subcarriers included in the time-frequency resources. Exemplarily, the time-frequency resources occupied by a group of simultaneous transmission signals sent by the transmitting end include 1024 subcarriers, numbered 0-1023. The first group of subcarriers included in the time-frequency resources are numbered 0-63, 256-319, 512-575, 768-831, the second group of subcarriers are numbered 64-127, 320-383, 576-639, 832-895, the third group of subcarriers are numbered 128-191, 384-447, 640-803, 896-959, and the fourth group of subcarriers are numbered 192-256, 448-511, 804-767, 960-1023. It should be noted that the first OFDM symbol, the second OFDM symbol, the third OFDM symbol, and the fourth OFDM symbol share the time-frequency resources. If the subcarriers at certain positions in one of the four OFDM symbols are occupied by modulation symbols (i.e., carry modulation symbols), then the subcarriers at the corresponding positions in other OFDM symbols cannot be placed (carry) modulation symbols. In other words, the set of subcarriers carrying modulation symbols in any two OFDM symbols is an empty set. For example, the intersection of the first group of subcarriers in the first OFDM symbol and the second group of subcarriers in the second OFDM symbol is an empty set.

[0246] 806. The transmitter sends v signals based on v OFDM symbols.

[0247] Accordingly, the receiving end receives a third signal. The third signal may be a set of digital simultaneous transmission signals (the v signals mentioned above) sent by the transmitting end and received by the receiving end. The v signals may include the first signal and the second signal. The PAPR of any of the v signals may be less than or equal to a preset first threshold. The PAPR of the third signal may be greater than a preset second threshold. The first threshold and the second threshold may be the same or different.

[0248] In one possible implementation, the v OFDM symbols include a first OFDM symbol, a second OFDM symbol, a third OFDM symbol, and a fourth OFDM symbol. The transmitter up-converts the first OFDM symbol and transmits a first signal carrying the first OFDM symbol through the first antenna port group; up-converts the second OFDM symbol and transmits a second signal carrying the second OFDM symbol through the second antenna port group; up-converts the third OFDM symbol and transmits signal #3 carrying the third OFDM symbol through the third antenna port group; up-converts the fourth OFDM symbol and transmits signal #4 carrying the first OFDM symbol through the fourth antenna port group; these four signals occupy the same time-frequency resources, that is, the time-frequency resources occupied by a group of simultaneous transmission signals transmitted by the transmitter. The above-mentioned v signals include the first signal, the second signal, signal #3, and signal #4.

[0249] FIG9A is an example diagram of the process of generating and sending a set of simultaneous transmission signals by a transmitting end provided in an embodiment of the present application. The process shown in FIG9A is an example of steps 803 to 806. As shown in FIG9A , the process of generating and sending a set of simultaneous transmission signals by a transmitting end is as follows: modulating a bit sequence (see step 803) to obtain a modulation symbol sequence; sequence splitting (see step 804), for example, splitting the modulation symbol sequence into a first subsequence, a second subsequence, a third subsequence, and a fourth subsequence; symbol mapping (see 805), that is, generating a first OFDM symbol, a second OFDM symbol, a third OFDM symbol, and a fourth OFDM symbol based on the subsequences obtained by splitting; and signal transmission (see step 806).

[0250] Figure 9B is a schematic diagram of a symbol mapping and OFDM symbol generation process provided by an embodiment of the present application. As shown in Figure 9B, the first subsequence is first subjected to a serial-to-parallel conversion; then, the modulation symbols in the first subsequence are mapped to the first group of subcarriers, and the values ​​of the modulation symbols placed on other subcarriers are 0; the first group of subcarriers are subjected to an inverse fast Fourier transform (IFFT) and a parallel-to-serial conversion, and finally the first OFDM symbol is obtained. Figure 9B describes the first subsequence as an example, and the method of generating OFDM symbols based on other subsequences is similar.

[0251] 807. The receiving end uses the third signal to perform charging.

[0252] Step 807 may refer to step 403 in FIG. 4 .

[0253] 808. The receiving end obtains modulation symbols from each group of subcarriers based on the numbers of the v groups of subcarriers included in the time-frequency resources occupied by a group of digital simultaneous transmission signals sent by the transmitting end, to obtain the above-mentioned v subsequences.

[0254] In one possible implementation, modulation symbols are obtained from the subcarriers in the first group of subcarriers in ascending order (or from large to small) according to the subcarrier numbers to obtain a first subsequence; modulation symbols are obtained from the subcarriers in the second group of subcarriers in descending order (or from large to small) according to the subcarrier numbers to obtain a second subsequence; modulation symbols are obtained from the subcarriers in the third group of subcarriers in descending order (or from large to small) according to the subcarrier numbers to obtain a third subsequence; modulation symbols are obtained from the subcarriers in the fourth group of subcarriers in descending order (or from large to small) according to the subcarrier numbers to obtain a fourth subsequence.

[0255] 809. The receiving end obtains a first modulation symbol sequence based on the v subsequences.

[0256] The receiving end obtains the first modulation symbol sequence based on the above v subsequences, which can be replaced by: the receiving end recovers the first modulation symbol sequence based on the above v subsequences. When the influence of channel transmission on the modulation symbols is not considered, the receiving end can obtain the first modulation symbol sequence based on the v subsequences obtained in step 808. This application does not consider the influence of channel transmission on the modulation symbols. When the influence of channel transmission on the modulation symbols is considered, the receiving end can adopt the existing technical means in the field to obtain the above bit sequence based on the above v subsequences. For example, when the influence of channel transmission on the modulation symbols is considered, the receiving end obtains the initial modulation symbol sequence based on the above v subsequences; the receiving end demodulates the initial modulation symbol sequence to obtain the initial bit sequence; the receiving end corrects the data information in the initial bit sequence based on the error correction information (or check information) in the initial bit sequence to recover the above bit sequence.

[0257] In one possible implementation, the receiving end splices the v subsequences based on the positions of the modulation symbols carried by each group of subcarriers in the v groups of subcarriers in the modulation symbol sequence to obtain a first modulation symbol sequence. Exemplarily, the positions of the modulation symbols carried by each subcarrier in the first group of subcarriers in ascending order of numbering in the first modulation symbol sequence are from the 1st position to the 256th position, the positions of the modulation symbols carried by each subcarrier in the second group of subcarriers in ascending order of numbering in the first modulation symbol sequence are from the 257th position to the 512th position, the positions of the modulation symbols carried by each subcarrier in the third group of subcarriers in ascending order of numbering in the first modulation symbol sequence are from the 513th position to the 768th position, and the positions of the modulation symbols carried by each subcarrier in the fourth group of subcarriers in ascending order of numbering in the first modulation symbol sequence are from the 769th position to the 1024th position; the receiving end splices the first subsequence, the second subsequence, the third subsequence, and the fourth subsequence in sequence to obtain the first modulation symbol sequence.

[0258] 810. The receiving end demodulates the first modulation symbol sequence to obtain a bit sequence.

[0259] 809', the receiving end demodulates the v subsequences respectively to obtain v sub-bit sequences.

[0260] The v sub-bit sequences include a first sub-bit sequence, a second sub-bit sequence, a third sub-bit sequence, and a fourth sub-bit sequence. The first sub-bit sequence is obtained by demodulating the first sub-bit sequence, the second sub-bit sequence is obtained by demodulating the second sub-bit sequence, the third sub-bit sequence is obtained by demodulating the third sub-bit sequence, and the fourth sub-bit sequence is obtained by demodulating the fourth sub-bit sequence.

[0261] 810': The receiving end obtains a bit sequence based on the v sub-bit sequences.

[0262] In a possible implementation, the receiving end concatenates the v sub-bit sequences based on the positions of the modulation symbols carried by each group of subcarriers in the v groups of subcarriers in the modulation symbol sequence to obtain a bit sequence. Exemplarily, in the first group of subcarriers, the positions of the modulation symbols carried by each subcarrier in the first modulation symbol sequence are from the 1st position to the 256th position in ascending order of numbering; in the second group of subcarriers, the positions of the modulation symbols carried by each subcarrier in the first modulation symbol sequence are from the 257th position to the 512th position in ascending order of numbering; in the third group of subcarriers, the positions of the modulation symbols carried by each subcarrier in the first modulation symbol sequence are from the 513th position to the 768th position in ascending order of numbering; in the fourth group of subcarriers, the positions of the modulation symbols carried by each subcarrier in the first modulation symbol sequence are from the 769th position to the 1024th position in ascending order of numbering; the receiving end sequentially splices the first subbit sequence (corresponding to the first group of subcarriers), the second subbit sequence (corresponding to the second group of subcarriers), the third subbit sequence (corresponding to the third group of subcarriers), and the fourth subbit sequence (corresponding to the fourth group of subcarriers) to obtain a bit sequence.

[0263] Steps 809 to 810 may be replaced by steps 809' to 810'. The method flow in FIG8 includes steps 809 to 810 or steps 809' to 810'.

[0264] In the embodiment of the present application, the transmitting end sends v signals instead of directly sending a third signal with a higher PAPR; while achieving the coexistence of wireless energy transmission and data transmission, it can take into account both charging efficiency and data demodulation performance.

[0265] FIG10 is a flow chart of another communication method provided by an embodiment of the present application. The method flow in FIG10 is a possible implementation of the method described in FIG6. Specifically, FIG10 describes another possible implementation of the process of the transmitting end generating v OFDM symbols (including the first OFDM symbol and the second OFDM symbol). As shown in FIG10, the method includes:

[0266] 1001. A sending end sends first information to a receiving end.

[0267] Correspondingly, the receiving end receives the first information from the sending end.

[0268] 1002. The receiving end determines, based on the first information, the time-frequency resources occupied by a group of simultaneous digital transmission signals sent by the transmitting end, including the numbers of the v groups of subcarriers and the positions of the modulation symbols carried by each group of subcarriers in the modulation symbol sequence.

[0269] Step 1001 and step 1002 are optional. For step 1001 and step 1002, please refer to step 801 and step 802 in FIG8 .

[0270] 1003. The transmitting end modulates the bit sequence to obtain a first modulation symbol sequence.

[0271] Step 1003 may refer to step 803 in FIG. 8 .

[0272] 1004. The transmitting end maps the first modulation symbol sequence to v layers to obtain v subsequences.

[0273] v is an integer greater than 1, and the above v layers correspond to the above v subsequences one by one. Step 1004 is a possible implementation of splitting the first modulation symbol sequence into v subsequences. The operation performed in step 1004 is layer mapping. The vector corresponding to the above v layers can be x(i)=[x (0) (i),…,x (v-1) (i)], M symb is the length of the first modulation symbol sequence, x (0) (i) is the modulation symbol of layer 0, x (v-1) (i) is the modulation symbol of the (v-1)th layer. v is less than or equal to the number of antenna port groups available for the above time-frequency resources. Alternatively, v is less than or equal to the number of RF channels currently available to the transmitter.

[0274] In one possible implementation, the first modulation symbol sequence and the vector x(i) corresponding to the v layer satisfy the following first mapping rule:

[0275] Wherein, d(vk) represents the (vk)th modulation symbol in the above-mentioned first modulation symbol sequence, d(vk+1) represents the (vk+1)th modulation symbol in the above-mentioned first modulation symbol sequence, d(vk+v-1) represents the (vk+v-)th modulation symbol in the above-mentioned first modulation symbol sequence, k is an integer greater than or equal to 0, and the value range of k is 0 to ((M symb / v)-1), the first mapping rule indicates that the (vk+j)th modulation symbol in the first modulation symbol sequence is mapped to the (vk+j)th symbol of the jth layer, where j is an integer greater than or equal to 0, and x (0) (vk) represents the (vk)th symbol of the 0th layer, corresponding to the (vk)th modulation symbol in the first modulation symbol sequence, x (1) (vk+1) represents the (vk+1)th symbol of the first layer, corresponding to the (vk+1)th modulation symbol in the first modulation symbol sequence. (v-1)(vk+v-1) represents the (vk+v-1)th symbol of the (v-1)th layer, corresponding to the (vk+v-1)th modulation symbol in the first modulation symbol sequence. For example, v is equal to 2, 3, 4, 5, 6, 8, 9, 10, 12, 16, etc., which is not limited in this application. The embodiment of this application is described by taking v equal to 4 as an example. For example, v is equal to 4, M symb =1024, the transmitter maps the first modulation symbol sequence to v layers based on the first mapping rule to obtain v subsequences, the v subsequences including the first subsequence, the second subsequence, the third subsequence, and the fourth subsequence, the first subsequence including x (0) (0), x (0) (4), x (0) (8),…,x (0) (1020), the second subsequence includes x (1) (1), x (1) (5) x (1) (9),…,x (1) (1021), the third subsequence includes x (2) (2) x (2) (6), x (2) (10),…,x (2) (1022), the fourth subsequence includes x (3) (3) x (3) (7), x (3) (11),…,x (3) (1023).

[0276] In one possible implementation, the first modulation symbol sequence and the vector x(i) corresponding to the v layer satisfy the following third mapping rule:

[0277] Wherein, d(vi) represents the (vi)th modulation symbol in the above-mentioned first modulation symbol sequence, d(vi+1) represents the (vi+1)th modulation symbol in the above-mentioned first modulation symbol sequence, d(vi+v-1) represents the (vi+v-1)th modulation symbol in the above-mentioned first modulation symbol sequence, and i is an integer greater than or equal to 0, and the value range of i is 0 to The third mapping rule indicates that the (vi+j)th modulation symbol in the first modulation symbol sequence is mapped to the i-th symbol of the j-th layer, where j is an integer greater than or equal to 0, and x is (0) (i) represents the i-th symbol of layer 0, corresponding to the (vi)-th modulation symbol in the first modulation symbol sequence, x (v-1) (i) represents the i-th symbol of the (v-1)-th layer, corresponding to the (vi+v-1)-th modulation symbol in the first modulation symbol sequence. For example, v is equal to 4, Msymb =1024, the transmitter maps the first modulation symbol sequence to v layers based on the third mapping rule to obtain v subsequences, the v subsequences including the first subsequence, the second subsequence, the third subsequence, and the fourth subsequence, the first subsequence including x (0) (0), x (0) (1), x (0) (2),…,x (0) (255), the second subsequence includes x (1) (0), x (1) (1), x (1) (2),…,x (1) (255), the third subsequence includes x (2) (0), x (2) (1), x (2) (2),…,x (2) (255), the fourth subsequence includes x (3) (0), x (3) (1), x (3) (2),…,x (3) (255).

[0278] 1005. The transmitting end maps the v subsequences to v antenna port groups.

[0279] Different subsequences can be mapped to different antenna port groups. In one possible implementation, the first modulation symbol sequence and the vector x(i) corresponding to the v layer satisfy the first mapping rule; the transmitting end maps the vector [x (0) (i),…,x (v-1) (i)] is mapped to v antenna port groups, and the vector [x (0) (i),…,x (v-1) (i)] and the modulation symbols corresponding to the above-mentioned v antenna port groups satisfy the following second mapping rule:

[0280] Among them, x (0) (i) represents the i-th modulation symbol of layer 0, represents the i-th modulation symbol of antenna port group p0, x (v-1) (i) represents the i-th modulation symbol of the (v-1)-th layer, Indicates antenna port group p v-1 The second mapping rule indicates that the i-th modulation symbol of the s-th layer is mapped to the antenna port group p s On the i-th modulation symbol, s is greater than or equal to 0 and less than or equal to (v-1), {p0,…,p v-1} is the antenna port group set, For example, v=4, the modulation symbol block to be sent (associated) by antenna port group p0 includes y (0) (0),y (0) (4) y (0) (8),…,y (0) (1020), the modulation symbol block to be sent by antenna port group p1 includes y (1) (1) y (1) (5) y (1) (9),…,y (1) (1021), the modulation symbol block to be sent by antenna port group p2 includes y (2) (2) y (2) (6) y (2) (10),…,y (2) (1022), the modulation symbol block to be sent by antenna port group p2 includes y (2) (3) y (2) (7) y (2) (11),…,y (3) (1023), where y (0) (0) corresponds to d(0), y (1) (1) corresponds to d(1), y (2) (2) corresponds to d(2), y (3) (3) corresponds to d(3), y (0) (4) corresponds to d(4), and so on.

[0281] In a possible implementation, the first modulation symbol sequence and the vector x(i) corresponding to the v layer satisfy the third mapping rule; the transmitting end converts the vector [x (0) (i),…,x (v-1) (i)] is mapped to v antenna port groups, and the vector [x (0) (i),…,x (v-1) (i)] The modulation symbols corresponding to the above-mentioned v antenna port groups satisfy the following fourth mapping rule:

[0282] Among them, x (0) (i) represents the i-th modulation symbol of layer 0, represents the vith modulation symbol of antenna port group p0, x (v-1) (i) represents the i-th modulation symbol of the (v-1)-th layer, Indicates antenna port group p v-1 The (vi+v-1)th modulation symbol, the fourth mapping rule indicates that the i-th modulation symbol of the s-th layer is mapped to the antenna port group p sOn the (vi+s)th modulation symbol, s is greater than or equal to 0 and less than or equal to (v-1), {p0,…,p v-1} is the antenna port group set, For example, v=4, the modulation symbol block to be sent (associated) by antenna port group p0 includes y (0) (0),y (0) (4) y (0) (8),…,y (0) (1020), the modulation symbol block to be sent by antenna port group p1 includes y (1) (1) y (1) (5) y (1) (9),…,y (1) (1021), the modulation symbol block to be sent by antenna port group p2 includes y (2) (2) y (2) (6) y (2) (10),…,y (2) (1022), the modulation symbol block to be sent by antenna port group p3 includes y (3) (3) y (3) (7) y (3) (11),…,y (3) (1023), where y (0) (0) corresponds to d(0), y (1) (1) corresponds to d(1), y (2) (2) corresponds to d(2), y (3) (3) corresponds to d(3), y (0) (4) corresponds to d(4), and so on.

[0283] 1006. The transmitter maps the modulation symbol block associated with each antenna port group to the subcarrier corresponding to the antenna port group to obtain v OFDM symbols.

[0284] In one possible implementation, Mapped sequentially to the corresponding p-th antenna port group subcarriers to obtain OFDM symbols, where p is greater than or equal to 0 and less than or equal to (v-1). For example, the transmitter converts y in the modulation symbol block associated with antenna port group p0 to (0) (0),y (0) (4) y (0) (8),…,y (0) (1020) is mapped sequentially to the antenna port group p0 subcarriers, obtain the first OFDM symbol; y in the modulation symbol block associated with the antenna port group p1 (1) (1) y (1) (5) y(1) (9),…,y (1) (1021) is mapped to the antenna port group p1 in sequence subcarriers, obtain the second OFDM symbol; y in the modulation symbol block associated with the antenna port group p2 (2) (2) y (2) (6) y (2) (10),…,y (2) (1022) is mapped to the antenna port group p2 in sequence subcarriers, obtain the third OFDM symbol; y in the modulation symbol block associated with antenna port group p3 (3) (3) y (3) (7) y (3) (11),…,y (3) (1023) is mapped to the antenna port group p3 in sequence subcarriers to obtain the fourth OFDM symbol.

[0285] 1007. The transmitter sends v signals based on v OFDM symbols.

[0286] Accordingly, the receiving end receives a third signal. The third signal may be the signal received by the receiving end after the v signals transmitted by the transmitting end are transmitted through the channel. Because the v signals occupy the same time-frequency resources, the v signals transmitted by the transmitting end are superimposed into a single signal during transmission. The third signal is the signal received by the receiving end resulting from the superposition of the v signals. Optionally, the v signals may all correspond to information about the same logical channel or physical channel.

[0287] 1008. The receiving end uses the third signal to perform charging.

[0288] 1009. The receiving end obtains modulation symbols from each group of subcarriers based on the numbers of the v groups of subcarriers included in the time-frequency resources occupied by a group of digital simultaneous transmission signals sent by the transmitting end, to obtain the above-mentioned v subsequences.

[0289] Steps 1007 to 1009 may refer to steps 806 to 808 in FIG. 8 .

[0290] 1010. The receiving end obtains a first modulation symbol sequence based on the above v subsequences.

[0291] The embodiment of the present application does not consider the impact of channel transmission on modulation symbols, and is described by taking the example of the receiving end obtaining the first modulation symbol sequence based on the above-mentioned v subsequences.

[0292] In a possible implementation, the receiving end splits and concatenates the v subsequences based on the positions of the modulation symbols carried by each group of subcarriers in the v groups of subcarriers in the modulation symbol sequence to obtain a first modulation symbol sequence. Exemplarily, v is equal to 4, and the above-mentioned v subsequences include a first subsequence, a second subsequence, a third subsequence and a fourth subsequence. The modulation symbols in the first subsequence are, in order, the 1st position, the 5th position, the 9th position, ..., the 1021st position in the first modulation symbol sequence. The modulation symbols in the second subsequence are, in order, the 2nd position, the 6th position, the 10th position, ..., the 1022nd position in the first modulation symbol sequence. The modulation symbols in the third subsequence are, in order, the 3rd position, the 7th position, the 11th position, ..., the 1023rd position in the first modulation symbol sequence. The modulation symbols in the first subsequence are, in order, the 4th position, the 8th position, the 12th position, ..., the 1024th position in the first modulation symbol sequence. The receiving end splits and splices the first subsequence, the second subsequence, the third subsequence and the fourth subsequence according to the position of the modulation symbols in each subsequence in the first modulation symbol sequence to obtain a first modulation symbol sequence.

[0293] 1011. The receiving end demodulates the first modulation symbol sequence to obtain a bit sequence.

[0294] In one possible implementation, the receiving end splits and concatenates the v sub-bit sequences based on the position of the modulation symbols carried by each group of subcarriers in the v groups of subcarriers in the modulation symbol sequence to obtain a first modulation symbol sequence. 1010' and 1011' are as follows:

[0295] 1010', the receiving end demodulates the above v subsequences respectively to obtain v sub-bit sequences.

[0296] The v sub-bit sequences include a first sub-bit sequence, a second sub-bit sequence, a third sub-bit sequence, and a fourth sub-bit sequence. The first sub-bit sequence is obtained by demodulating the first sub-bit sequence, the second sub-bit sequence is obtained by demodulating the second sub-bit sequence, the third sub-bit sequence is obtained by demodulating the third sub-bit sequence, and the fourth sub-bit sequence is obtained by demodulating the fourth sub-bit sequence.

[0297] 1011′: The receiving end obtains a bit sequence based on the above v sub-bit sequences.

[0298] The implementation of step 1011' is similar to step 1011 and will not be described in detail here.

[0299] In this embodiment of the present application, layer mapping is used to map the first modulation symbol sequence to v layers, and then the vectors of the v layers are mapped to v antenna port groups, thereby avoiding the need to split the first modulation symbol sequence. In addition, the transmitter sends v signals instead of directly sending a third signal with a higher PAPR. This allows for the coexistence of wireless energy transmission and data transmission while balancing charging efficiency and data demodulation performance.

[0300] Figure 11 is a flow chart of another communication method provided by an embodiment of the present application. The method flow in Figure 11 is a possible implementation of the method described in Figure 4. Figure 11 describes how v signals (including the first signal and the second signal in Figure 4) sent by the transmitting end are used by the first receiving end and the second receiving end to charge and obtain information after being transmitted through the channel, wherein the first receiving end or the second receiving end is the receiving end in Figure 4. As shown in Figure 11, the method includes:

[0301] 1101. A transmitting end generates v signals, where the v signals occupy the same time-frequency resources, and an intersection of subcarrier sets corresponding to modulation symbol blocks carried by any two of the v signals is an empty set.

[0302] The embodiment of the present application is described by taking v equal to 4, and v signals including a first signal, a second signal, signal #3, and signal #4 as an example. The first signal carries OFDM symbol #1 (the first OFDM symbol), the second signal carries OFDM symbol #2 (the second OFDM symbol), signal #3 carries OFDM symbol #3, and signal #4 carries OFDM symbol #4. OFDM symbol #1, OFDM symbol #2, OFDM symbol #3, and OFDM symbol #4 occupy the same time-frequency resources. OFDM symbol #1 carries modulation symbol block #1 (i.e., the first modulation symbol block), OFDM symbol #2 carries modulation symbol block #2 (i.e., the second modulation symbol block), OFDM symbol #3 carries modulation symbol block #3, and OFDM symbol #4 carries modulation symbol block #4. The intersection of the sets of any two corresponding subcarriers in modulation symbol block #1, modulation symbol block #2, modulation symbol block #3, and modulation symbol block #4 is an empty set. The modulation symbol block carried by the first signal is modulation symbol block #1. The subcarrier set corresponding to the modulation symbol block carried by the first signal is the set of subcarriers included in the time-frequency resources that carry the modulation symbols in the modulation symbol block #1.

[0303] 1102. The transmitting end sends the above v signals.

[0304] The transmitting end sends different signals through different antenna port groups. For example, the transmitting end sends the first signal through the first antenna port group, sends the second signal through the second antenna port group, sends signal #3 through the third antenna port group, and sends signal #4 through the fourth antenna port group. The method in which the transmitting end sends a group of simultaneous digital transmission signals to two or more receiving ends is similar to the method in which the transmitting end sends a group of simultaneous digital transmission signals to two receiving ends. The embodiment of the present application is introduced by taking the transmitting end sending a group of simultaneous digital transmission signals to the first receiving end and the second receiving end as an example, wherein the first receiving end uses the signal received from the transmitting end to charge and obtain information, and the second receiving end uses the signal received from the transmitting end to obtain information and / or charge. For example, both the first receiving end and the second receiving end receive a third signal. The third signal is a signal received by the receiving end after transmission of v signals including the first signal and the second signal, which occupy the same time-frequency resources, sent by the transmitting end. In one possible implementation, when the above-mentioned v signals correspond to two or more receiving ends, the signals corresponding to different receiving ends are transmitted through different channels. In other words, when a transmitter sends a signal to two or more receivers, the signals corresponding to the different receivers are sent via different channels. For example, the first and second signals correspond to the first receiver, while signals #3 and #4 correspond to the second receiver. The transmitter transmits the first and second signals via the first channel and transmits signals #3 and #4 via the second channel.

[0305] 1103. The first receiving end is charged using the third signal.

[0306] 1104. The first receiving end obtains a first bit sequence based on the third signal.

[0307] In one possible implementation, the first modulation symbol block and modulation symbol block #3 are obtained based on a first modulation symbol sequence; the first receiving end obtains a first modulation symbol sequence based on the third signal and the position of the modulation symbols carried by the subcarriers included in the time-frequency resources occupied by the third signal in the first modulation symbol sequence; and the first modulation symbol sequence is demodulated to obtain a first bit sequence. In one possible implementation, the first receiving end predefines (or preconfigures) a group of subcarriers included in the time-frequency resources occupied by the data transmission signal (e.g., the third signal) and the numbers of multiple subcarriers #1 that carry the modulation symbols in the first modulation symbol sequence, as well as the positions of the modulation symbols carried by the multiple subcarriers #1 in the first modulation symbol sequence. The modulation symbols in the first modulation symbol sequence are the modulation symbols sent by the transmitting end to the first receiving end, or in other words, the first modulation symbol sequence is the modulation symbol sequence that the first receiving end needs to obtain. The modulation symbols carried by the multiple subcarriers #1 are the modulation symbols sent by the transmitting end to the first receiving end. Exemplarily, the first receiving end predefines (or preconfigures) a group of time-frequency resources occupied by a data simultaneous transmission signal (e.g., a third signal), including subcarriers numbered 0-63, 256-319, 512-575, and 768-831 that carry modulation symbols in a first modulation symbol sequence, and subcarriers numbered 0-63, 256-319, 512-575, and 768-831 that carry modulation symbols (e.g., modulation symbols in a first modulation symbol block) in ascending order of numbering, and their positions in the first modulation symbol sequence are from the first position to the 256th position, respectively.

[0308] 1105. The second receiving end is charged using the third signal.

[0309] 1106. The second receiving end obtains a second bit sequence based on the third signal.

[0310] In one possible implementation, the second modulation symbol block and modulation symbol block #4 are obtained based on a second modulation symbol sequence; the second receiving end obtains a second modulation symbol sequence based on the third signal and the position of the modulation symbols carried by the subcarriers included in the time-frequency resources occupied by the third signal in the second modulation symbol sequence; and the second modulation symbol sequence is demodulated to obtain a second bit sequence. In one possible implementation, the second receiving end predefines (or preconfigures) a group of subcarriers included in the time-frequency resources occupied by the data transmission signal (e.g., the third signal) and the numbers of multiple subcarriers #2 that carry the modulation symbols in the second modulation symbol sequence, as well as the positions of the modulation symbols carried by the multiple subcarriers #2 in the second modulation symbol sequence. The modulation symbols in the second modulation symbol sequence are the modulation symbols sent by the transmitting end to the second receiving end, or in other words, the second modulation symbol sequence is the modulation symbol sequence that the second receiving end needs to obtain. The modulation symbols carried by the multiple subcarriers #2 are the modulation symbols sent by the transmitting end to the second receiving end. Exemplarily, the second receiving end predefines (or preconfigures) a group of time-frequency resources occupied by the data simultaneous transmission signal (e.g., the third signal), including subcarriers numbered 64-127, 320-383, 576-639, and 832-895, which carry the modulation symbols in the second modulation symbol sequence, and the positions of the modulation symbols carried by the subcarriers numbered 64-127, 320-383, 576-639, and 832-895 in the second modulation symbol sequence in ascending order are from the first position to the 256th position. One of step 1105 and step 1106 is optional. The order of step 1103 and step 1105 is not limited. The order of step 1105 and step 1106 is not limited.

[0311] In this embodiment of the present application, a transmitter simultaneously sends a set of simultaneous data and energy transmission signals to multiple receivers, thereby improving resource utilization. Instead of directly sending a single signal with a higher PAPR, the transmitter sends multiple signals with lower PAPRs. This allows for the coexistence of wireless energy transmission and data transmission while balancing charging efficiency and data demodulation performance.

[0312] FIG12 is a flow chart of another communication method provided by an embodiment of the present application. The method flow in FIG12 is a possible implementation of the method described in FIG11. FIG12 describes, based on FIG11, how the receiving end determines, based on information sent by the transmitting end (e.g., second information and third information), the position of each modulation symbol carried by the subcarrier included in the time-frequency resources occupied by the transmitting end in sending a group of simultaneous transmission signals, in a modulation symbol sequence, see steps 1201 to 1204. As shown in FIG12, the method includes:

[0313] 1201. A sending end sends second information to a first receiving end.

[0314] Correspondingly, the first receiving end receives the second information from the transmitting end. The embodiment of the present application is described by taking a group of digital simultaneous transmission signals sent by the transmitting end including a first signal, a second signal, signal #3, and signal #4 as an example, wherein the first signal carries OFDM symbol #1 (first OFDM symbol), the second signal carries OFDM symbol #2 (second OFDM symbol), signal #3 carries OFDM symbol #3, and signal #4 carries OFDM symbol #4, OFDM symbol #1 carries modulation symbol block #1 (i.e., first modulation symbol block), OFDM symbol #2 carries modulation symbol block #2 (i.e., second modulation symbol block), OFDM symbol #3 carries modulation symbol block #3, and OFDM symbol #4 carries modulation symbol block #4, and the intersection of the sets of any two corresponding subcarriers in modulation symbol block #1, modulation symbol block #2, modulation symbol block #3, and modulation symbol block #4 is an empty set.

[0315] The second information is used by the transmitting end to determine the position of the modulation symbol in the modulation symbol block #1 carried by the subcarrier including the time-frequency resources occupied by the digital simultaneous transmission signal, and the position of the modulation symbol in the modulation symbol block #3 carried by the subcarrier including the above-mentioned time-frequency resources in the first modulation symbol sequence. The modulation symbol block #1 and the modulation symbol block #3 are obtained based on the above-mentioned first modulation symbol sequence, and the above-mentioned first modulation symbol sequence is obtained based on the bit sequence to be sent to the first receiving end. Exemplarily, the time-frequency resources include a total of 1024 subcarriers numbered 0-1023, and the second information is used to indicate that the first group of subcarriers numbered 0-63, 256-319, 512-575, and 768-831 included in the time-frequency resources carry the modulation symbols in the modulation symbol block #1, and the positions of the modulation symbols carried by each subcarrier in the first group of subcarriers in ascending order of numbering are from the 1st position to the 256th position in the first modulation symbol sequence, respectively. The time-frequency resources include a third group of subcarriers numbered 128-191, 384-447, 640-703, and 896-959 that carry the modulation symbols in the modulation symbol block #3, and the positions of the modulation symbols carried by each subcarrier in the third group of subcarriers in ascending order of numbering are from the 257th position to the 512th position in the first modulation symbol sequence.

[0316] 1202. Based on the second information, the first receiving end determines the position of the modulation symbol in the modulation symbol block #1 carried by the subcarrier including the time-frequency resources occupied by the transmitting end in sending a group of digital simultaneous transmission signals, and the position of the modulation symbol in the modulation symbol block #3 in the first modulation symbol sequence.

[0317] 1203. The sending end sends third information to the second receiving end.

[0318] Correspondingly, the second receiving end receives the third information from the transmitting end. The above-mentioned third information is used to determine the position of the modulation symbol in the modulation symbol block #2 carried by the subcarrier included in the above-mentioned time-frequency resources in the second modulation symbol sequence and the position of the modulation symbol in the modulation symbol block #4 carried by the subcarrier included in the above-mentioned time-frequency resources in the second modulation symbol sequence. The modulation symbol block #2 and the modulation symbol block #4 are obtained based on the above-mentioned second modulation symbol sequence, and the above-mentioned second modulation symbol sequence is obtained based on the bit sequence to be sent to the second receiving end. The above-mentioned second receiving end is different from the above-mentioned first receiving end. The order of step 1201 and step 1203 is not limited. Exemplarily, the time-frequency resources include a total of 1024 subcarriers numbered 0-1023, and the third information is used to indicate that the second group of subcarriers numbered 64-127, 320-383, 576-639, and 832-895 included in the time-frequency resources carry the modulation symbols in the modulation symbol block #2, and the positions of the modulation symbols carried by each subcarrier in the second group of subcarriers in ascending order of numbering are from the 1st position to the 256th position in the second modulation symbol sequence, respectively. The time-frequency resources include a fourth group of subcarriers numbered 192-256, 448-511, 704-767, and 960-1023 that carry the modulation symbols in the modulation symbol block #4, and the positions of the modulation symbols carried by each subcarrier in the fourth group of subcarriers in ascending order of numbering are from the 257th position to the 512th position in the second modulation symbol sequence.

[0319] 1204. Based on the third information, the second receiving end determines the position of the modulation symbol in the modulation symbol block #2 carried by the subcarrier including the time-frequency resources occupied by the transmitting end in sending a group of digital simultaneous transmission signals, and the position of the modulation symbol in the modulation symbol block #4 in the second modulation symbol sequence.

[0320] 1205. The transmitting end generates a first signal, a second signal, signal #3, and signal #4.

[0321] The way in which the transmitting end generates and sends the first signal and signal #3 can be referred to steps 803 to 806 in Figure 8. The way in which the transmitting end generates and sends the second signal and signal #4 is similar to the way in which the transmitting end generates and sends the first signal and signal #3, and will not be repeated here.

[0322] 1206. The transmitting end sends the first signal, the second signal, signal #3 and signal #4.

[0323] Accordingly, both the first receiving end and the second receiving end receive the third signal. The third signal may be a set of simultaneous transmission signals transmitted by the transmitting end and received by the receiving end (including the first receiving end and the second receiving end). Steps 1205 and 1206 may be examples of the transmitting end generating and transmitting v low-PAPR signals, where v is an integer greater than or equal to 1.

[0324] 1207. The first receiving end is charged using the third signal.

[0325] 1208. The first receiving end obtains a first modulation symbol sequence based on the position of the modulation symbol in the modulation symbol block #1 carried by the subcarrier including the time-frequency resources occupied by the third signal in the first modulation symbol sequence, and the position of the modulation symbol in the modulation symbol block #3 in the first modulation symbol sequence.

[0326] The embodiment of the present application does not consider the impact of channel transmission on modulation symbols, and is described by taking the example of the receiving end obtaining the first modulation symbol sequence based on the third signal.

[0327] The order of step 1207 and step 1208 is not limited. Exemplarily, the time-frequency resources include 1024 subcarriers numbered 0-1023, and the second information is used to indicate that the first group of subcarriers numbered 0-63, 256-319, 512-575, and 768-831 included in the time-frequency resources carry the modulation symbols in the modulation symbol block #1, and the positions of the modulation symbols carried by each subcarrier in the first group of subcarriers in ascending order of numbering are from the 1st position to the 256th position in the first modulation symbol sequence, and the third group of subcarriers numbered 128-191, 384-447, 640-703, and 896-959 included in the time-frequency resources carry the modulation symbols in the modulation symbol block #1. The modulation symbols in the modulation symbol block #3 are carried by the modulation symbols carried by the subcarriers in the third group of subcarriers in ascending order of subcarrier numbering, and the positions of the modulation symbols in the first modulation symbol sequence are from the 257th position to the 512th position, respectively; the first receiving end obtains the modulation symbols from the subcarriers in the first group of subcarriers in ascending order of subcarrier numbering (or from largest to smallest), to obtain a first subsequence; the first receiving end obtains the modulation symbols from the subcarriers in the third group of subcarriers in ascending order of subcarrier numbering (or from largest to smallest), to obtain a third subsequence; the receiving end concatenates the first subsequence and the third subsequence to obtain a first modulation symbol sequence.

[0328] 1209. The first receiving end demodulates the first modulation symbol sequence to obtain a first bit sequence.

[0329] 1210. The first receiving end is charged using the third signal.

[0330] Step 1210 is optional. The order of step 1210 and step 1207 is not limited.

[0331] 1211. The second receiving end obtains a second modulation symbol sequence based on the position of the modulation symbol in the modulation symbol block #2 carried by the subcarrier including the time-frequency resources occupied by the third signal in the second modulation symbol sequence, and the position of the modulation symbol in the modulation symbol block #4 in the second modulation symbol sequence.

[0332] The order of step 1210 and step 1211 is not limited. The order of step 1208 and step 1211 is not limited. Exemplarily, the above-mentioned time-frequency resources include a total of 1024 subcarriers numbered 0-1023, and the third information is used to indicate that the second group of subcarriers numbered 64-127, 320-383, 576-639, 832-895 included in the above-mentioned time-frequency resources carry the modulation symbols in the modulation symbol block #2, and the positions of the modulation symbols carried by each subcarrier in the second group of subcarriers in ascending order of numbering are from the 1st position to the 256th position in the second modulation symbol sequence, and the fourth group of subcarriers numbered 192-256, 448-511, 704-767, 960-1023 included in the above-mentioned time-frequency resources carry the modulation symbols in the modulation symbol block #2. The modulation symbols in the modulation symbol block #4 are carried by each subcarrier in the fourth group of subcarriers in ascending order of subcarrier numbering, and the positions of the modulation symbols carried by each subcarrier in the second modulation symbol sequence are from the 257th position to the 512th position, respectively; the second receiving end obtains the modulation symbols from the subcarriers in the second group of subcarriers in descending order of subcarrier numbering (or from large to small), to obtain a second subsequence; the second receiving end obtains the modulation symbols from the subcarriers in the fourth group of subcarriers in descending order of subcarrier numbering (or from large to small), to obtain a fourth subsequence; the receiving end splices the second subsequence and the fourth subsequence to obtain a second modulation symbol sequence.

[0333] 1212. The second receiving end demodulates the second modulation symbol sequence to obtain a second bit sequence.

[0334] In an embodiment of the present application, the transmitting end sends the second information to the first receiving end, and sends the third information to the second receiving end; the transmitting end can flexibly adjust the time-frequency resources occupied by the subcarriers of the sending group of simultaneous digital energy transmission signals according to its own needs, and the position of the modulation symbols carried by the subcarriers in the modulation symbol sequence. The transmitting end sends a group of simultaneous digital energy transmission signals to multiple receiving ends at the same time, which can improve resource utilization. The transmitting end sends multiple signals with lower PAPR, instead of directly sending a signal with higher PAPR; it can achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance.

[0335] Figure 13 is a flow chart of another communication method provided by an embodiment of the present application. The method flow in Figure 13 is a possible implementation of the method described in Figure 4. Based on Figure 4, Figure 13 describes how the first receiving end and the second receiving end determine, based on information sent by the transmitting end (such as the second information or the third information), the position of each modulation symbol carried by the subcarrier included in the time-frequency resources occupied by the transmitting end sending a group of digital simultaneous transmission signals in the modulation symbol sequence, referring to steps 1301 to 1304. The first receiving end or the second receiving end in Figure 13 is the receiving end in Figure 4. As shown in Figure 13, the method includes:

[0336] 1301. A sending end sends second information to a first receiving end.

[0337] Correspondingly, the first receiving end receives the second information from the transmitting end. For ease of understanding, the embodiment of the present application is described by taking a group of simultaneous digital transmission signals sent by the transmitting end including a first signal and a second signal as an example, wherein the first signal carries a first OFDM symbol, the second signal carries a second OFDM symbol, the first OFDM symbol carries a first modulation symbol block and a third modulation symbol block, the second OFDM symbol carries a second modulation symbol block and a fourth modulation symbol block, and the intersection of the sets of any two corresponding subcarriers in the first modulation symbol block, the second modulation symbol block, the third modulation symbol block, and the fourth modulation symbol block is an empty set.

[0338] The second information is used by the transmitting end to determine the position of the modulation symbols in the first modulation symbol block carried by the subcarriers included in the time-frequency resources occupied by a group of simultaneous transmission signals, and to determine the position of the modulation symbols in the second modulation symbol block carried by the subcarriers included in the above-mentioned time-frequency resources in the first modulation symbol sequence. The first modulation symbol block and the second modulation symbol block are obtained based on the above-mentioned first modulation symbol sequence, and the above-mentioned first modulation symbol sequence is obtained based on the bit sequence to be sent to the first receiving end. Exemplarily, the time-frequency resources include a total of 1024 subcarriers numbered 0-1023, and the second information is used to indicate that the first group of subcarriers numbered 0-63, 256-319, 512-575, and 768-831 included in the time-frequency resources carry the modulation symbols in the first modulation symbol block, and the positions of the modulation symbols carried by each subcarrier in the first group of subcarriers in ascending order of numbering are from the 1st position to the 256th position in the first modulation symbol sequence, respectively. The time-frequency resources include a second group of subcarriers numbered 128-191, 384-447, 640-703, and 896-959 that carry the modulation symbols in the second modulation symbol block, and the positions of the modulation symbols carried by each subcarrier in the second group of subcarriers in ascending order of numbering are from the 257th position to the 512th position in the first modulation symbol sequence.

[0339] 1302. Based on the second information, the first receiving end determines the position of the modulation symbols in the first modulation symbol block carried by the subcarriers including the time-frequency resources occupied by the transmitting end in sending a group of digital simultaneous transmission signals, and the position of the modulation symbols in the second modulation symbol block in the first modulation symbol sequence.

[0340] 1303. The sending end sends third information to the second receiving end.

[0341] Correspondingly, the second receiving end receives the third information from the transmitting end. The above-mentioned third information is used to determine the position of the modulation symbols in the third modulation symbol block carried by the subcarriers included in the above-mentioned time-frequency resources in the second modulation symbol sequence and the position of the modulation symbols in the fourth modulation symbol block carried by the subcarriers included in the above-mentioned time-frequency resources in the second modulation symbol sequence. The third modulation symbol block and the fourth modulation symbol block are obtained based on the above-mentioned second modulation symbol sequence, and the above-mentioned second modulation symbol sequence is obtained based on the bit sequence to be sent to the second receiving end. The above-mentioned second receiving end is different from the above-mentioned first receiving end. The order of step 1301 and step 1303 is not limited. Exemplarily, the time-frequency resources include a total of 1024 subcarriers numbered 0-1023, and the third information is used to indicate that the third group of subcarriers numbered 64-127, 320-383, 576-639, and 832-895 included in the time-frequency resources carry the modulation symbols in the third modulation symbol block, and the modulation symbols carried by each subcarrier in the third group of subcarriers in order from small to large are positioned from the 1st position to the 256th position in the second modulation symbol sequence, respectively. The time-frequency resources include a fourth group of subcarriers numbered 192-256, 448-511, 704-767, and 960-1023 that carry the modulation symbols in the fourth modulation symbol block, and the modulation symbols carried by each subcarrier in the fourth group of subcarriers in order from small to large are positioned from the 257th position to the 512th position in the second modulation symbol sequence.

[0342] 1304. Based on the third information, the second receiving end determines the position of the modulation symbols in the third modulation symbol block carried by the subcarriers including the time-frequency resources occupied by the transmitting end in sending a group of digital simultaneous transmission signals, and the position of the modulation symbols in the fourth modulation symbol block in the second modulation symbol sequence.

[0343] 1305. The transmitting end generates a first signal and a second signal.

[0344] In one possible implementation, the transmitting end modulates a first bit sequence to obtain a first modulation symbol sequence; splits the first modulation symbol sequence into a first modulation symbol block and a second modulation symbol block; the transmitting end modulates a second bit sequence to obtain a second modulation symbol sequence; splits the second modulation symbol sequence into a third modulation symbol block and a fourth modulation symbol block; the transmitting end maps the modulation symbols contained in the first modulation symbol block to a first group of subcarriers included in the time-frequency resources occupied by a group of digital simultaneous transmission signals, and maps the modulation symbols contained in the third modulation symbol block to a third group of subcarriers included in the time-frequency resources to obtain a first OFDM symbol; the transmitting end maps the modulation symbols contained in the second modulation symbol block to the second group of subcarriers included in the time-frequency resources, and maps the modulation symbols contained in the fourth modulation symbol block to the fourth group of subcarriers included in the time-frequency resources to obtain a second OFDM symbol; generates a first signal based on the first OFDM symbol, and generates a second signal based on the second OFDM symbol.

[0345] 1306. The transmitting end sends the first signal and the second signal.

[0346] Correspondingly, both the first receiving end and the second receiving end receive the third signal. The third signal can be a set of digital simultaneous transmission signals sent by the transmitting end and received by the receiving end (including the first receiving end and the second receiving end).

[0347] 1307. The first receiving end is charged using the third signal.

[0348] 1308. The first receiving end obtains a first modulation symbol sequence based on the position of the modulation symbols in the first modulation symbol block carried by the subcarriers including the time-frequency resources occupied by the third signal in the first modulation symbol sequence, and the position of the modulation symbols in the second modulation symbol block in the first modulation symbol sequence.

[0349] This embodiment of the present application does not consider the impact of channel transmission on modulation symbols. The description will be given using the example of a first receiving end obtaining a first modulation symbol sequence based on a third signal. The implementation of step 1308 can be similar to that of step 1208 and will not be repeated here. The order of steps 1307 and 1308 is not limited.

[0350] 1309. The first receiving end demodulates the first modulation symbol sequence to obtain a first bit sequence.

[0351] 1310. The second receiving end is charged using the third signal.

[0352] Step 1310 is optional.

[0353] 1311. The second receiving end obtains a second modulation symbol sequence based on the position of the modulation symbols in the third modulation symbol block carried by the subcarriers including the time-frequency resources occupied by the third signal in the second modulation symbol sequence, and the position of the modulation symbols in the fourth modulation symbol block in the second modulation symbol sequence.

[0354] This embodiment of the present application does not consider the impact of channel transmission on modulation symbols. The description will be based on an example in which the second receiving end obtains a second modulation symbol sequence based on the third signal. The implementation of step 1311 can be similar to the implementation of step 1211 and will not be repeated here. The order of steps 1308 and 1311 is not limited.

[0355] 1312. The second receiving end demodulates the second modulation symbol sequence to obtain a second bit sequence.

[0356] In an embodiment of the present application, the transmitting end sends the second information to the first receiving end, and sends the third information to the second receiving end; the transmitting end can flexibly adjust the time-frequency resources occupied by the subcarriers of the sending group of simultaneous digital energy transmission signals according to its own needs, and the position of the modulation symbols carried by the subcarriers in the modulation symbol sequence. The transmitting end sends a group of simultaneous digital energy transmission signals to multiple receiving ends at the same time, which can improve resource utilization. The transmitting end sends multiple signals with lower PAPR, instead of directly sending a signal with higher PAPR; it can achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance.

[0357] The following describes a scheme for simultaneous digital and energy signal generation and transmission provided by the present application for a multi-station scenario (i.e., a scenario in which multiple transmitters jointly send data / signaling to the same receiver). Figure 14 is a flow chart of another communication method provided by an embodiment of the present application. The method flow in Figure 14 is a possible implementation of the method described in Figure 4. Figure 14 describes the operation of the signal sent by the first transmitter and the second transmitter being used by the receiver for charging and obtaining information after being transmitted through the channel, wherein the transmitter in Figure 4 is the first transmitter in Figure 14. As shown in Figure 14, the method includes:

[0358] 1401. A first transmitting end and a second transmitting end determine, as determined through negotiation, a set of subcarriers to be occupied by each of them in a group of time-frequency resources occupied by a digital simultaneous transmission signal.

[0359] The subcarrier set can be replaced by a subcarrier range. In an embodiment of the present application, a first transmitting end and a second transmitting end jointly transmit a set of simultaneous transmission signals to the same receiving end, wherein each of the p signals sent by the first transmitting end carries one OFDM symbol, and each of the q signals sent by the second transmitting end carries one OFDM symbol, and each signal sent by the first transmitting end and each signal sent by the second transmitting end occupy the same time-frequency resources. Both p and q are integers greater than 0. For ease of understanding, the embodiment of the present application is described by taking p equal to 2 and q equal to 2 as an example; wherein, the first transmitting end sends the first signal and the second signal, and the second transmitting end sends signal #3 and signal #4, the first signal carries the first OFDM symbol, the second signal carries the second OFDM symbol, signal #3 carries the third OFDM symbol, and signal #4 carries the fourth OFDM symbol, the first OFDM symbol carries the first modulation symbol block, the second OFDM symbol carries the second modulation symbol block, the third OFDM symbol carries the third modulation symbol block, and the fourth OFDM symbol carries the fourth modulation symbol block, and the intersection of the sets of any two corresponding subcarriers in the first modulation symbol block, the second modulation symbol block, the third modulation symbol block, and the fourth modulation symbol block is an empty set. Since the signal sent by the first transmitting end and the signal sent by the second transmitting end occupy the same time-frequency resource, the signal sent by the first transmitting end and the signal sent by the second transmitting end need to occupy different subcarriers in the time-frequency resource. In order to make the signal sent by the first transmitting end and the signal sent by the second transmitting end occupy different subcarriers in the same time-frequency resource, the first transmitting end and the second transmitting end determine, such as negotiated, a set of subcarriers respectively occupied by the subcarriers included in the time-frequency resources occupied by a group of simultaneous transmitted signals.

[0360] In one possible implementation, the first receiving end sends fourth information to the second receiving end, and the fourth information is used to request to occupy the first subcarrier set in the above-mentioned time-frequency resources; the second receiving end, if it agrees with the first receiving end to occupy the first subcarrier set in the above-mentioned time-frequency resources, sends fifth information to the second receiving end, and the fifth information is used to indicate that the second receiving end agrees with the first receiving end to occupy the first subcarrier set in the above-mentioned time-frequency resources, and the fifth information can also be used to indicate that the second receiving end occupies the second subcarrier set in the above-mentioned time-frequency resources; if the second receiving end disagrees with the first receiving end occupying the first subcarrier set in the above-mentioned time-frequency resources, it sends sixth information to the second receiving end, and the sixth information is used to indicate that the second receiving end disagrees with the first receiving end occupying the first subcarrier set in the above-mentioned time-frequency resources, and indicates that the first receiving end is allowed to occupy a third subcarrier set among the subcarriers included in the above-mentioned time-frequency resources; the first receiving end determines to occupy the third subcarrier set among the subcarriers included in the above-mentioned time-frequency resources based on the sixth information. The first transmitting end and the second transmitting end can also determine the subcarrier set they each occupy in the subcarriers included in the time-frequency resources occupied by a group of simultaneous digital transmission signals in other ways, which is not limited in this application.

[0361] 1402. The first sending end sends first indication information to the receiving end.

[0362] Correspondingly, the receiving end receives the first indication information from the first transmitting end. The first indication information is used by the receiving end to determine the numbers of multiple first subcarriers in the subcarriers included in the above-mentioned time-frequency resources that carry the modulation symbols in the first modulation symbol block and the positions of the modulation symbols carried by the above-mentioned multiple first subcarriers in the above-mentioned first modulation symbol sequence. The first indication information is also used by the receiving end to determine the numbers of multiple second subcarriers in the subcarriers included in the above-mentioned time-frequency resources that carry the modulation symbols in the second modulation symbol block and the positions of the modulation symbols carried by the above-mentioned multiple second subcarriers in the above-mentioned first modulation symbol sequence.

[0363] 1403. The second sending end sends second indication information to the receiving end.

[0364] Correspondingly, the receiving end receives the second indication information from the second transmitting end. The second indication information is used by the receiving end to determine the numbers of multiple third subcarriers carrying the modulation symbols in the third modulation symbol block included in the above-mentioned time-frequency resources and the positions of the modulation symbols carried by the above-mentioned multiple third subcarriers in the above-mentioned first modulation symbol sequence. The second indication information is also used by the receiving end to determine the numbers of multiple fourth subcarriers carrying the modulation symbols in the fourth modulation symbol block included in the above-mentioned time-frequency resources and the positions of the modulation symbols carried by the above-mentioned multiple fourth subcarriers in the above-mentioned first modulation symbol sequence. The order of step 1402 and step 1403 is not limited.

[0365] 1404. The first transmitting end generates a first signal and a second signal.

[0366] In one possible implementation, the first transmitting end modulates a bit sequence to obtain a first modulation symbol sequence; splits the first modulation symbol sequence into a first subsequence (i.e., the above-mentioned first modulation symbol block), a second subsequence (i.e., the above-mentioned second modulation symbol block), a third subsequence (i.e., the above-mentioned third modulation symbol block) and a fourth subsequence (i.e., the above-mentioned fourth modulation symbol block); the first transmitting end maps the modulation symbols contained in the first subsequence to a first group of subcarriers (i.e., multiple first subcarriers) included in the time-frequency resources occupied by a group of digital simultaneous transmission signals, to obtain a first OFDM symbol; maps the modulation symbols contained in the second subsequence to a second group of subcarriers (i.e., multiple second subcarriers) included in the time-frequency resources, to obtain a second OFDM symbol; generates a first signal based on the first OFDM symbol, and generates a second signal based on the second OFDM symbol.

[0367] 1405. The first transmitting end sends a first signal and a second signal.

[0368] The first signal and the second signal are sent through different antenna port groups. The PAPR of the first signal and the PAPR of the second signal are both lower than a preset threshold.

[0369] 1406. The second transmitting end generates signal #3 and signal #4.

[0370] In one possible implementation, the second transmitting end modulates a bit sequence to obtain a first modulation symbol sequence; splits the first modulation symbol sequence into a first subsequence, a second subsequence, a third subsequence, and a fourth subsequence; the second transmitting end maps the modulation symbols contained in the third subsequence to a third group of subcarriers (i.e., multiple third subcarriers) included in the time-frequency resources occupied by a group of simultaneous digital transmission signals transmitted by the second transmitting end to obtain a third OFDM symbol; maps the modulation symbols contained in the fourth subsequence to a fourth group of subcarriers (i.e., multiple fourth subcarriers) included in the time-frequency resources to obtain a fourth OFDM symbol; generates signal #3 based on the second OFDM symbol, and generates signal #4 based on the fourth OFDM symbol. The bit sequence in step 1406 is the same as the bit sequence in step 1404, and the first modulation symbol sequence in step 1406 is the same as the first modulation symbol sequence in step 1404. In one possible implementation, the first transmitting end and the second transmitting end determine through negotiation that the first transmitting end sends a part of the above-mentioned bit sequence (corresponding to the above-mentioned first subsequence and the above-mentioned second subsequence), and determine that the first transmitting end sends another part of the above-mentioned bit sequence (corresponding to the above-mentioned third subsequence and the above-mentioned third subsequence).

[0371] 1407. The second transmitting end sends signal #3 and signal #4.

[0372] The manner in which the second transmitting end generates and transmits signal #3 and signal #4 can be seen in steps 803 to 806 of Figure 8 . The PAPR of signal #3 and signal #4 are both below a preset threshold. Accordingly, the receiving end receives the third signal. The third signal can be a set of simultaneous digital transmission signals (including the first signal, signal #3, the second signal, and signal #4) sent by the transmitting end and received by the receiving end. The PAPR of the third signal is above the preset threshold.

[0373] It can be understood that in this embodiment, the first transmitting end and the second transmitting end modulate the same bit sequence, and after obtaining the first modulation symbol sequence, the first modulation symbol sequence is split, and the first transmitting end sends part of the first modulation symbol sequence, and the second transmitting end sends another part of the first modulation symbol sequence.

[0374] In addition, in the present application, when two or more transmitting ends send different signals to the same receiving end, these signals may correspond to information of the same logical channel or physical channel, or may correspond to information of different logical channels or physical channels. In one possible implementation, the first signal, the second signal, signal #3, and signal #4 all correspond to information of the same logical channel or physical channel. In other words, the first modulation symbol block, the second modulation symbol block, the third modulation symbol block, and the fourth modulation symbol block correspond to information of the same logical channel or physical channel. In one possible implementation, the first signal and the second signal correspond to information of the first logical channel or physical channel, signal #3 and signal #4 correspond to information of the second logical channel or physical channel, the first logical channel and the second logical channel are different, and / or the first physical channel and the second physical channel are different. In other words, the first modulation symbol block and the second modulation symbol block correspond to the first logical channel or physical channel, the third modulation symbol block and the fourth modulation symbol block correspond to the second logical channel or physical channel, the first logical channel and the second logical channel are different, and / or the first physical channel and the second physical channel are different.

[0375] 1408. The receiving end uses the third signal to charge.

[0376] 1409. The receiving end obtains a first modulation symbol sequence based on the first indication information, the second indication information and the third signal.

[0377] 1410. The receiving end demodulates the first modulation symbol sequence to obtain a bit sequence.

[0378] In this embodiment of the present application, the first and second transmitting ends jointly transmit a set of simultaneous digital and energy transmission signals to the same receiving end. The PAPR of the third signal received by the receiving end is higher than a preset threshold, resulting in high energy charging efficiency. The PAPR of the signal sent by the first transmitting end and the signal sent by the second transmitting end are both lower than the preset threshold, rather than the transmitting end directly sending a single signal with a higher PAPR. This allows for the coexistence of wireless energy transmission and data transmission while balancing energy charging efficiency and data demodulation performance.

[0379] FIG15 is a flow chart of another communication method provided by an embodiment of the present application. FIG15 describes the operation in which a signal sent by a first transmitting end and a signal sent by a second transmitting end are transmitted through a channel and then used by a receiving end to charge and obtain information, wherein the first transmitting end is the transmitting end in FIG4. As shown in FIG15, the method includes:

[0380] 1501. A first transmitting end and a second transmitting end determine, as determined through negotiation, a set of subcarriers to be occupied by each of them in a group of time-frequency resources occupied by a digital simultaneous transmission signal.

[0381] For step 1501 , please refer to step 1401 in FIG. 14 .

[0382] 1502. The first transmitting end and the second transmitting end determine to use the first receiving end as a master station.

[0383] The master station here can send indication information to the receiving end to indicate the subcarrier set occupied by each transmitting end in the subcarriers included in the above time-frequency resources. Exemplarily, the first transmitting end and the second transmitting end use the first transmitting end with better signal quality with the receiving end as the master station.

[0384] 1503. The first sending end sends third indication information to the receiving end.

[0385] Correspondingly, the receiving end receives the third indication information from the first transmitting end. The third indication information is used by the receiving end to determine the numbers of multiple first subcarriers carrying the modulation symbols in the first modulation symbol block, the numbers of multiple second subcarriers carrying the modulation symbols in the second modulation symbol block, the numbers of multiple third subcarriers carrying the modulation symbols in the third modulation symbol block, the numbers of multiple fourth subcarriers carrying the modulation symbols in the fourth modulation symbol block, the positions of the modulation symbols carried by the multiple first subcarriers in the first modulation symbol sequence, the positions of the modulation symbols carried by the multiple second subcarriers in the first modulation symbol sequence, the positions of the modulation symbols carried by the multiple third subcarriers in the first modulation symbol sequence, and the positions of the modulation symbols carried by the multiple fourth subcarriers in the first modulation symbol sequence.

[0386] 1504. The first transmitting end generates a first signal and a second signal.

[0387] Steps 1504 to 1508 may refer to steps 1404 to 1408 in FIG. 14 .

[0388] 1505. The first transmitting end sends a first signal and a second signal.

[0389] 1506. The second transmitting end generates signal #3 and signal #4.

[0390] 1507. The second transmitting end sends signal #3 and signal #4.

[0391] 1508. The receiving end uses the third signal to charge.

[0392] 1509. The receiving end obtains a first modulation symbol sequence based on the third indication information and the third signal.

[0393] 1510. The receiving end demodulates the first modulation symbol sequence to obtain a bit sequence.

[0394] In this embodiment of the present application, the first and second transmitting ends jointly transmit a set of simultaneous digital and energy transmission signals to the same receiving end. The PAPR of the third signal received by the receiving end is higher than a preset threshold, resulting in high energy charging efficiency. The PAPR of the signal sent by the first transmitting end and the signal sent by the second transmitting end are both lower than the preset threshold, rather than the transmitting end directly sending a single signal with a higher PAPR. This allows for the coexistence of wireless energy transmission and data transmission while balancing energy charging efficiency and data demodulation performance.

[0395] FIG16 is a flow chart of another communication method provided by an embodiment of the present application. The method flow of FIG16 can be applied to a scenario where multiple transmitting terminals send simultaneous digital signals to multiple receiving terminals. The method flow of FIG16 is a possible implementation of the method described in FIG4. As shown in FIG16, the method includes:

[0396] 1601. A first transmitting end and a second transmitting end determine, as determined through negotiation, a set of subcarriers to be occupied by each of them in a group of time-frequency resources occupied by a digital simultaneous transmission signal.

[0397] Step 1601 may refer to step 1401 in FIG. 14 .

[0398] 1602. The first sending end sends fourth indication information to the first receiving end.

[0399] Correspondingly, the first receiving end receives the fourth indication information from the first transmitting end. The fourth indication information is used by the first receiving end to determine the numbers of multiple first subcarriers carrying the modulation symbols in the first modulation symbol block among the subcarriers included in the above-mentioned time-frequency resources and the positions of the modulation symbols carried by the above-mentioned multiple first subcarriers in the first modulation symbol sequence. The fourth indication information is also used by the first receiving end to determine the numbers of multiple second subcarriers carrying the modulation symbols in the second modulation symbol block among the subcarriers included in the above-mentioned time-frequency resources and the positions of the modulation symbols carried by the above-mentioned multiple second subcarriers in the above-mentioned first modulation symbol sequence.

[0400] 1603. The second sending end sends fifth indication information to the second receiving end.

[0401] Correspondingly, the second receiving end receives the fifth indication information from the second transmitting end. The fifth indication information is used by the second receiving end to determine the numbers of multiple third subcarriers carrying the modulation symbols in the third modulation symbol block among the subcarriers included in the above-mentioned time-frequency resources and the positions of the modulation symbols carried by the above-mentioned multiple third subcarriers in the second modulation symbol sequence. The fifth indication information is also used by the second receiving end to determine the numbers of multiple fourth subcarriers carrying the modulation symbols in the fourth modulation symbol block among the subcarriers included in the above-mentioned time-frequency resources and the positions of the modulation symbols carried by the above-mentioned multiple fourth subcarriers in the above-mentioned second modulation symbol sequence. The order of step 1602 and step 1603 is not limited.

[0402] In one possible implementation, steps 1602 to 1603 are replaced by: the first transmitting end and the second transmitting end determine to use the first receiving end as the master station; the first transmitting end sends the above-mentioned fourth indication information to the first receiving end, and sends the above-mentioned fifth indication information to the second receiving end.

[0403] 1604. The first transmitting end generates a first signal and a second signal.

[0404] In one possible implementation, a first transmitting end modulates a first bit sequence to obtain a first modulation symbol sequence; splits the first modulation symbol sequence into a first subsequence and a second subsequence; the first transmitting end maps the modulation symbols contained in the first subsequence to a first group of subcarriers (i.e., multiple first subcarriers) included in the time-frequency resources occupied by a group of digital simultaneous transmission signals transmitted by the first transmitting end to obtain a first OFDM symbol; maps the modulation symbols contained in the second subsequence to a second group of subcarriers (i.e., multiple second subcarriers) included in the time-frequency resources to obtain a second OFDM symbol; generates a first signal based on the first OFDM symbol, and generates a second signal based on the second OFDM symbol. The first subsequence is an example of the first modulation symbol block described above, and the second subsequence is an example of the second modulation symbol block described above.

[0405] 1605. The first transmitting end sends a first signal and a second signal.

[0406] The first signal and the second signal are sent through different antenna port groups. The PAPR of the first signal and the PAPR of the second signal are both lower than a preset threshold.

[0407] 1606. The second transmitting end generates signal #3 and signal #4.

[0408] In one possible implementation, the second transmitting end modulates the second bit sequence to obtain a second modulation symbol sequence; splits the second modulation symbol sequence into a third subsequence and a fourth subsequence; the second transmitting end maps the modulation symbols contained in the third subsequence to a third group of subcarriers (i.e., multiple third subcarriers) included in the time-frequency resources occupied by a group of digital simultaneous transmission signals transmitted by it, to obtain a third OFDM symbol; maps the modulation symbols contained in the fourth subsequence to a fourth group of subcarriers (i.e., multiple fourth subcarriers) included in the time-frequency resources, to obtain a fourth OFDM symbol; generates signal #3 based on the third OFDM symbol, and generates signal #4 based on the fourth OFDM symbol. The first signal, the second signal, signal #3, and signal #4 occupy the same time-frequency resources. The third subsequence is an example of the above-mentioned third modulation symbol block, and the fourth subsequence is an example of the above-mentioned fourth modulation symbol block.

[0409] 1607. The second transmitting end sends signal #3 and signal #4.

[0410] The manner in which the second transmitting end generates and transmits signal #3 and signal #4 can be seen in steps 803 to 806 of Figure 8 . The PAPR of signal #3 and the PAPR of signal #4 are both below a preset threshold. Accordingly, both the first receiving end and the second receiving end receive the third signal. The third signal can be a set of simultaneous digital transmission signals (including the first signal, the second signal, signal #3, and signal #4) jointly transmitted by the first transmitting end and the second transmitting end, and received by the first receiving end and the second receiving end. The PAPR of the third signal is above the preset threshold.

[0411] 1608. The first receiving end is charged using the third signal.

[0412] 1609. The first receiving end obtains a first modulation symbol sequence based on the fourth indication information and the third signal.

[0413] The embodiment of the present application does not consider the impact of channel transmission on modulation symbols, and is described by taking the example of a first receiving end obtaining a first modulation symbol sequence based on the fourth indication information and the third signal.

[0414] 1610. The first receiving end demodulates the first modulation symbol sequence to obtain a first bit sequence.

[0415] 1611. The second receiving end is charged using the third signal.

[0416] 1612. The second receiving end obtains a second modulation symbol sequence based on the fifth indication information and the third signal.

[0417] The embodiment of the present application does not consider the impact of channel transmission on modulation symbols, and is described by taking the example of the second receiving end obtaining the second modulation symbol sequence based on the fifth indication information and the third signal.

[0418] 1613. The second receiving end demodulates the second modulation symbol sequence to obtain a second bit sequence.

[0419] In this embodiment of the present application, the first transmitting end and the second transmitting end jointly transmit a set of simultaneous digital and energy transmission signals. The PAPR of the third signal received by the first receiving end and the second receiving end is higher than a preset threshold, and the charging efficiency is high. The PAPR of the signal sent by the first transmitting end and the signal sent by the second transmitting end are both lower than the preset threshold, rather than the transmitting end directly sending a signal with a higher PAPR. This can achieve the coexistence of wireless energy transmission and data transmission while taking into account both charging efficiency and data demodulation performance.

[0420] The following describes the structure of a communication device that can implement the communication method provided in the embodiments of the present application in conjunction with the accompanying drawings. The following only briefly describes the communication device. For details on the implementation of the solution, please refer to the description of the method embodiment above, which will not be repeated below.

[0421] Figure 17 is a schematic diagram of the structure of a communication device 1700 provided in an embodiment of the present application. The communication device 1700 can implement the functions or steps implemented by the transmitting end in each of the above-mentioned method embodiments, and can also implement the functions or steps implemented by the receiving end in each of the above-mentioned method embodiments. The communication device may include a processing module 1710 and a transceiver module 1720. In one possible implementation, it may also include a storage unit, which can be used to store instructions (code or program) and / or data. The processing module 1710 and the transceiver module 1720 can be coupled to the storage unit. For example, the processing module 1710 can read the instructions (code or program) and / or data in the storage unit to implement the corresponding method. The above-mentioned units can be set independently or partially or fully integrated. For example, the transceiver module 1720 may include a transmitting module and a receiving module. The transmitting module can be a transmitter, and the receiving module can be a receiver. The entity corresponding to the transceiver module 1720 can be a transceiver circuit, such as a transceiver or a communication interface.

[0422] In some possible implementations, the communication device 1700 can implement the corresponding behaviors and functions of the transmitting end in the above-mentioned method embodiments. For example, the communication device 1700 can be a transmitting end, or it can be a component (such as a chip or circuit) used in the transmitting end. The transceiver module 1720 can be used to perform all receiving or transmitting operations performed by the transmitting end in the embodiments of Figures 4, 6, 8, and 10-16. The processing module 1710 can be used to perform all operations performed by the transmitting end in the embodiments of Figures 4, 6, 8, and 10-16 except for the transmitting and receiving operations.

[0423] In some possible implementations, the communication device 1700 can implement the corresponding behaviors and functions of the receiving end in the above-mentioned method embodiments. For example, the communication device 1700 can be a receiving end, or it can be a component (such as a chip or circuit) used in the receiving end. The transceiver module 1720 can be used to perform all receiving or sending operations performed by the receiving end in the embodiments of Figures 4, 6, 8, and 10-16. The processing module 1710 can be used to perform all operations performed by the receiving end in the embodiments of Figures 4, 6, 8, and 10-16 except for the transceiver operations.

[0424] Figure 18 is a schematic diagram of the structure of another device 180 provided in an embodiment of the present application. The device in Figure 18 can be the aforementioned transmitter or a chip for the transmitter, or the aforementioned receiver or a chip for the receiver. As shown in Figure 18, the device 180 includes a processing circuit 1810 and a transceiver circuit 1820.

[0425] In some embodiments of the present application, the processing circuit 1810 and the transceiver circuit 1820 may be configured to execute functions or operations performed by the transmitting end. The transceiver circuit 1820 may, for example, be configured to execute all receiving or transmitting operations performed by the transmitting end in the embodiments of Figures 4, 6, 8, and 10-16. The processing circuit 1810 may, for example, be configured to execute all operations performed by the transmitting end in the embodiments of Figures 4, 6, 8, and 10-16 except for the transceiver operations.

[0426] In some embodiments of the present application, the processing circuit 1810 and the transceiver circuit 1820 may be configured to execute functions or operations performed by the receiving end. The transceiver circuit 1820 may, for example, be configured to execute all receiving or transmitting operations performed by the receiving end in the embodiments of Figures 4, 6, 8, and 10-16. The processing circuit 1810 may, for example, be configured to execute all operations performed by the receiving end in the embodiments of Figures 4, 6, 8, and 10-16 except for the transceiver operations.

[0427] In one possible implementation, the device is the aforementioned transmitting end or receiving end, the transceiver circuit 1820 includes at least one transceiver, and the processing circuit 1810 includes at least one processor, or a circuit for processing or control in at least one processor.

[0428] The transceiver is used to communicate with other devices / apparatuses via a transmission medium. The processor uses the transceiver to send and receive data and / or signaling, and is used to implement the method in the above-mentioned method embodiment. The processor can implement the functions of the processing module 1710, and the transceiver can implement the functions of the transceiver module 1720. Optionally, the transceiver may include a radio frequency circuit and an antenna, and the radio frequency circuit is mainly used for converting baseband signals into radio frequency signals and processing radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc. are mainly used to receive data input by users and output data to users.

[0429] Optionally, device 180 may further include at least one memory for storing program instructions and / or data. The memory and processor are coupled. Coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be electrical, mechanical, or other forms, and is used for information exchange between devices, units, or modules. The processor may operate in conjunction with the memory. The processor may execute program instructions stored in the memory. At least one of the at least one memory may be included in the processor.

[0430] The processor can read software programs in the memory, execute the instructions of the software programs, and process the data of the software programs. When data needs to be transmitted wirelessly, the processor performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves via the antenna. When data is sent to device 180, the radio frequency circuit receives the radio frequency signal via the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data.

[0431] In another implementation, the above-mentioned RF circuit and antenna can be set independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna can be arranged independently of the device 180 in a remote manner.

[0432] The specific connection medium between the above-mentioned transceiver, processor and memory is not limited in the embodiments of the present application.

[0433] In the embodiments of the present application, the processor may be one of the following devices: a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or all or part of the circuits used for processing functions in the aforementioned devices, which may implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0434] In one possible implementation, the device is a chip for the above-mentioned transmitting end or receiving end, the processing circuit 1810 includes at least one logic circuit, and the transceiver circuit 1820 includes at least one interface. The processing module 1710 in Figure 17 can be implemented using a logic circuit, and the transceiver module 1720 in Figure 17 can be implemented using an interface. The logic circuit can be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, etc., and the interface can be a communication interface, an input / output interface, etc. In the embodiment of the present application, the logic circuit and the interface can also be coupled to each other. The embodiment of the present application does not limit the specific connection method of the logic circuit and the interface.

[0435] The present application also provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is executed on a computer, the computer executes the method of the above embodiment.

[0436] The present application also provides a computer program product, which includes instructions or a computer program. When the instructions or the computer program are run on a computer, the method in the above embodiment is executed.

[0437] The present application also provides a communication system, comprising the above-mentioned transmitting end and the above-mentioned receiving end.

[0438] The present application also provides a communication system, comprising the above-mentioned transmitting end, the above-mentioned first receiving end and the above-mentioned second receiving end.

[0439] The present application also provides a communication system, comprising the first transmitting end, the second transmitting end and the receiving end.

[0440] The present application also provides a communication system, comprising the first transmitting end, the second transmitting end, the first receiving end and the second receiving end.

[0441] The present application also provides a chip, which includes: a communication interface and a processor; the communication interface is used for sending and receiving signals of the above-mentioned chip; the processor is used to execute computer program instructions so that the communication device including the above-mentioned chip executes the method in the above-mentioned embodiment.

[0442] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0443] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

Claims

1. A communication method, characterized in that, Including: Receiving a third signal, where the third signal includes a first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol. The first OFDM symbol and the second OFDM symbol occupy the same time-frequency resources. The first OFDM symbol carries a first modulation symbol block, and the second OFDM symbol carries a second modulation symbol block. The set of subcarriers corresponding to the modulation symbols in the first modulation symbol block is a part of the subcarriers included in the time-frequency resources, and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is a part of the subcarriers included in the time-frequency resources. Moreover, the intersection of the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is an empty set. Both the first modulation symbol block and the second modulation symbol block carry at least one of data information and control information. Using the third signal for energy charging. Based on the third signal, obtaining a bit sequence, where the bit sequence includes the data information or control information carried by the first modulation symbol block.

2. The method according to claim 1, wherein The modulation symbol sequence corresponding to the first modulation symbol block and the modulation symbol sequence corresponding to the second modulation symbol block are both parts of a first modulation symbol sequence, or the modulation symbol sequence corresponding to the first modulation symbol block and the modulation symbol sequence corresponding to the second modulation symbol block both correspond to a first logical channel or physical channel.

3. The method according to claim 1 or 2, characterized in that, The bit sequence further includes the data information or control information carried by the second modulation symbol block, and the bit sequence corresponding to the first modulation symbol block and the bit sequence corresponding to the second modulation symbol block are both parts of the bit sequence.

4. The method according to any one of claims 1-3, characterized in that The modulation symbols corresponding to the bit sequence are all or part of the modulation symbols carried by the subcarriers included in the time-frequency resources.

5. The method according to claim 2 or 3, characterized in that, The obtaining the bit sequence based on the third signal includes: Based on the third signal and the positions of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence, obtaining the bit sequence. The modulation symbols carried by the subcarriers included in the time-frequency resources include the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: Receiving a first piece of information. Based on the first piece of information, determining the positions of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence.

7. The method according to claim 5, characterized in that, The first piece of information includes a first index value, and the first index value is used to indicate the positions of the modulation symbols carried by the subcarriers included in the time-frequency resources in the first modulation symbol sequence respectively. Or, the first index value is used to indicate at least one of the numbers of a plurality of first subcarriers carrying the modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resources and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence.

8. The method according to claim 5, characterized in that The first information includes a first transmission parameter, and the first transmission parameter is used for determining at least one of the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence, respectively.

9. The method according to claim 8, characterized in that The first transmission parameter includes at least one of the number of the plurality of first subcarriers and an order parameter, and the order parameter is used for determining the positions of the modulation symbols in the first modulation symbol block in the first modulation symbol sequence.

10. The method according to claim 9, wherein The first transmission parameter further includes numbering information, and the numbering information and the number of the plurality of first subcarriers are used for determining the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource.

11. The method according to claim 1, wherein The method further includes: Receiving first indication information from a first transmitting end; Based on the first indication information, determining the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence, respectively.

12. The method according to claim 3, characterized in that The method further includes; Receiving first indication information from a first transmitting end; Based on the first indication information, determining the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence, respectively; Receiving second indication information from a second transmitting end; Based on the second indication information, determining the numbers of a plurality of second subcarriers that carry modulation symbols in the second modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of second subcarriers in the first modulation symbol sequence, respectively.

13. The method according to claim 12, characterized in that, The first indication information includes a second index value, and the second index value is used for indicating at least one of the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence, respectively.

14. The method according to claim 12, wherein The first indication information includes a second transmission parameter, and the second transmission parameter is used for determining at least one of the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence, respectively; the second transmission parameter includes at least one of the number of the plurality of first subcarriers and an order parameter, and the order parameter is used for determining the positions of the modulation symbols in the first modulation symbol block in the first modulation symbol sequence.

15. The method according to any one of claims 12 to 14, characterized in that The second indication information includes a third index value, and the third index value is used to indicate at least one of the numbers of a plurality of second subcarriers that carry modulation symbols in the second modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of second subcarriers in the first modulation symbol sequence, respectively.

16. The method according to any one of claims 12 to 14, characterized in that The second indication information includes a third transmission parameter, and the third transmission parameter is used for determining at least one of the numbers of a plurality of second subcarriers that carry modulation symbols in the second modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of second subcarriers in the first modulation symbol sequence, respectively; the third transmission parameter includes at least one of the number of the plurality of second subcarriers and an order parameter, and the order parameter is used for determining the positions of the modulation symbols in the second modulation symbol block in the first modulation symbol sequence.

17. The method according to any one of claims 1 to 16, characterized in that, Obtaining a bit sequence based on the third signal includes: Obtaining the bit sequence based on the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence, respectively, where the first modulation symbol block is obtained based on the first modulation symbol sequence.

18. The method according to claim 17, wherein Before obtaining the bit sequence based on the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence, respectively, the method further includes: Receiving second information; and determining, based on the second information, the positions of the modulation symbols in the first modulation symbol block carried by the subcarriers included in the time-frequency resource in the first modulation symbol sequence.

19. The method according to claim 18, characterized in that, The second information includes a second index value, and the second index value is used to indicate at least one of the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence, respectively.

20. The method according to claim 18, wherein The second information includes a second transmission parameter, and the second transmission parameter is used for determining at least one of the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence, respectively; the second transmission parameter includes at least one of the number of the plurality of first subcarriers and an order parameter, and the order parameter is used for determining the positions of the modulation symbols in the first modulation symbol block in the first modulation symbol sequence.

21. The method according to any one of claims 1 to 20, characterized in that, The peak-to-average power ratio PAPR of the third signal is higher than a preset threshold.

22. A communication method, characterized in that, Including: Generate a first signal and a second signal, where the first signal carries a first orthogonal frequency division multiplexing (OFDM) symbol, the second signal carries a second OFDM symbol, the first OFDM symbol and the second OFDM symbol occupy the same time-frequency resources, the first OFDM symbol carries a first modulation symbol block, the second OFDM symbol carries a second modulation symbol block, the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block is a part of the subcarriers included in the time-frequency resources, the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is a part of the subcarriers included in the time-frequency resources, and the intersection of the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is an empty set. Both the first modulation symbol block and the second modulation symbol block carry at least one of data information and control information; Transmit the first signal and the second signal.

23. The method according to claim 22, wherein The first signal corresponds to a first antenna port group, the second signal corresponds to a second antenna port group. The first antenna port group includes one or more first antenna ports, the second antenna port group includes one or more second antenna ports, and the first antenna ports and the second antenna ports are different.

24. The method according to claim 22, wherein The first signal and the second signal correspond to different radio frequency channels.

25. The method according to any one of claims 22 to 24, characterized in that, The first signal and the second signal are used for energy charging.

26. The method according to any one of claims 22 to 25, characterized in that, The peak-to-average power ratio (PAPR) of the first signal and the PAPR of the second signal are both lower than a preset threshold.

27. The method according to any one of claims 22 to 26, characterized in that, Among the subcarriers included in the time-frequency resources, at most h subcarriers carry the modulation symbols in the first modulation symbol block, h is equal to (n / m + r) or the ceiling of (n / m + r), m is an integer greater than 1 and m is less than or equal to the number of available antenna port groups of the time-frequency resources, r is an integer greater than or equal to 0, n is the total number of subcarriers included in the time-frequency resources, and the antenna port group corresponding to the time-frequency resources includes the first antenna port group and the second antenna port group.

28. The method according to any one of claims 22 to 27, characterized in that, The modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block are obtained based on the same bit sequence, or the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block are obtained based on bit sequences to be sent to different receiving ends.

29. The method according to any one of claims 22 to 28, characterized in that, The first OFDM symbol further carries a third modulation symbol block, and the third modulation symbol block and the first modulation symbol block are obtained based on bit sequences to be sent to different receiving ends.

30. The method according to any one of claims 22 to 29, characterized in that, The modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block are obtained based on the same bit sequence; the method further includes: Transmit first information, where the first information is used to determine the positions of the modulation symbols carried by the subcarriers included in the time-frequency resources in a first modulation symbol sequence. The modulation symbols carried by the subcarriers included in the time-frequency resources include the modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block, and the first modulation symbol block and the second modulation symbol block are obtained based on the first modulation symbol sequence.

31. The method according to claim 30, wherein The first information includes a first index value, where the first index value is used to indicate the positions of the modulation symbols carried by the subcarriers included in the time-frequency resource in the first modulation symbol sequence respectively; or, the first index value is used to indicate at least one of the numbers of a plurality of first subcarriers that carry the modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence respectively.

32. The method according to claim 30, wherein The first information includes a first transmission parameter, where the first transmission parameter is used for at least one of determining the numbers of a plurality of first subcarriers that carry the modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and determining the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence respectively.

33. The method according to claim 32, wherein The first transmission parameter includes at least one of the number of the plurality of first subcarriers and an order parameter, where the order parameter is used for determining the positions of the modulation symbols in the first modulation symbol block in the first modulation symbol sequence.

34. The method according to claim 33, wherein The first transmission parameter further includes numbering information, where the numbering information and the number of the plurality of first subcarriers are used for determining the numbers of a plurality of first subcarriers that carry the modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource.

35. The method according to any one of claims 22 to 34, characterized in that, The modulation symbols in the first modulation symbol block and the modulation symbols in the second modulation symbol block are obtained based on bit sequences to be sent to different receiving ends; the method further includes: Sending second information, where the second information is used for determining the positions of the modulation symbols in the first modulation symbol block carried by the subcarriers included in the time-frequency resource in a first modulation symbol sequence, the first modulation symbol block is obtained based on the first modulation symbol sequence, and the first modulation symbol sequence is obtained based on the bit sequence to be sent to a first receiving end; sending third information, where the third information is used for determining the positions of the modulation symbols in the second modulation symbol block carried by the subcarriers included in the time-frequency resource in a second modulation symbol sequence, the second modulation symbol block is obtained based on the second modulation symbol sequence, and the second modulation symbol sequence is obtained based on the bit sequence to be sent to a second receiving end, and the second receiving end is different from the first receiving end.

36. The method according to claim 35, wherein The second information includes a second index value, where the second index value is used to indicate at least one of the numbers of a plurality of first subcarriers that carry the modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence respectively.

37. The method according to claim 35, wherein The second information includes second transmission parameters, where the second transmission parameters are used for at least one of determining the numbers of a plurality of first subcarriers that carry modulation symbols in the first modulation symbol block among the subcarriers included in the time-frequency resource and determining the positions of the modulation symbols carried by the plurality of first subcarriers in the first modulation symbol sequence respectively; the second transmission parameters include at least one of the number of the plurality of first subcarriers and an order parameter, and the order parameter is used for determining the positions of the modulation symbols in the first modulation symbol block in the first modulation symbol sequence.

38. The method according to any one of claims 22 to 37, characterized in that The method further includes: Obtaining a first modulation symbol sequence; Splitting the first modulation symbol sequence into v subsequences, where v is an integer greater than 1 and v is less than or equal to the number of antenna port groups available for the time-frequency resource. The v subsequences include a first subsequence and a second subsequence. The first subsequence corresponds to the first modulation symbol block, and the second subsequence corresponds to the second modulation symbol block; Obtaining the first OFDM symbol based on the first modulation symbol block and obtaining the second OFDM symbol based on the second modulation symbol block.

39. The method according to claim 38, wherein The splitting of the first modulation symbol sequence into v subsequences includes: Map the first modulation symbol sequence to v layers (spatial layers) to obtain the v sub-sequences, and the vectors corresponding to the v layers are x(i) = [x (0) (i), …, x (v-1) (i)], M symb is the length of the first modulation symbol sequence (i.e., the number of modulation symbols in the first modulation symbol sequence), v is an integer greater than 1, and the v layers correspond one-to-one with the v sub-sequences, x (0) (i) is the modulation symbol of the 0th layer, x (v-1) (i) is the modulation symbol of the (v - 1)th layer.

40. The method according to claim 39, wherein The first modulation symbol sequence and the vector x(i) corresponding to the v layers satisfy the following first mapping rule: Among them, d(vk) represents the (vk)-th modulation symbol in the first modulation symbol sequence, d(vk + 1) represents the (vk + 1)-th modulation symbol in the first modulation symbol sequence, d(vk + v - 1) represents the (vk + v - 1)-th modulation symbol in the first modulation symbol sequence, k is an integer greater than or equal to 0, and the value range of k is from 0 to ((M symb / v) - 1). The first mapping rule indicates that the (vk + j)-th modulation symbol in the first modulation symbol sequence is mapped to the (vk + j)-th symbol in the j-th layer. j is an integer greater than or equal to 0, x (0) (vk) represents the (vk)-th symbol in the 0-th layer, corresponding to the (vk)-th modulation symbol in the first modulation symbol sequence, x (1) (vk + 1) represents the (vk + 1)-th symbol in the 1-st layer, corresponding to the (vk + 1)-th modulation symbol in the first modulation symbol sequence, x (v-1) (vk + v - 1) represents the (vk + v - 1)-th symbol in the (v - 1)-th layer, corresponding to the (vk + v - 1)-th modulation symbol in the first modulation symbol sequence.

41. The method according to any one of claims 38 to 40, characterized in that, The obtaining of the first OFDM symbol based on the first modulation symbol block includes: Mapping the modulation symbols in the first modulation symbol block (antenna port mapping) to the first antenna port group; sequentially mapping the modulation symbols corresponding to the first antenna port group (mapping to resource blocks) to a plurality of subcarriers of the first antenna port group to obtain the first OFDM symbol.

42. The method according to any one of claims 38 to 40, characterized in that, The obtaining of the first OFDM symbol based on the first modulation symbol block includes: Map the vector [x (0) (i), …, x (v-1) (i)] corresponding to the v layers onto v antenna port groups. The vector [x (0) (i), …, x (v-1) (i)] corresponding to the v layers and the modulation symbols corresponding to the v antenna port groups satisfy the following second mapping rule: where x (0) (i) represents the i-th modulation symbol of the 0-th layer, Denote the i-th modulation symbol of antenna port group p0, x (v-1) (i) denote the i-th modulation symbol of the (v - 1)-th layer, Denote the i-th modulation symbol of antenna port group p v-1 The second mapping rule indicates that the i-th modulation symbol of the s-th layer is mapped to the i-th modulation symbol of antenna port group p s , where s is greater than or equal to 0 and less than or equal to (v - 1), and {p0, …, p v-1} is a set of antenna port groups Will Total The symbols are sequentially mapped to the corresponding p-th antenna port group in order subcarriers to obtain a first OFDM symbol, where p is greater than or equal to 0 and less than or equal to (v - 1).

43. The method according to claim 42, wherein The first modulation symbol sequence and the vector x(i) corresponding to the v layers satisfy the following third mapping rule: Where d(vi) represents the (vi)-th modulation symbol in the first modulation symbol sequence, d(vi+1) represents the (vi+1)-th modulation symbol in the first modulation symbol sequence, d(vi+v-1) represents the (vi+v-1)-th modulation symbol in the first modulation symbol sequence, i is an integer greater than or equal to 0, and the value range of i is from 0 to The third mapping rule indicates that the (vi + j)-th modulation symbol in the first modulation symbol sequence is mapped to the i-th symbol of the j-th layer, where j is an integer greater than or equal to 0, x (0) (i) represents the i-th symbol of the 0-th layer, corresponding to the (vi)-th modulation symbol in the first modulation symbol sequence, x (v-1) (i) represents the i-th symbol of the (v - 1)-th layer, corresponding to the (vi + v - 1)-th modulation symbol in the first modulation symbol sequence.

44. The method according to any one of claims 38 to 40, characterized in that, Obtaining the first OFDM symbol based on the first modulation symbol block includes: mapping the vector [x (0) (i), …, x (v-1) (i)] corresponding to the v layers to v antenna port groups, and the modulation symbols corresponding to the v antenna port groups and the vector [x (0) (i), …, x (v-1) (i)] corresponding to the v layers satisfy the following fourth mapping rule: where x (0) (i) represents the i-th modulation symbol of the 0-th layer, denotes the vi-th modulation symbol of antenna port group p0, x (v-1) (i) denotes the i-th modulation symbol of the (v - 1)-th layer, Indicates the (vi+v-1)th modulation symbol of antenna port group p v-1 , where i is an integer greater than or equal to 0 The fourth mapping rule indicates that the i-th modulation symbol in the s-th layer is mapped to the (vi + s)-th modulation symbol on the antenna port group p s , where s is greater than or equal to 0 and less than or equal to (v - 1), and {p0, …, p v-1} is a set of antenna port groups, Will Total Each symbol is sequentially mapped to the corresponding p-th antenna port group in order subcarriers to obtain a first OFDM symbol, where p is greater than or equal to 0 and less than or equal to (v - 1).

45. The method according to any one of claims 38 to 44, characterized in that, The method further includes: Sending fourth information, where the fourth information is used for determining a subcarrier set that carries the first modulation symbol block and the second modulation symbol block among the subcarriers included in the time-frequency resource.

46. A communication device, characterized in that, Includes a module for implementing the method according to any one of claims 1 to 21 or any one of claims 22 to 45.

47. A computer program product, characterized in that, When the computer program product runs on a computer, it causes the computer to execute the method according to any one of claims 1 to 45.

48. A computer-readable storage medium, characterized in that, A computer program or instruction is stored on the computer-readable storage medium. When the computer program or instruction runs on a computer, it causes the computer to execute the method according to any one of claims 1 to 45.

49. A chip, characterized in that, Includes: A communication interface and a processor; the communication interface is used for signal transceiver of the chip; the processor is used for executing the computer program or instruction, so that a communication device including the chip executes the method according to any one of claims 1 to 45.

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