Signal transmission method, signal reception method, and communication device

Abstract

The present application discloses a signal transmission method, a signal receiving method, and a communication apparatus. The method includes a first device transmitting a first signal to a second device for a first frequency domain unit and transmitting a second signal for a second frequency domain unit. The first frequency domain unit includes a first frequency, and the second frequency unit includes a second frequency. The absolute value of the difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is a bandwidth occupied by the first frequency domain unit in the frequency domain. The second bandwidth is a bandwidth occupied by the second frequency domain unit in the frequency domain. The third bandwidth is a bandwidth occupied by the third frequency domain unit in the frequency domain. The third frequency domain unit is used by the first device to transmit a third signal to a third device. The first signal, the second signal, and the third signal are in one operating band. In this way, interference can be suppressed without increasing the complexity of the radio frequency filters.

Description

[Technical Field]

[0001] Cross-references to related applications This application claims priority to Chinese Patent Application No. 202210351628.0, titled "SIGNAL SENDING METHOD, SIGNAL RECEIVING METHOD, AND COMMUNICATION APPARATUS," filed with the China National Intellectual Property Administration on 2 April 2022, which is incorporated herein by reference in its entirety.

[0002] This application relates to the field of radio frequency technology, and more particularly to signal transmission methods, signal reception methods, and communication devices. [Background technology]

[0003] To further reduce the receiver's power consumption, the received signal can be processed by amplitude modulation and envelope detection to avoid using high-power radio frequency modules. However, because envelope detection involves nonlinear components and is noisy, a radio frequency amplifier must be placed before the envelope detector to properly demodulate the received signal. Furthermore, the receiver needs to filter the received signal. Therefore, to achieve a good filtering effect, a radio frequency filter must be placed before the radio frequency amplifier, and a high Q value for the radio frequency filter is required. However, the Q value of on-chip radio frequency filters is typically low. If a high Q value for an on-chip radio frequency filter is expected, bulk acoustic wave (BAW) or surface acoustic wave (SAW) external connections are necessary. It is clear that the receiver's integration level is low, and the requirement for a small receiver size cannot be met. [Overview of the project]

[0004] This application provides a signal transmission method, a signal reception method, and a communication device for reducing interference between signals without increasing the complexity of the radio frequency filter in the receiver. [Means for solving the problem]

[0005] According to a first aspect, embodiments of the present application provide a signal transmission method. The method may be performed by a first communication device. The first communication device may be a communication device or a communication device, for example, a chip system capable of supporting the communication device in implementing the functions required in the method. The following description will be provided by using an example in which the communication device is the first device. For example, the first communication device is the first device, a chip placed on the first device, or another component configured to implement the functions of the first device. The method comprises: the first device determining a first signal and a second signal, transmitting the first signal to a second device to a first frequency domain unit, and transmitting the second signal to a second frequency domain unit. The first frequency domain unit comprises a first frequency, and the second frequency unit comprises a second frequency. The absolute value of the difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is the bandwidth occupied by the first frequency-domain unit in the frequency domain. The second bandwidth is the bandwidth occupied by the second frequency-domain unit in the frequency domain. The third bandwidth is the bandwidth occupied by the third frequency-domain unit in the frequency domain. The third frequency-domain unit is used by the first device to transmit the third signal to the third device. The first signal, the second signal, and the third signal are in a single operating bandwidth.

[0006] In this embodiment of the present application, a first device used as a transmitting end device can transmit two signals (e.g., a first signal and a second signal) at two frequency positions (e.g., a first frequency and a second frequency). For example, the first device can transmit a first signal at a first frequency position and a second signal at a second frequency position. In the case of a second device used as a receiving end, the radio frequency filter of the second device must allow both the first and second signals to pass through; in other words, the passband of the radio frequency filter must encompass both the first and second frequencies. A larger gap between the first and second frequencies indicates a lower requirement for the Q value of the radio frequency filter of the second device; in other words, a radio frequency filter with a higher Q value is not required. Therefore, according to the method in this embodiment of the present application, the complexity of designing and implementing the radio frequency filter cannot be increased. In addition, considering the presence of interference signals, a second device can receive the first and second signals by envelope detection. After envelope detection is performed, the mid-frequency component corresponding to the absolute difference between the first and second frequencies is the signal that the second device needs to acquire, and is sometimes called the target signal. In this case, the second device can acquire the target signal by using an intermediate-frequency band-pass filter to suppress any other frequency components that contain interference. It will be understood that since the mid-frequency is lower than the radio frequency, the mid-frequency filter is easier to design and implement under the same Q-factor requirements. Therefore, according to the solution in the embodiment of this application, after envelope detection is performed, the second device can easily distinguish the target signal from interference by using an intermediate-frequency filter, and the complexity of designing and implementing the radio frequency filter is not increased.

[0007] In possible embodiments, the first device transmits the first and second signals within a frequency range corresponding to the channel bandwidth of the second device, such that the absolute difference between the first and second frequencies is greater than or equal to half the channel bandwidth of the second device. According to this solution, the frequency of the mid-frequency component (i.e., the target signal) acquired by the second device by receiving the first and second signals via envelope detection is different from the frequency of the interfering signal. In other words, since the target signal and the interfering signal do not overlap in the spectrum, the interfering signal can be easily filtered out by using a mid-frequency filter. The requirements for the radio frequency filter are low, and the complexity of the design and implementation of the radio frequency filter does not need to be increased.

[0008] In possible embodiments, the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the sum of the third and fourth bandwidths. The fourth bandwidth is twice the sum of the first and second bandwidths, and the third signal lies between the first and second frequencies in the frequency domain. It will be understood that a larger difference between the first and second frequencies indicates a larger difference between the frequency of the target signal and the frequency of the interfering signal. According to this solution, because the difference between the frequency of the target signal and the frequency of the interfering signal is large, it is easy to distinguish the interfering signal from the target signal, and it is easy to filter out the interfering signal by using a mid-frequency filter. Therefore, the requirements for the radio frequency filter are relatively low, and the complexity of the design and implementation of the radio frequency filter does not need to be increased.

[0009] In possible embodiments, the absolute value of the difference between the first frequency and the second frequency is a preset value. For example, the preset value is associated with one or more of the operating bandwidth, the subcarrier interval of the first signal, or the subcarrier interval of the second signal. The operating bandwidth is the operating bandwidth used for communication between the first device and the second device. Because the absolute value of the difference between the first frequency and the second frequency is a preset value, the method is applicable to scenarios where the first device does not need to inform the second device of the absolute value of the difference between the first frequency and the second frequency. For example, after the first device has established a communication connection to the second device, the first device transmits a first signaling signal between the first device and the second device to the second device by using the first and second frequencies.

[0010] In possible embodiments, the method further comprises the first device transmitting first instruction information to a second device. The first instruction information indicates the absolute value of the difference between a first frequency and a second frequency. The first device may also inform the second device of the absolute value of the difference between the first frequency and the second frequency, and this is flexible.

[0011] In possible embodiments, up to one of the first and second signals is used to provide a carrier wave for uplink transmission to the second device. One signal is used to provide a carrier wave for transmission. The signal can also be thought of as being used for backscatter communication and can be called a carrier signal. In comparison to a carrier signal, a data signal is a signal that carries modulation information. Both the first and second signals may be data signals; or the first signal is a data signal and the second signal is a carrier signal. When the first signal is a data signal and the second signal is a carrier signal, it will be understood that the resource overhead of the first device can be reduced. When both the first and second signals are data signals, the reliability of data transmission can be improved.

[0012] In possible embodiments, the power of the first signal is the same as the power of the second signal. Alternatively, the power of the first signal may differ from the power of the second signal. For example, the power of the first signal may be the same as the power of the second signal, and neither the first nor the second signal may be carrier signals; in other words, both the first and second signals may be data signals. In another example, the power of the first signal may be greater than the power of the second signal, with the first signal being a data signal and the second signal being a carrier signal. Since the data signal carries useful information, the reliability of data transmission can be ensured by using high power. Relatively speaking, since the second signal is carrier information and does not carry useful information, the power consumption of the first device can be reduced by using low power. For example, neither the first nor the second signal may be used to provide carriers for uplink transmission of the second device, and the power of the first signal may be the same as the power of the second signal. In another example, one of the first and second signals provides a carrier wave for uplink transmission to the second device, and the power of the first signal may differ from the power of the second signal. This ensures the reliability of data transmission and reduces the power consumption of the first device.

[0013] In possible embodiments, at least one of the first signal and the second signal lies in the protection band of a first carrier, and / or the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the transmission bandwidth of the first carrier. The first carrier is a new radio (NR) carrier or a long-term evolution (LTE) carrier. When both the operating bandwidth of the first device and the operating bandwidth of the second device are in the NR operating band, at least one of the first signal and the second signal lies in the protection band of the NR carrier, so that the impact on the transmission bandwidth of the NR carrier can be reduced.

[0014] In possible embodiments, both the first and second signals are in the transmit bandwidth of the second carrier, the difference between the minimum value of the first frequency domain unit and the lowest frequency of the transmit bandwidth is less than or equal to a first value, and the difference between the maximum value of the second frequency domain unit and the highest frequency of the transmit bandwidth is less than or equal to a second value. The first value may be 0, and the second value may also be 0. When the first and second signals are in the transmit bandwidth of the NR carrier, the operating bandwidth of the first signal (i.e., the first frequency domain unit) and the operating bandwidth of the second signal (i.e., the second frequency domain unit) may be at two ends of the transmit bandwidth of the NR carrier, respectively, in order to ensure the interference immunity performance of the first and second signals as reliable as possible.

[0015] In possible embodiments, the method further comprises the first device transmitting second instruction information to a second device. The second instruction information instructs the second device to receive a signal in either a first or second receiving manner. The first receiving manner instructs the device to receive a signal based on the absolute difference between a first frequency and a second frequency. The second receiving manner instructs the device to receive a signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency. It will be understood that the first device transmits a first signal and a second signal. For the second device, if there is an interfering signal, the second device may receive a signal at a frequency position corresponding to the absolute difference between the first frequency and the second frequency. If there is no interfering signal, in addition to receiving a signal at a frequency position corresponding to the absolute difference between the first frequency and the second frequency, the second device may further receive a low-frequency signal near the DC carrier. Therefore, the first device can inform the second device of the signal reception method in order to ensure the second device's reception performance is as reliable as possible.

[0016] In possible embodiments, the first signal shift keying scheme and / or the second signal shift keying scheme include on-off keying (OOK), multicarrier on-off keying (MC-OOK), double-sideband amplitude-shift keying (DSB-ASK), single-sideband amplitude-shift keying (SSB-ASK), phase-reversal amplitude shift keying (PR-ASK), multiple amplitude-shift keying (MASK), frequency-shift keying (FSK), Gauss frequency-shift keying (GFSK), multiple frequency-shift keying (MFSK), binary phase shift keying (BPSK), and quadrature phase shift keying. These include keying (QPSK), pulse amplitude modulation (PAM), pulse width modulation (PWM), pulse position modulation (PPM), pulse density modulation (PDM), or pulse code modulation (PCM).

[0017] In possible embodiments, the modulation scheme for the first signal is the same as the modulation scheme for the second signal.

[0018] In possible embodiments, the modulation scheme for the first signal differs from that for the second signal.

[0019] In possible embodiments, the first or second signal is a single-carrier signal; or the first or second signal occupies one subcarrier in the frequency domain; or the first or second signal is a signal that encompasses one subcarrier carrying energy.

[0020] In possible embodiments, the first signal and / or the second signal are multi-carrier signals; or the first signal and / or the second signal occupy multiple subcarriers in the frequency domain; or the first signal and / or the second signal are multiple signals or some signals that encompass multiple subcarriers carrying energy.

[0021] In possible embodiments, the antenna port for the first signal is the same as the antenna port for the second signal.

[0022] In possible embodiments, the cyclic prefix length of the first signal is the same as the cyclic prefix length of the second signal.

[0023] In possible embodiments, the subcarrier intervals for the first signal and the subcarrier intervals for the second signal are the same.

[0024] In possible embodiments, the waveforms of the first signal and / or the second signal are obtained by orthogonal frequency division multiplexing (OFDM) using a cyclic prefix (CP).

[0025] In possible embodiments, the waveforms of the first signal and / or the second signal are OFDM using CP, and discrete Fourier transform (DFT) spread is performed.

[0026] According to a second aspect, embodiments of the present application provide a signal receiving method. The method may be performed by a second communication device. The second communication device may be a communication device or a chip system that can support the communication device in implementing the functions required in the method. The following description will be provided using an example in which the communication device is a second device. For example, the second communication device is a second device, a chip located on the second device, or another component configured to implement the functions of the second device. The method includes:

[0027] The second device receives the first and second signals by envelope detection and acquires the target signal. The first and second signals are within a single operating band. The frequency carrying the target signal encompasses the absolute difference between the first frequency carrying the first signal and the second frequency carrying the second signal.

[0028] In possible embodiments, the frequency carrying the target signal further encompasses the frequency of the DC carrier.

[0029] In possible embodiments, before the second device acquires the target signal, the Method further comprises: determining the receiving scheme used by the second device to acquire the target signal. The receiving scheme comprises either the first receiving scheme or the second receiving scheme. The first receiving scheme instructs the device to receive the signal based on the absolute difference between a first frequency and a second frequency. The second receiving scheme instructs the device to receive the signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency.

[0030] In possible embodiments, the second device determining the first or second receiving method includes: the second device receiving second instruction information transmitted by the first device, which indicates the first or second receiving method.

[0031] In possible embodiments, the absolute value of the difference between a first frequency and a second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is the bandwidth occupied in the frequency domain by a first frequency domain unit, the first frequency domain unit encompassing a first frequency. The second bandwidth is the bandwidth occupied in the frequency domain by a second frequency domain unit, the second frequency domain unit encompassing a second frequency. The third bandwidth is the bandwidth occupied in the frequency domain by a third frequency domain unit, the third frequency domain unit used by the first device to transmit a third signal to a third device, the third signal being in the operating band.

[0032] In possible embodiments, the first and second signals are transmitted within a frequency range corresponding to the channel bandwidth of the second device. The absolute difference between the first frequency and the second frequency is greater than or equal to half the channel bandwidth of the second device.

[0033] In possible embodiments, the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the sum of the third bandwidth and the fourth bandwidth. The fourth bandwidth is twice the sum of the first bandwidth and the second bandwidth. The third signal falls between the first frequency and the second frequency in the frequency domain.

[0034] In possible embodiments, the absolute value of the difference between the first frequency and the second frequency is a preset value. The preset value is associated with one or more of the operating bandwidth, the subcarrier interval of the first signal, or the subcarrier interval of the second signal.

[0035] In possible embodiments, the method further includes: a second device receiving first instruction information transmitted by a first device; the first instruction information indicates an absolute value.

[0036] In possible embodiments, up to one of the first signal and the second signal is used to provide a carrier wave for uplink transmission to the second device.

[0037] In possible embodiments, the power of the first signal is equal to the power of the second signal.

[0038] In possible embodiments, the power of the first signal is the same as the power of the second signal, and neither the first nor the second signal is used to provide a carrier for uplink transmission of the second device.

[0039] In possible embodiments, at least one of the first signal and the second signal lies in the protection band of a first carrier, and / or the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the transmit bandwidth of a first carrier. The first carrier is a new radio NR carrier or an LTE carrier.

[0040] In possible embodiments, both the first signal and the second signal are in the transmission bandwidth of the second carrier, the difference between the minimum value of the first frequency unit and the lowest frequency of the transmission bandwidth is less than a first value, and the difference between the maximum value of the second frequency domain unit and the highest frequency of the transmission bandwidth is less than a second value.

[0041] In possible embodiments, the modulation scheme for the first signal and / or the modulation scheme for the second signal are OOK, MC-OOK, DSB-ASK, SSB-ASK, PR-ASK, MASK, FSK, GFSK, MFSK, BPSK, QPSK, PAM, PWM, PPM, PDM, or PCM.

[0042] In possible embodiments, the modulation scheme for the first signal is the same as the modulation scheme for the second signal.

[0043] In possible embodiments, the modulation scheme for the first signal differs from that for the second signal.

[0044] In possible embodiments, the first or second signal is a single-carrier signal; or the first or second signal occupies one subcarrier in the frequency domain; or the first or second signal is a signal that encompasses one subcarrier carrying energy.

[0045] In possible embodiments, the first signal and / or the second signal are multi-carrier signals; or the first signal and / or the second signal occupy multiple subcarriers in the frequency domain; or the first signal and / or the second signal are multiple signals or some signals that encompass multiple subcarriers carrying energy.

[0046] In possible embodiments, the antenna port for the first signal is the same as the antenna port for the second signal.

[0047] In possible embodiments, the cyclic prefix length of the first signal is the same as the cyclic prefix length of the second signal.

[0048] In possible embodiments, the subcarrier intervals for the first signal and the subcarrier intervals for the second signal are the same.

[0049] In possible embodiments, the waveforms of the first signal and / or the second signal are OFDMs using CP.

[0050] In possible embodiments, the waveforms of the first signal and / or the second signal are OFDM using CP, and DFT spread is performed.

[0051] For technical effects brought about by the second aspect and possible embodiments of the second aspect, please refer to the description of the technical effects of the first aspect and embodiments of the first aspect.

[0052] According to a third aspect, embodiments of the present application provide a signal transmission method. The method may be performed by a first communication device. The first communication device may be a communication device or a chip system capable of supporting the communication device in implementing the functions required in the method. The following description will be provided using an example in which the communication device is the first device. For example, the first communication device is the first device, a chip located on the first device, or another component configured to implement the functions of the first device. The method includes:

[0053] The first device determines the first and second signals, transmits the first signal to the second device to the first frequency domain unit, and transmits the second signal to the second frequency domain unit. The first and second signals are in the same operating band. The first frequency domain unit encompasses the first frequency, and the second frequency domain unit encompasses the second frequency. The absolute value of the difference between the first and second frequencies is a preset value. Alternatively, the first device further transmits the absolute value of the difference between the first and second frequencies to the second device.

[0054] In one possible embodiment, the transmission of the absolute difference between a first frequency and a second frequency by a first device to a second device includes: the transmission of instruction information by the first device to the second device, which indicates the absolute difference between a first frequency and a second frequency.

[0055] In possible embodiments, the absolute value of the difference between the first frequency and the second frequency is a preset value. The preset value is associated with one or more of the operating bandwidth, the subcarrier interval of the first signal, or the subcarrier interval of the second signal.

[0056] In possible embodiments, the first and second signals are transmitted within a frequency range corresponding to the channel bandwidth of the second device. The absolute difference between the first frequency and the second frequency is greater than or equal to half the channel bandwidth of the second device.

[0057] In possible embodiments, the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the sum of the third bandwidth and the fourth bandwidth. The fourth bandwidth is twice the sum of the first bandwidth and the second bandwidth. The third bandwidth is the bandwidth occupied in the frequency domain by the third frequency domain unit. The third frequency domain unit is used by the first device to transmit the third signal to the third device. The third signal falls between the first frequency and the second frequency in the frequency domain.

[0058] In possible embodiments, up to one of the first signal and the second signal is used to provide a carrier wave for uplink transmission to the second device.

[0059] In possible embodiments, the power of the first signal is equal to the power of the second signal.

[0060] In possible embodiments, the power of the first signal is the same as the power of the second signal, and neither the first nor the second signal is used to provide a carrier for uplink transmission of the second device.

[0061] In possible embodiments, at least one of the first signal and the second signal lies in the protection band of a first carrier, and / or the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the transmit bandwidth of a first carrier. The first carrier is a new radio NR carrier or an LTE carrier.

[0062] In possible embodiments, both the first signal and the second signal are in the transmission bandwidth of the second carrier, the difference between the minimum value of the first frequency unit and the lowest frequency of the transmission bandwidth is less than a first value, and the difference between the maximum value of the second frequency domain unit and the highest frequency of the transmission bandwidth is less than a second value.

[0063] In possible embodiments, the method further comprises the first device transmitting second instruction information to a second device. The second instruction information instructs the second device to receive a signal using either a first or second receiving method. The first receiving method instructs the device to receive the signal based on the absolute difference between a first frequency and a second frequency. The second receiving method instructs the device to receive the signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency.

[0064] According to a fourth aspect, embodiments of the present application provide a signal receiving method. The method may be carried out by a second communication device. The second communication device may be a communication device or a chip system that can support the communication device in implementing the functions required in the method. The following explanation will be provided using an example in which the communication device is a second device. For example, the second communication device is 2 The first device, a chip placed in the second device, or another component configured to implement the functionality of the second device. The method includes:

[0065] The second device receives the first and second signals by envelope detection. The first and second signals are within a single operating band. The second device acquires the target signal. The frequency carrying the target signal encompasses the absolute difference between the first frequency carrying the first signal and the second frequency carrying the second signal. The absolute difference between the first and second frequencies is either a preset value or is obtained from the first device.

[0066] In possible embodiments, the method further includes: a second device receiving first instruction information transmitted by a first device; the first instruction information indicates an absolute value.

[0067] In possible embodiments, the frequency carrying the target signal further encompasses the frequency of the DC carrier.

[0068] In possible embodiments, before the second device acquires the target signal, the Method further comprises: determining the receiving scheme used by the second device to acquire the target signal. The receiving scheme comprises either the first receiving scheme or the second receiving scheme. The first receiving scheme instructs the device to receive the signal based on the absolute difference between a first frequency and a second frequency. The second receiving scheme instructs the device to receive the signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency.

[0069] In possible embodiments, the second device determining the first or second receiving method includes: the second device receiving second instruction information transmitted by the first device, which indicates the first or second receiving method.

[0070] In possible embodiments, the absolute value of the difference between a first frequency and a second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is the bandwidth occupied in the frequency domain by a first frequency domain unit, the first frequency domain unit encompassing a first frequency. The second bandwidth is the bandwidth occupied in the frequency domain by a second frequency domain unit, the second frequency domain unit encompassing a second frequency. The third bandwidth is the bandwidth occupied in the frequency domain by a third frequency domain unit, the third frequency domain unit used by the first device to transmit a third signal to a third device, the third signal being in the operating band.

[0071] In possible embodiments, the first and second signals are transmitted within a frequency range corresponding to the channel bandwidth of the second device. The absolute difference between the first frequency and the second frequency is greater than or equal to half the channel bandwidth of the second device.

[0072] In possible embodiments, the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the sum of the third bandwidth and the fourth bandwidth. The fourth bandwidth is twice the sum of the first bandwidth and the second bandwidth. The third signal falls between the first frequency and the second frequency in the frequency domain.

[0073] In possible embodiments, the absolute value of the difference between the first frequency and the second frequency is a preset value. The preset value is associated with one or more of the operating bandwidth, the subcarrier interval of the first signal, or the subcarrier interval of the second signal.

[0074] In possible embodiments, the method further includes: a second device receiving first instruction information transmitted by a first device; the first instruction information indicates an absolute value.

[0075] In possible embodiments, up to one of the first signal and the second signal is used to provide a carrier wave for uplink transmission to the second device.

[0076] In possible embodiments, the power of the first signal is equal to the power of the second signal.

[0077] In possible embodiments, the power of the first signal is the same as the power of the second signal, and neither the first nor the second signal is used to provide a carrier for uplink transmission of the second device.

[0078] In possible embodiments, at least one of the first signal and the second signal lies in the protection band of a first carrier, and / or the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the transmit bandwidth of a first carrier. The first carrier is a new radio NR carrier or an LTE carrier.

[0079] In possible embodiments, both the first signal and the second signal are in the transmission bandwidth of the second carrier, the difference between the minimum value of the first frequency unit and the lowest frequency of the transmission bandwidth is less than a first value, and the difference between the maximum value of the second frequency domain unit and the highest frequency of the transmission bandwidth is less than a second value.

[0080] According to a fifth aspect, embodiments of the present application provide a communication device having the function of implementing the behavior in the method embodiment of the first aspect. For beneficial effects, please refer to the description of the first aspect. Details are not repeated herein. The communication device may be the first device of the first aspect, or the communication device may be a device capable of implementing the method provided in the first aspect, such as a chip or chip system.

[0081] In possible designs, the communication device includes corresponding means or modules configured to perform the method according to the first embodiment. For example, the communication device includes a processing unit (sometimes called a processing module or processor) and / or a transceiver unit (sometimes called a transceiver module or transceiver). These units (modules) may perform the corresponding functions in the example of the method according to the first embodiment.

[0082] For example, a processing module may be configured to determine a first signal and a second signal. A transceiver module may be configured to transmit a first signal to a second device to a first frequency-domain unit and a second signal to a second frequency-domain unit. The first frequency-domain unit encompasses a first frequency, and the second frequency unit encompasses a second frequency. The absolute value of the difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is the bandwidth occupied in the frequency domain by the first frequency-domain unit. The second bandwidth is the bandwidth occupied in the frequency domain by the second frequency-domain unit. The third bandwidth is the bandwidth occupied in the frequency domain by the third frequency-domain unit. The third frequency-domain unit is used by the first device to transmit a third signal to a third device. The first signal, the second signal, and the third signal are all within a single operating band. For further details, see the detailed explanation of the example method. Details are not provided in this specification.

[0083] According to the sixth 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. For beneficial effects, please refer to the description of the second aspect. Details are not repeated herein. The communication device may be the second device of the second aspect, or the communication device may be a device capable of implementing the method provided in the second aspect, such as a chip or chip system.

[0084] In possible designs, the communication device includes corresponding means or modules configured to perform the method according to the second embodiment. For example, the communication device includes a processing unit (sometimes called a processing module or processor) and / or a transceiver unit (sometimes called a transceiver module or transceiver). These units (modules) may perform the corresponding functions in the example of the method according to the second embodiment.

[0085] For example, a transceiver module receives a first signal and a second signal by envelope detection, and the first and second signals are within a single operating band. A processing module is configured to acquire a target signal. The frequency carrying the target signal encompasses the absolute difference between the first frequency carrying the first signal and the second frequency carrying the second signal. For further details, see the detailed description of the example method. Details are not described herein.

[0086] According to the seventh aspect, embodiments of the present application provide a communication device having the function of implementing the behavior in the method embodiment of the third aspect. For beneficial effects, please refer to the description of the third aspect. Details are not repeated herein. The communication device may be the first device of the third aspect, or the communication device may be a device capable of implementing the method provided in the third aspect, such as a chip or chip system.

[0087] In possible designs, the communication device includes corresponding means or modules configured to perform the method according to the third embodiment. For example, the communication device includes a processing unit (sometimes called a processing module or processor) and / or a transceiver unit (sometimes called a transceiver module or transceiver). These units (modules) may perform the corresponding functions in the example of the method according to the third embodiment.

[0088] For example, a processing module may be configured to determine a first signal and a second signal. A transceiver module may be configured to transmit a first signal to a second device to a first frequency-domain unit and a second signal to a second frequency-domain unit. The first frequency-domain unit encompasses a first frequency, and the second frequency unit encompasses a second frequency. The absolute value of the difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is the bandwidth occupied in the frequency domain by the first frequency-domain unit. The second bandwidth is the bandwidth occupied in the frequency domain by the second frequency-domain unit. The third bandwidth is the bandwidth occupied in the frequency domain by the third frequency-domain unit. The third frequency-domain unit is used by the first device to transmit a third signal to a third device. The first signal, the second signal, and the third signal are all within a single operating band. For further details, see the detailed explanation of the example method. Details are not provided in this specification.

[0089] According to the eighth aspect, an embodiment of the present application provides a communication device having the function of implementing the behavior in the method embodiment of the fourth aspect. For beneficial effects, please refer to the description of the fourth aspect. Details are not repeated herein. The communication device may be the second device of the fourth aspect, or the communication device may be a device capable of implementing the method provided in the fourth aspect, such as a chip or chip system.

[0090] In possible designs, the communication device includes corresponding means or modules configured to perform the method according to the fourth aspect. For example, the communication device includes a processing unit (sometimes called a processing module or processor) and / or a transceiver unit (sometimes called a transceiver module or transceiver). These units (modules) may perform the corresponding functions in the example of the method according to the fourth aspect.

[0091] For example, a transceiver module receives a first signal and a second signal by envelope detection, and the first and second signals are within a single operating band. A processing module is configured to acquire a target signal. The frequency carrying the target signal encompasses the absolute difference between the first frequency carrying the first signal and the second frequency carrying the second signal. For further details, see the detailed description of the example method. Details are not described herein.

[0092] According to the ninth aspect, embodiments of the present application provide a communication device. The communication device may be any one of the first to fourth aspects of the embodiments described above, or a chip or chip system arranged in any one of the first to fourth aspects of the communication device. The communication device includes a communication interface and a processor, and optionally further includes memory. The memory is configured to store computer programs. The processor is coupled to the memory and the communication interface. When the processor reads a computer program or instruction, the communication device performs a method performed by the first or second device in embodiments of the methods described above.

[0093] The communication interface in the communication device of the ninth embodiment may be a transceiver in the communication device, which is implemented by using, for example, an antenna, feeder, codec, etc. in the communication device. Alternatively, if the communication device is a chip located in the communication device, the communication interface may be the input / output interface of the chip, for example, input / output pins.

[0094] According to the tenth aspect, an embodiment of the present application provides a communication device. The communication device comprises an input / output interface and a logic circuit. The input / output interface is configured to input and / or output information. The logic circuit is configured to perform a method according to any one of the first to fourth aspects.

[0095] According to the eleventh aspect, embodiments of the present application provide a chip system. The chip system comprises a processor, and may further comprise memory and / or communication interfaces, and is configured to implement a method according to any one of the first to fourth aspects. In possible embodiments, the chip system further comprises memory configured to store computer programs. The chip system may comprise a chip, or a chip and another discrete component.

[0096] According to a twelfth aspect, an embodiment of the present application provides a communication system. The communication system comprises a first device and a second device. The first device is configured to perform a method performed by the first device in a first aspect, and the second device is configured to perform a method performed by the second device in a second aspect. Alternatively, the first device is configured to perform a method performed by the first device in a third aspect, and the second device is configured to perform a method performed by the second device in a fourth aspect. Alternatively, the communication system may further comprise more first devices and / or more second devices.

[0097] According to the 13th aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed, a method according to any one of the first to fourth aspects is implemented.

[0098] According to the fourteenth aspect, a computer program product is provided. This computer program product comprises computer program code. When the computer program code is executed, a method according to any one of the first to fourth aspects is performed.

[0099] For the beneficial effects of the fifth through fourteenth aspects and their embodiments, please refer to the description of the beneficial effects of the methods according to the first through fourth aspects and their embodiments. [Brief explanation of the drawing]

[0100] [Figure 1] This is a diagram of a network architecture to which the embodiments of this application can be applied. [Figure 2] This is a diagram illustrating the configuration of a receiver using an envelope detector. [Figure 3] This is a schematic diagram of the circuit structure of the envelope detector. [Figure 4] This is a diagram of the spectrum of the input signal to the envelope detector in the absence of interference. [Figure 5] This is a diagram of the spectrum of the output signal of the envelope detector in the absence of interference. [Figure 6] This is a diagram of the spectrum of the baseband signal after the envelope detector in the absence of interference. [Figure 7] This is a diagram of the spectrum of the input signal to an envelope detector in the presence of interference. [Figure 8] This is a diagram of the spectrum of the output signal of an envelope detector in the presence of interference. [Figure 9] This is a diagram of the spectrum of the baseband signal after the envelope detector in the presence of interference. [Figure 10] This figure shows the spectrum of the input signal to the envelope detector in the presence of interference, according to an embodiment of this application. [Figure 11] This figure shows the spectrum of the output signal of the envelope detector in the presence of interference, according to an embodiment of this application. [Figure 12] This figure shows the spectrum of the baseband signal after the envelope detector in the presence of interference, according to an embodiment of this application. [Figure 13] This diagram illustrates the relationship between channel bandwidth, transmission bandwidth, and protection bandwidth. [Figure 14] This is a schematic flowchart of signal transmission and signal reception according to the embodiments of this application. [Figure 15]This figure shows the frequency positions of the target signal and the interfering signal according to the embodiment of this application (the absolute value of the difference between the first frequency and the second frequency is equal to half the carrier bandwidth). [Figure 16] This figure shows the frequency positions of the target signal and the interfering signal according to the embodiment of this application (the absolute value of the difference between the first frequency and the second frequency is greater than half of the carrier bandwidth). [Figure 17] This is a diagram showing the relative frequency positions of the first signal, the second signal, and the third signal according to an embodiment of the present application. [Figure 18] This figure shows the positions of the first and second signals on the NR carrier wave according to an embodiment of the present application. [Figure 19] This is another diagram showing the positions of the first and second signals on the NR carrier wave according to an embodiment of the present application. [Figure 20] This is yet another diagram showing the positions of the first and second signals on the NR carrier wave according to an embodiment of the present application. [Figure 21] This figure shows an embodiment of the present application in which a signal is transmitted by a first device and a signal is received by a second device. [Figure 22] Another figure according to an embodiment of the present application, in which a signal is transmitted by a first device and a signal is received by a second device. [Figure 23] This is a diagram showing the structure of a communication device according to an embodiment of this application. [Figure 24] This is a diagram showing another structure of a communication device according to an embodiment of this application. [Modes for carrying out the invention]

[0101] The technical solutions provided in embodiments of this application may be applied to 5G mobile communication systems, such as NR systems, or LTE systems, and may be further applied to next-generation mobile communication systems or other similar communication systems. The technical solutions provided in embodiments of this application may be applied alternatively to Internet of Things (IoT) systems, narrowband Internet of Things (NB-IoT) systems, for example, wireless fidelity (WiFi) based IoT or wearable WiFi networks. A wearable WiFi network may be a WiFi network that comprises associated wearable devices and terminal devices (e.g., mobile phones) used as virtual access points. Internet of Things devices and wearable WiFi network devices are powered by small capacity batteries and have requirements for ultra-low power consumption and long battery life. Internet of Things devices include, for example, smart water meters, smart homes, and industrial sensors.

[0102] Figure 1 is a diagram of an exemplary architecture of a communication system to which embodiments of the present application may be applied. The communication system may include a network device and six terminal devices. Each of the six terminal devices may be a mobile phone, smartphone, portable computer, handheld communication device, handheld computing device, satellite radio equipment, global positioning system, personal digital assistant (PDA), and / or any other suitable device configured to perform communication with a wireless communication system, and all may be connected to the network device. All six terminal devices may communicate with the network device. Of course, the number of terminal devices in Figure 1 is merely an example. There may be fewer or more terminal devices. Also, the terminal devices in Figure 1 are examples. For example, the terminal devices may alternatively be Internet of Things devices such as smart water meters.

[0103] In this embodiment of the present application, the network device is an access device used by a terminal device to access a mobile communication system wirelessly, and includes, for example, an access network (AN) device, such as a base station. Alternatively, the network device may be a device that communicates with a terminal device via an air interface. The network device may include an evolved Node B (also abbreviated as eNB or e-NodeB) in an LTE system or a long-term evolution-advanced (LTE-A) system. The network device may alternatively include a next-generation Node B (gNB) in a 5G NR system. Alternatively, the network device may include an access node in a wireless-fidelity (Wi-Fi) system. Alternatively, network devices may include relay stations, in-vehicle devices, future-developed Public Land Mobile Network (PLMN) devices, devices in D2D networks, devices in machine-to-machine (M2M) networks, devices in Internet of Things (IoT) networks, and network devices in PLMN networks. The specific technologies used by the network devices and the specific forms of the devices are not limited to the embodiments of this application.

[0104] In addition, the base station in the embodiments of this application may include a centralized unit (CU) and distributed units (DUs), and multiple DUs may be centrally controlled by a single CU. The CU and DU may be divided based on the protocol layer functions that the CU and DU each have within the radio network. For example, the packet data convergence protocol (PDCP) layer and the protocol layer functions above the packet data convergence protocol layer may be set in the CU, while the protocol layer functions below the PDCP, such as the radio link control (RLC) layer and the medium access control (MAC) layer, may be set in the DU. It should be noted that such a division of protocol layers is merely an example, and other divisions of protocol layers are possible. Radio frequency equipment may be remotely located and not located in the DU, or integrated into the DU, or partially remotely located and partially integrated into the DU. This is not limited to the embodiments of this application. Furthermore, in some embodiments, the control plane (CP) and user plane (UP) of the CU may be separated for implementation purposes and divided into different entities. These different entities are the control plane CU entity (CU-CP entity) and the user plane CU entity (CU-UP entity), respectively. In the network architecture, signaling generated by the CU may be transmitted to terminal devices via the DU, or signaling generated by the UE may be transmitted to the CU via the DU. The DU can transmit signaling transparently to the UE or CU by directly encapsulating the signaling at the protocol layer without parsing the signaling. In this network architecture, the CU is classified as a network device on the radio access network (RAN) side.In addition, CUs may be alternatively classified as network devices on the core network (CN) side. This is not limited to the present application.

[0105] Alternatively, the access network device may be a server or the like. For example, the network device in vehicle-to-everything (V2X) technology may be a roadside unit (RSU). The following explanation will use an example where the access network device is a base station. The base station may communicate with terminal devices, or it may communicate with terminal devices via a relay station. Terminal devices may communicate with multiple base stations using different access technologies.

[0106] In embodiments of this application, the terminal device is a device having wireless transceiver functionality that can transmit signals to or receive signals from a network device. The terminal device may encompass user equipment (UE) and may also be referred to as a terminal, access station, UE station, remote station, wireless communication device, user equipment, etc. The terminal device is configured to connect people, objects, machines, etc., and can be widely used in a variety of scenarios, including but not limited to the following: cellular communication, D2D, V2X, machine-to-machine / machine-type communication (M2M / MTC), Internet of Things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self-driving, remote medical, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, unmanned aerial vehicles, robots, etc. For example, terminal devices may include mobile phones, tablets, computers with wireless transceiver functionality, VR terminals, AR terminals, wireless terminals for industrial control, wireless terminals for autonomous driving, smart speakers for IoT networks, wireless terminal devices for telemedicine, wireless terminal devices for smart grids, wireless terminal devices for traffic security, wireless terminal devices for smart cities, and wireless terminal devices for smart homes.

[0107] For example, but not limited to, in embodiments of this application, the terminal device may alternatively be a wearable device. Wearable devices are also sometimes called wearable intelligent devices or intelligent wearable devices, and are a general term for wearable devices that are intelligently designed and developed for everyday wear by using wearable technology, such as eyeglasses, gloves, watches, clothing, and shoes. If any of the above-mentioned terminal devices are located in a vehicle (e.g., placed in or installed in a vehicle), then all terminal devices may be considered on-board terminal devices. For example, an on-board terminal device is also called an on-board unit (OBU). The terminal device of this application may alternatively be an on-board assembly, on-board module, on-board component, on-board chip, or on-board unit incorporated into the vehicle as one or more components or units. The vehicle implements the method of this application using an on-board module, on-board assembly, on-board component, on-board chip, or on-board unit incorporated into the vehicle.

[0108] In embodiments of this application, the communication device configured to implement the functions of a network device may be a network device, or it may be a device capable of supporting a network device when implementing its functions, such as a chip system. This device may be installed on the network device. An example in which the device configured to implement the functions of a network device is a network device is used to illustrate the technical solution provided in embodiments of this application.

[0109] The following sections will explain and describe some of the terms used in the embodiments of this application.

[0110] (1) Channel Bandwidth: The UE channel bandwidth supports a single NR radio frequency carrier in the uplink or downlink at the UE. From the base station's perspective, different UE channel bandwidths within the same spectrum may be supported for transmission and reception to and from UEs connected to the base station. Transmission of multiple carriers to the same UE (carrier) or multiple carriers to different UEs within the base station channel bandwidth may be supported. From the UE's perspective, a UE may consist of one or more bandwidth parts (BWPs) / carriers, each having its own UE channel bandwidth. The UE does not need to be aware of the base station channel bandwidth or how the base station allocates bandwidth to different UEs.

[0111] The UE channel bandwidth for each UE carrier is flexibly configured, but it must fit entirely within the base station's channel bandwidth. For example, the relationship between channel bandwidth, protection bandwidth, and maximum transmit bandwidth configuration is shown in Figure 13.

[0112] (2) Operating Bandwidth: The operating band is the frequency band supported by the device, for example, 900 MHz and 1.8 GHz. One operating band can encompass multiple carriers, and one carrier can encompass one transmit band and at least two protection bands. The transmit band may be used by the device to transmit signals.

[0113] (3) Frequency Domain Units: A frequency domain unit is a contiguous segment of frequency domain resources in the frequency domain. For example, a single transmission band can encompass multiple frequency domain units.

[0114] (4) Carrier signal: The carrier signal may be used for backscatter communication, provide a carrier for uplink transmission by a receiving device, or provide energy to a receiving device. There is a data signal that is compared to the carrier signal. The data signal may be thought of as a signal that carries modulation information. In embodiments of this application, the waveform corresponding to the carrier signal may be a sine or cosine wave of a given frequency, or amplitude and / or phase modulation may not be performed on the waveform corresponding to the carrier signal. Alternatively, amplitude and / or phase modulation may be performed on the waveform corresponding to the carrier signal, but the overall amplitude is insufficient for the receiving device to consider the carrier signal as a data signal. Relatively, amplitude and / or phase modulation may be performed on the waveform corresponding to the data signal, but the overall amplitude is sufficient for the receiving device to consider the data signal as a data signal.

[0115] (5) The terms “system” and “network” may be used interchangeably in embodiments of this application. In embodiments of this application, “multiple” may also be understood as “at least two.” “At least one” may be understood as one or more, e.g., one, two, or more. For example, “encompassing at least one” means “encompassing one, two, or more,” and is not limited to which are encompassed. For example, “encompassing at least one of A, B, and C” may mean “encompassing A, B, or C,” “encompassing A and B, A and C, or B and C,” or “encompassing A, B, and C.” The term “and / or” describes a relational relationship to describe related objects and indicates that three relationships may exist. For example, A and / or B may represent the following three cases: namely, only A exists, both A and B exist, and only B exists. In addition, the letter “ / ” generally indicates an “or” relationship between related objects.

[0116] Unless otherwise specified, ordinal numbers such as “First” and “Second” in the embodiments of this application are used to distinguish between multiple objects and are not intended to limit the order, chronological order, priority or importance of the multiple objects. For example, “First Device” and “Second Device” are used solely to distinguish between different devices and are not used to limit the function, priority or importance of the two devices. In the embodiments of this application, “if” and “if” may be interchangeable, and unless otherwise specified, “when” and “if,” may be interchangeable.

[0117] Embodiments of this application are intended to reduce interference between signals without increasing the complexity of filters in the receiver. To better understand the solutions provided in embodiments of this application, some relevant concepts of the receiver will be described first.

[0118] To implement low power consumption, receivers can process received signals via amplitude modulation and envelope detection to avoid using high-power radio frequency modules, such as highly linear frequency mixers. A module located in a receiver and configured to complete envelope detection is sometimes called an envelope detector. Figure 2 shows the configuration of a receiver with an envelope detector. As shown in Figure 2, the receiver mainly comprises a radio frequency amplifier, an envelope detector, and a baseband amplifier. The envelope detector has a nonlinear component and therefore has high noise. Thus, in order to properly demodulate the received signal, the received signal needs to be amplified before the envelope detector by using a radio frequency amplifier. After the envelope detector outputs a baseband signal, the baseband amplifier can amplify and output the baseband signal. Receivers require high passband selectivity. Therefore, before the radio frequency amplifier, the received radio frequency signal needs to be filtered by using a filter. A filter is a filter circuit that includes capacitors, inductors, and resistors and is mainly configured to filter signal frequencies. A filter allows signals of a specific frequency to pass through while suppressing signals of other unwanted frequencies. This solves the problem of interference between signals of different frequency bands. Note that Figure 2 is merely an example of a receiver configuration. The specific configuration of the receiver is not limited to this embodiment of the present application. For example, the receiver may alternatively include multiple envelope detectors.

[0119] Figure 3 is a schematic diagram of the circuit structure of the envelope detector. The envelope detector mainly includes a diode and an oscillation circuit including a capacitor and a resistor. The envelope detector is a non-linear component, and it functions by using the unidirectional conductivity of the diode. As shown in FIG. 3, a forward voltage signal (shown in the direction of the thick arrow in the figure) is input to the diode. When the potential difference on both sides of the diode is higher than the conduction voltage, the diode is turned on, current flows to the ground through the resistor R, a potential difference exists across the capacitor C, and the capacitor operates in a charged state. When a reverse voltage signal (shown in the direction of the thin arrow in the figure) is input to the diode, the diode is in a non-connected state, that is, it is not conducting. In this case, the capacitor is in a discharging state, and current flows to the ground through the resistor R.

[0120] When there is no interference signal, the input signal x (t) is assumed to satisfy:

[0121] x sig (t)=A sig (t)×cos(2πf c,sig t), where A sig (t) represents the desired signal, and f c,sig is the carrier frequency used to carry the desired signal. FIG. 4 is a diagram of the spectrum of x sig (t).

[0122] The output signal y sig (t) of the envelope detector is

Number

number

number

[0124] If there is an interference signal, for example, if the interference signal is input to the envelope detector, x inf (t) is x inf (t)=A inf (t) × cos(2πf) c,inf t) satisfies, and in the formula, A inf (t) represents the interference signal, f c,inf x is the carrier frequency used to carry the interference signal. In this case, the input signal x(t) to the envelope detector is x(t) = x sig (t)+x inf (t) is satisfied. The spectrum of the input signal is shown in Figure 7.

[0125] The output signal y(t) of the envelope detector satisfies the following: y(t)=(x(t)) 2 =(x sig (t)+x inf (t)) 2

[0126] x sig (t) and x inf Substituting (t) into the above equation, y(t) is:

number

number

number

[0127]

number

number

number

number

[0128] Furthermore, filter performance directly impacts the quality of communication. Indicators for measuring filter performance include Q-factor, bandwidth, stopband suppression, insertion loss, and delay time. Q-factor and insertion loss are the most important performance indicators. The Q-factor is a numerical value representing the filter's performance, indicating its ability to separate adjacent frequency components within a signal. A higher Q-factor indicates a narrower passband, better frequency band selectivity, and better filtering effect. Insertion loss is the loss caused by introducing a filter into the original signal within the circuit, and is expressed in dB. A higher insertion loss value indicates greater attenuation. For example, if the insertion loss is 3 dB, the signal power is attenuated by 50%. Therefore, receivers require filters with high Q-factors to achieve good filtering effects. However, on-chip filters typically have low Q-factors. If a high Q-factor is expected for an on-chip filter, bulk acoustic wave (BAW) or surface acoustic wave (SAW) filters would need to be externally connected. It is clear that this would not meet the requirements for a low level of receiver integration and a small receiver size.

[0129] With this in mind, the solution in the embodiments of this application is provided. In the embodiments of this application, a transmitting end device can transmit two signals (e.g., a first signal and a second signal) at two frequency positions (e.g., a first frequency and a second frequency). For example, the transmitting end device transmits a first signal at the first frequency position and a second signal at the second frequency position. In the case of a receiving device, the radio frequency filter of the receiving end device must allow the first and second signals to pass through, in other words, the passband of the radio frequency filter must encompass the first and second frequencies. It will be understood that a larger gap between the first and second frequencies indicates a lower requirement for the Q value of the radio frequency filter, in other words, a radio frequency filter with a higher Q value is not required. Therefore, according to the method in the embodiments of this application, the complexity of designing and implementing the radio frequency filter cannot be increased. In addition, a second device can receive the first and second signals through envelope detection. After envelope detection is performed, the mid-frequency component corresponding to the absolute difference between the first frequency and the second frequency is the signal that the receiving end device needs to acquire (referred to herein as the target signal). Therefore, the receiving end device can acquire the target signal by using a mid-frequency filter to suppress another signal containing interference. Since the mid-frequency is lower than the radio frequency, the mid-frequency filter is easier to design and implement under the same Q-factor requirements. Thus, according to the solution in this embodiment of the present application, after envelope detection is performed, the second device can easily distinguish the target signal from interference by using a mid-frequency filter, without increasing the complexity of designing and implementing the radio frequency filter.

[0130] For ease of understanding, an example is used in which a first device transmits a first signal to a second device at a first frequency and a second signal at a second frequency to illustrate how interference suppression is implemented in the solutions provided in the embodiments of this application.

[0131] The input x(t) to the envelope detector is x(t) = x if there is an interference signal. sig1 (t)+x sig2 (t)+x inf (t) satisfies x inf (t)=A inf (t) × cos(2πf) c,inf t), where A inf (t) represents the interference signal, f c,inf x is the carrier frequency used to carry the interference signal. sig1 (t)=A sig1 (t) × cos(2πf) c,sig1 t), in the formula A sig1 (t) represents the first signal, f c,sig1 x is the carrier frequency used to carry the first signal. sig2 (t)=A sig2 (t) × cos(2πf) c,sig2 t), in the formula A sig2 (t) represents the second signal, f c,sig2 x is the carrier frequency used to carry the second signal. Figure 10 is a diagram of the spectrum of x(t). In Figure 10, signal 1 is the first signal and signal 2 is the second signal.

[0132] The output signal y(t) of the envelope detector satisfies the following: y(t)=(x(t)) 2 =(x sig1 (t)+x sig2 (t)+x inf (t)) 2

[0133] x sig1 (t), x sig2 (t), and x inf Substituting (t) into the above equation, we obtain the following:

number

[0134] From the above equation, it can be seen that the output signal of the envelope detector includes high-frequency components, medium-frequency components, and DC components. The frequency of the high-frequency component is 2f c,sig1 , 2f c,sig2 , 2f c,inf ,f c,inf +f c,sig1 , and f c,sig2 +f c,inf , and f c,sig2 +f c,sig1 It includes. The frequency of the mid-frequency component is f c,inf -f c,sig1 ,f c,sig2 -f c,inf ,f c,sig2 -f c,sig1 It includes. The mid-frequency component has a frequency of f c,sig2 -f c,sig1 Only the component of does not contain interference. Therefore, the frequency is f c,sig2 -f c,sig1 A band-pass filter may be used to ensure that only the component of the target signal is allowed to pass through, while other frequency components are suppressed. As shown in Figure 11, the interfering signal is the target signal.

number

number

[0135] A sig1 (t)A sig2 (t) × cos(2π(f) c,sig2 -f c,sig1)t) are mid-frequency components, and it will be understood that mid-frequency processing is complex and power-consuming. To reduce processing complexity and power consumption, a second device may filter out the mid-frequency components by using a band-pass filter, as shown in Figure 12, and then perform further down-conversion processing on the mid-frequency components that have passed through the band-pass filter to obtain a baseband signal. Embodiments of down-conversion are not limited to the embodiments of this application. For example, the second device may implement down-conversion operation by using an envelope detector, or by using a low-frequency crystal oscillator and a frequency mixer.

[0136] An example is used in which the second device can implement down-conversion operation by using an envelope detector. For example, the input signal to the envelope detector is

number

number

[0137] The output signal of the envelope detector has a frequency of 2(f c,sig2 -f c,sig1 ) includes the high-frequency components. Therefore, by using a low-pass filter, the high-frequency components can be filtered out, and the baseband signal in the formula

number

number

number

[0138] Therefore, the second device is

number

[0139] An example is used in which the second device implements down-conversion operation by using a frequency mixer. One input signal to the frequency mixer is

number

[0140] In this case, the output signal z(t) of the frequency mixer satisfies the following:

number

[0141] The output signal of the envelope detector has a frequency of 2(f c,sig2 -f c,sig1 ) includes the high-frequency components. Therefore, the high-frequency components can be filtered out by using a low-pass filter, and the baseband signal in the formula

number

number

number

[0142] Therefore, the second device can restore the information carried by the first signal and / or the second signal [Math] [Based on], the information signal carried by the first base signal and / or the second base signal can be restored.

[0143] In an example, both A sig1 (t) and A sig2 (t) can be data signals, specifically signals carrying useful information. A sig1 (t) and A sig2 (t) are modulated by ASK or OOK. At instant t, all the information bits carried by A sig1 (t) and A sig2 (t) are assumed to be "1". In this case, the second device can [Math] Obtain the information bit "1" by detecting [Math]. For example, the second device can [[ID=​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​When one signal of (t) is a data signal and the other signal is a carrier signal, for example, A sig1 When (t) is a data signal, A sig1 It is assumed that the modulation method of (t) is ASK or OOK, A sig2 When (t) is a carrier signal and does not carry useful information, A sig2 (t) can be a constant value, for example, A sig2 (t) is always 1. In this case,

Number

[0146] S1401: The first device transmits a first signal to the first frequency domain unit and a second signal to the second frequency domain unit.

[0147] In the case of radio frequency filters, it will be understood that filtering signals within a narrow frequency range imposes high requirements on the radio frequency filter. In this embodiment of the present application, when transmitting a signal to a second device, the first device can transmit two signals at two frequency positions to reduce the requirements of the radio frequency filter. For example, the first device can determine (generate) a first signal and a second signal, transmit the first signal at a first frequency in a first frequency domain unit, and transmit the second signal at a second frequency in a second frequency domain unit. The first frequency domain unit can be considered a frequency domain resource used to transmit the first signal, and the second frequency domain unit can be considered a frequency domain resource used to transmit the second signal. Note that the first frequency may be the center frequency of the first frequency domain unit, and correspondingly, the second frequency is the center frequency of the second frequency domain unit. Alternatively, the first frequency may be the lowest frequency of the first frequency domain unit, and correspondingly, the second frequency is the lowest frequency of the second frequency domain unit. Alternatively, the first frequency may be the highest frequency of the first frequency domain unit, and correspondingly, the second frequency is the highest frequency of the second frequency domain unit. Note that the first frequency unit can encompass two sub-frequency units: the first sub-frequency unit and the second sub-frequency unit. The frequency of the first sub-frequency unit is higher than the frequency of the second sub-frequency unit. The second frequency unit can encompass two sub-frequency units, namely the third sub-frequency unit and the fourth sub-frequency unit. The frequency of the third sub-frequency unit is higher than the frequency of the fourth sub-frequency unit. In this case, the first frequency may be the center frequency of the first sub-frequency domain unit, and correspondingly, the second frequency is the center frequency of the third sub-frequency domain unit. Alternatively, the first frequency may be the lowest frequency of the first sub-frequency domain unit, and correspondingly, the second frequency is the lowest frequency of the third sub-frequency domain unit.Alternatively, the first frequency may be the highest frequency of the first sub-frequency domain unit, and correspondingly, the second frequency is the highest frequency of the third sub-frequency domain unit. Alternatively, the first frequency may be the center frequency of the second sub-frequency domain unit, and correspondingly, the second frequency is the center frequency of the fourth sub-frequency domain unit. Alternatively, the first frequency may be the lowest frequency of the second sub-frequency domain unit, and correspondingly, the second frequency is the lowest frequency of the fourth sub-frequency domain unit. Alternatively, the first frequency may be the highest frequency of the second sub-frequency domain unit, and correspondingly, the second frequency is the highest frequency of the fourth sub-frequency domain unit.

[0148] The first device transmits a first signal and a second signal. Correspondingly, the passband of the radio frequency filter of the second device can encompass both the first and second frequencies. It will be understood that a larger difference between the first and second frequencies indicates a lower requirement for the complexity of the design and implementation of the radio frequency filter. Therefore, when the first device transmits the first signal at the first frequency and the second signal at the second frequency, the complexity of the design and implementation of the radio frequency filter of the second device does not increase. Note that the difference between the first and second frequencies is the absolute value of the difference between the first and second frequencies. For example, if the first frequency is greater than the second frequency, the difference between the first and second frequencies is obtained by subtracting the second frequency from the first frequency. If the first frequency is less than the second frequency, the difference between the first and second frequencies is obtained by subtracting the first frequency from the second frequency.

[0149] In addition, considering the presence of interference signals, a second device can receive the first and second signals by envelope detection. After envelope detection is performed, the mid-frequency component corresponding to the absolute difference between the first and second frequencies is the target signal that the second device needs to acquire. In this case, the second device can acquire the target signal by using an intermediate-frequency band-pass filter to suppress any other frequency components containing interference. It will be understood that since the mid-frequency is lower than the radio frequency, it is easier to design and implement a mid-frequency filter under the same Q-factor requirements. Therefore, after envelope detection is performed, the second device can easily distinguish the target signal from the interference by using a mid-frequency filter.

[0150] In this embodiment of the present application, the absolute value of the difference between the first frequency and the second frequency must satisfy certain conditions in order to reduce the requirements of the radio frequency filter as much as possible and improve the interference suppression effect as much as possible.

[0151] In possible embodiments, the first device can determine an absolute value based on one or more of the bandwidth occupied in the frequency domain by the first frequency domain unit, the bandwidth occupied in the frequency domain by the second frequency domain unit, or the bandwidth occupied in the frequency domain by the frequency domain unit used by the first device to transmit a signal to a device other than the second device. For ease of explanation, as specified herein, the bandwidth occupied in the frequency domain by the first frequency domain unit is referred to as the first bandwidth, the bandwidth occupied in the frequency domain by the second frequency domain unit is referred to as the second bandwidth, and the bandwidth occupied in the frequency domain by the frequency domain unit used by a device other than the second device (e.g., the third device) to transmit a signal (e.g., referred to as the third frequency domain unit) is referred to as the third bandwidth. The absolute value of the difference between the first frequency and the second frequency can also be understood as being associated with one or more of the first bandwidth, the second bandwidth, or the third bandwidth. It will be understood that the first signal, the second signal, and the third signal are in a single operating band. The operating bandwidth is the frequency band used for communication between the first device and the second device, and may be the NR operating bandwidth. Note that there may be one third device or multiple third devices.

[0152] In the example, the first device transmits the first and second signals within a frequency range corresponding to the channel bandwidth of the second device. In this case, the absolute difference between the first and second frequencies is greater than or equal to half the channel bandwidth of the second device. It will be understood that the absolute difference between the first and second frequencies is less than or equal to the channel bandwidth of the second device. The channel bandwidth of the second device can be transmitted to the first device by the second device. Since the absolute difference between the first and second frequencies is greater than or equal to half the channel bandwidth of the second device, the frequency of the mid-frequency component (i.e., the target signal) acquired by the second device by receiving the first and second signals through envelope detection is different from the frequency of the interfering signal. In other words, since the target signal and the interfering signal do not overlap in the spectrum, the interfering signal can be easily filtered out by using a mid-frequency filter, and the requirements for radio frequency filters are low. For ease of understanding, a diagram will be used as an example below.

[0153] Figure 15 shows the frequency positions of the target signal and interference signal when the absolute value of the difference between the first frequency and the second frequency is equal to half the carrier bandwidth. Note that the carrier bandwidth (BW) is less than or equal to the channel bandwidth of the second device. In Figure 15, f1 is the first frequency, f2 is the second frequency, and f3 is the frequency of the interference signal (called the third frequency). Also in Figure 15, f1 is the highest frequency of BW, f2 is half of BW, and f3 is the lowest frequency of BW. As shown in Figure 15, if the first device transmits the first signal at f1, the second signal at f2, and the interference signal at f3, the second device can receive the first and second signals through envelope detection and acquire the signal, i.e., the target signal, at f1-f2. Since the absolute difference between the first frequency and the second frequency is equal to half of the bandwidth (BW), the frequency of the target signal is half of the bandwidth, and the frequency of the interfering signal is also half of the bandwidth. In other words, because the interfering signal and the target signal overlap in the spectrum, it is difficult to filter out the interfering signal using a filter, and the requirements for radio frequency filters are high.

[0154] Relatively speaking, Figure 16 shows the frequency positions of the target signal and the interfering signal when the absolute value of the difference between the first frequency and the second frequency exceeds half the carrier bandwidth. Unlike Figure 15, in Figure 16, f2 is 1 / 3 of the bandwidth. The second device receives the first and second signals by envelope detection, and the second device can acquire the signal, i.e., the target signal, at f1-f2. The absolute value of the difference between the first frequency and the second frequency is 2 / 3 of the bandwidth, which is greater than half of the bandwidth, so the frequency of the target signal is at f1-f2, i.e., 1 / 3 of the bandwidth, and the frequency of the interfering signal is 2 / 3 of the bandwidth. In other words, since the interfering signal and the target signal do not overlap in the spectrum, the interfering signal can be easily filtered out by using a mid-frequency filter, and the requirements for radio frequency filters are low.

[0155] Note that in Figures 15 and 16, examples are used in which the first and second frequencies are on one side of the third frequency. The relative positions between the first and second frequencies and the third frequency are not limited to this embodiment of the present application. For example, the first and second frequencies may be on both sides of the third frequency. In addition, the first device may be configured using a carrier bandwidth. For example, the first device may be configured using a carrier bandwidth based on the channel bandwidth of the second device. Thus, the first device can determine the first and second frequencies before transmitting the first and second signals.

[0156] In another example, the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the sum of the third and fourth bandwidths, the fourth bandwidth is twice the sum of the first and second bandwidths, and the third signal lies between the first and second frequencies in the frequency domain. In other words, the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the third bandwidth + 2 × (first bandwidth + second bandwidth). When the absolute value of the difference between the first and second frequencies is greater than or equal to the third bandwidth + 2 × (first bandwidth + second bandwidth), it can be seen that the difference between the frequency of the target signal and the frequency of the interfering signal is large, and the interfering signal and the target signal are easily distinguishable. Therefore, it is easy to filter out the interfering signal by using a mid-frequency filter, and the requirements for a radio frequency filter are lower. To facilitate understanding, a diagram will be used as an example below.

[0157] Figure 17 shows the relative frequency positions of the first, second, and third signals. In Figure 17, an example is used where the first frequency (f1) is the lowest frequency in the first frequency domain unit, and the second frequency (f2) is the lowest frequency in the second frequency domain unit. From Figure 17, it can be seen that if the absolute value of the difference between the first and second frequencies is greater than or equal to the third bandwidth + 2 × (first bandwidth + second bandwidth), the target signal and the interfering signal do not overlap in the spectrum, and therefore the target signal and the interfering signal can be distinguished. The larger the absolute value of the difference between the first and second frequencies, the longer the distance between the target signal and the interfering signal in the spectrum. In other words, in Figure 17, it can be understood that the distance between the frequency boundary of the interfering signal and the frequency boundary of the target signal is long. In this way, it becomes easier for the second device to extract the target signal by using a mid-frequency filter.

[0158] Before transmitting the first and second signals, the first device can determine the first and second frequencies. For example, the first device can determine the first frequency and then determine the second frequency based on the absolute difference between the first and second frequencies. Alternatively, the first device can determine the second frequency and then determine the first frequency based on the absolute difference between the first and second frequencies. The second device needs to know the absolute difference between the first and second frequencies, which allows it to know the frequency position at which the target signal will be acquired.

[0159] In possible embodiments, the absolute value of the difference between the first frequency and the second frequency may be predefined or preconfigured. For example, the absolute value of the difference between the first frequency and the second frequency is a preset value. For example, the preset value may be determined based on one or more of the operating bandwidths of the first and second signals, the subcarrier interval of the first signal, or the subcarrier interval of the second signal. Alternatively, the preset value may be understood to be associated with one or more of the following: the operating bandwidths of the first and second signals, the subcarrier interval of the first signal, or the subcarrier interval of the second signal. Alternatively, the preset value may have a correspondence with one or more of the following: the operating bandwidths of the first and second signals, the subcarrier interval of the first signal, or the subcarrier interval of the second signal. Since the absolute value of the difference between the first frequency and the second frequency is a preset value, after the first device establishes a communication connection to the second device, the first device transmits the first signaling between the first and second devices to the second device by using the first and second frequencies. In other words, the absolute value of the difference between the first and second frequencies is preset, which is applicable to scenarios where the first device does not need to inform the second device of the absolute value of the difference between the first and second frequencies. Indeed, the absolute value of the difference between the first and second frequencies is a preset value, which may be used by the first device as an alternative to transmit signaling other than the first signaling between the first and second devices to the second device.

[0160] If the absolute value of the difference between the first frequency and the second frequency is a preset value, the first device can transmit a first signal at the first frequency and a second signal at the second frequency based on the preset value. Correspondingly, the second device can also acquire a signal at a frequency position corresponding to the absolute value of the difference between the first frequency and the second frequency, based on the preset value.

[0161] In another possible embodiment, the absolute value of the difference between the first frequency and the second frequency may be communicated to the second device by the first device.

[0162] S1402: The first device transmits first instruction information to the second device, and in response, the second device receives the first instruction information transmitted by the first device, and the first instruction information indicates the absolute value of the difference between the first frequency and the second frequency.

[0163] The first device can dynamically specify the absolute value of the difference between the first frequency and the second frequency by using the first instruction information, which is more flexible. For example, when determining the absolute value of the difference between the first frequency and the second frequency, the first device can point to the maximum transmit bandwidth capability of the second device. Thus, for different receiving devices, the first device can adaptively adjust the absolute value of the difference between the first frequency and the second frequency to reduce the radio frequency filter requirements of each receiving device as much as possible. The second device obtains a signal at the frequency position corresponding to the absolute value of the difference between the first frequency and the second frequency based on the absolute value indicated by the first instruction information.

[0164] Specific embodiments in which the first instruction information indicates the absolute value of the difference between a first frequency and a second frequency are not limited to this embodiment of the present application. For example, the first instruction information may directly indicate the absolute value of the difference between a first frequency and a second frequency, which is simple and direct. For example, the first instruction information may encompass the absolute value of the difference between a first frequency and a second frequency.

[0165] For example, the first indication information can indirectly indicate the absolute value of the difference between a first frequency and a second frequency. For example, the first indication information can encompass the difference between the first frequency and the second frequency. The second device can determine the absolute value of the difference between the first frequency and the second frequency based on the difference between the first frequency and the second frequency. In another example, the first indication information can encompass the first frequency and the second frequency. The second device can determine the absolute value of the difference between the first frequency and the second frequency based on the difference between the first frequency and the second frequency. In yet another example, the first indication information can encompass several parameters used to determine the absolute value of the difference between the first frequency and the second frequency, and the second device can determine the absolute value of the difference between the first frequency and the second frequency based on these parameters. These parameters may include, for example, the operating bandwidths of the first and second signals, the subcarrier interval of the first signal, or the subcarrier interval of the second signal, one or more of these. For example, the first instruction information includes the operating bandwidths of the first and second signals and indirectly indicates the absolute value of the difference between the first frequency and the second frequency. The second device can determine the absolute value of the difference between the first frequency and the second frequency based on the correspondence between the operating bandwidths and the absolute value of the difference between the first and second frequencies, and the operating bandwidths of the first and second signals. In another example, the first instruction information includes the subcarrier interval of the first signal, and the second device can determine the absolute value of the difference between the first and second frequencies based on the correspondence between the subcarrier intervals and the absolute value of the difference between the first and second frequencies, and the subcarrier interval of the first signal.

[0166] It should be noted that S1402 is not a mandatory step, i.e., an optional step, as the absolute value of the difference between the first frequency and the second frequency may be a preset value, and this is indicated by the use of a dashed line in Figure 14. In addition, in this embodiment of the present application, the order in which S1401 and S1402 are performed is not limited. Specifically, S1402 may be performed before S1401, after S1401, or simultaneously with S1401.

[0167] In possible embodiments, up to one of the first and second signals is used to provide a carrier for uplink transmission to the second device. In other words, at most one of the first and second signals is a carrier signal. For example, the first signal is a data signal and the second signal is a carrier signal; or the first signal is a carrier signal and the second signal is a data signal; or both the first and second signals are data signals. It will be understood that, compared to a carrier signal, a data signal carries modulation information. If one of the first and second signals is a data signal and the other is a carrier signal, the resource overhead of the first device can be reduced. If both the first and second signals are data signals, the reliability of data transmission can be improved.

[0168] In possible embodiments, the power of the first signal is the same as the power of the second signal. Alternatively, the power of the first signal may differ from the power of the second signal.

[0169] For example, if the power of the first signal is the same as the power of the second signal, neither the first nor the second signal has to be a carrier signal; in other words, both the first and second signals are data signals. If the power of the first signal is greater than the power of the second signal, the first signal is a data signal, and the second signal may be a carrier signal to reduce resource overhead. It can also be understood that the first device can determine that the power of the first signal is the same as the power of the second signal, and therefore the first device can determine that both the first and second signals are data signals. Alternatively, the first device can determine that the power of the first signal is greater than the power of the second signal, and therefore the first device can determine that the first signal is a data signal and the second signal is a carrier signal. It will be understood that carrier signals do not carry useful information and may be transmitted at low power to reduce the energy consumption of the device. Therefore, in some examples, the first signal is a data signal and the second signal is a carrier signal, and the transmit power of the first signal is greater than the transmit power of the second signal. It is also understandable that the first device determines that the first signal is a data signal and the second signal is a carrier signal, and that the first device determines that the transmit power of the first signal is greater than the transmit power of the second signal, thereby ensuring the reliability of data transmission as much as possible. Indeed, if both the first and second signals are data signals, the transmit power of the first signal can be the same as the transmit power of the second signal. It is also understandable that the first device determines that both the first and second signals are data signals, and that the first device determines that the transmit power of the first signal is the same as the transmit power of the second signal.

[0170] In possible embodiments, the carrier signal may be a single carrier signal. For example, if the first signal is a carrier signal, then the first signal is a single carrier signal. In another example, if the second signal is a carrier signal, then 2 The first signal is a single-carrier signal. Alternatively, the first or second signal occupies one subcarrier in the frequency domain. Alternatively, the first or second signal is a signal that contains a subcarrier carrying energy.

[0171] In possible embodiments, the first signal and / or the second signal are multiple multicarrier signals. Alternatively, the first signal and / or the second signal occupy multiple subcarriers in the frequency domain. The first signal and / or the second signal are multiple signals that encompass multiple subcarriers carrying energy.

[0172] Given that the frequency domain resources used for communication between the first and second devices may be NR carriers or LTE carriers, the frequency positions of the first and second signals must satisfy certain conditions in order to reduce the impact on the operating bandwidth of the NR carrier. It can also be said that the first and second frequency domain units must satisfy certain conditions, encompassing the following two cases:

[0173] In the first case, at least one of the first and second signals is in the protection band of one NR carrier or one LTE carrier; and / or, the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the transmission bandwidth of one NR carrier or one LTE carrier. For ease of understanding, a diagram will be used as an example below.

[0174] Figure 18 shows the positions of a first signal and a second signal on an NR carrier. In Figure 18, an example is used in which the first frequency domain unit is located in the protected band of the NR carrier and the second frequency domain unit is located in the transmitted band of the NR carrier. In other words, the first signal is in the protected band of the NR carrier and the second signal is in the transmitted band of the NR carrier. For example, if the first signal is a carrier signal, then the first signal may be in the protected band of the NR carrier. Alternatively, if the first signal is in the protected band of the NR carrier, then the first signal may be considered a carrier signal. Because the first signal is in the protected band of the NR carrier, transmission of the first signal does not affect transmission in the transmitted band of the NR carrier.

[0175] FIG. 19 is a diagram showing the positions of a first signal and a second signal on an NR carrier wave. In FIG. 19, an example is used in which a first frequency region unit is located in one guard band of the NR carrier wave, and a second frequency region unit is located in another guard band of the NR carrier wave. In other words, the first signal is in the guard band of the NR carrier wave, and the second signal is in another guard band of the NR carrier wave. Since both the first signal and the second signal are in the guard band of the NR carrier wave, the transmission of the first signal and the second signal does not affect the transmission in the transmission band of the NR carrier wave.

[0176] In a second case, both the first signal and the second signal are within the transmission bandwidth of the NR carrier wave, the difference between the minimum value of the first frequency region unit and the lowest frequency of the transmission bandwidth is less than or equal to a first value, and the difference between the maximum value of the second frequency region unit and the highest frequency of the transmission bandwidth is less than or equal to a second value. The first value may be 0, and the second value may also be 0. For example, the difference between the minimum value of the first frequency region unit and the lowest frequency of the transmission bandwidth may be 0, and the difference between the maximum value of the second frequency region unit and the highest frequency of the transmission bandwidth may be 0. When the first signal and the second signal are within the transmission bandwidth of the NR carrier wave, the first frequency region unit and the second frequency region unit may be located at both ends of the transmission bandwidth of the NR carrier wave, respectively, in order to guarantee the interference resistance performance of the first signal and the second signal as much as possible. For ease of understanding, figures are used as examples below.

[0177] FIG. 20 is a diagram showing the positions of a first signal and a second signal on an NR carrier wave. In FIG. 20, an example is used in which a first frequency region unit is located at one end of the transmission band of the NR carrier wave, and a second frequency region unit is located at the other end of the transmission band of the NR carrier wave. The first signal and the second signal are at both ends of the NR carrier wave, respectively, and the frequency positions of the first signal and the second signal are close to the guard band of the NR carrier wave. Therefore, the interference resistance performance of the first signal and the second signal can be ensured as much as possible.

[0178] The modulation schemes for the first and second signals are not limited to this embodiment of the present application. The shift keying scheme for the first signal and / or the shift keying scheme for the second signal are on-off shift keying, multi-carrier on-off shift keying, double-sided amplitude shift keying, single-sided amplitude shift keying, phase-inverted amplitude shift keying, multiple amplitude shift keying, frequency shift keying, Gaussian frequency shift keying, multiple frequency shift keying, two-phase shift keying, quadrature phase shift keying, pulse amplitude modulation, pulse width modulation, pulse position modulation, pulse density modulation, or pulse code modulation. The modulation schemes for the first and second signals may be the same or different.

[0179] In possible embodiments, the antenna port of the first signal is the same as the antenna port of the second signal. The cyclic prefix length of the first signal is the same as the cyclic prefix length of the second signal. The subcarrier spacing of the first signal is the same as the subcarrier spacing of the second signal. The waveform of the first signal and / or the waveform of the second signal is OFDM using CP. The waveform of the first signal and / or the waveform of the second signal is OFDM using CP, and DFT spread is performed.

[0180] It will be understood that the first device may transmit a first signal at a first frequency and a second signal at a second frequency. In this way, the second device can receive the first and second signals by envelope detection and distinguish between the DC carrier signal and the interference signal. However, interference changes dynamically. If, in the absence of interference, the first device still transmits the first signal at a first frequency and the second signal at a second frequency, the resource overhead will obviously increase. Therefore, in this embodiment of the present application, in the absence of interference, the first device may alternatively transmit one signal at one frequency position to reduce resource overhead. However, the second device does not know whether the first device transmits two signals or one signal. If the first device transmits two signals and the second device receives the signal based on the case where the first device transmits one signal, the receiving performance of the second device cannot be guaranteed. Similarly, if the first device transmits one signal and the second device receives signals based on the first device transmitting two signals, the receiving performance of the second device cannot be guaranteed.

[0181] Therefore, the first device can instruct the second device on the signal receiving scheme so that both the first and second devices have a consistent understanding of the signal receiving scheme, in order to ensure the receiving performance of the second device.

[0182] S1403: The first device transmits second instruction information to the second device, and in response, the second device receives the second instruction information transmitted by the first device.

[0183] The second instruction information can instruct the second device on how to receive the signal. In this embodiment of the present application, the way the second device receives the signal includes the first receiving method and the second receiving method. Accordingly, the second instruction information can instruct the second device to receive the signal using either the first receiving method or the second receiving method.

[0184] The first receiving method instructs the device to receive the signal based on the absolute difference between the first frequency and the second frequency. The second receiving method instructs the device to receive the signal based on the frequency of the DC carrier and the absolute difference between the first frequency and the second frequency. It will be understood that the first device transmits the first and second signals. For the second device, if there is an interfering signal, the second device can receive the signal at a frequency position obtained by subtracting the second frequency from the first frequency. If there is no interfering signal, the second device can receive the signal at a frequency position obtained by subtracting the second frequency from the first frequency, as well as further receive low-frequency signals near the DC carrier. Thus, the first device can inform the second device of the signal receiving method to ensure the second device's receiving performance as reliable as possible.

[0185] The specific form of the second instruction information is not limited in this embodiment of the present application. For example, the second instruction information may directly indicate the first or second receiving method. For example, the second instruction information may be 1 bit of information. A bit value of "0" indicates the first receiving method, and correspondingly, a bit value of "1" indicates the second receiving method. Alternatively, a bit value of "1" indicates the first receiving method, and correspondingly, a bit value of "0" indicates the second receiving method.

[0186] For example, the second instruction information can indirectly indicate a first or second receiving method. For example, the second instruction information can indicate a signal expansion mode, which includes transmit-band expansion or protection-band expansion. In transmit-band expansion, the signal is transmitted at the frequency of the transmit band. In protection-band expansion, the signal is transmitted at the frequency of the protection band. If the signal expansion mode is protection-band expansion, it may by default be assumed that the first device transmits two signals to indirectly indicate a second receiving method. If the signal expansion mode is transmit-band expansion, it may by default be assumed that the first device transmits one signal to indirectly indicate a first receiving method. In another example, the second instruction information can indicate a frequency difference. The second instruction information indirectly indicates a second receiving method if the frequency difference satisfies certain conditions that the absolute value of the difference between the first frequency and the second frequency must satisfy. If the frequency difference does not satisfy a specific condition that the absolute value of the difference between the first frequency and the second frequency must satisfy, the second instruction information indirectly indicates the first receiving method.

[0187] For ease of understanding, the first and second receiving methods are shown below with reference to the attached drawings. Figures 21 and 22 below use an example where the signal output by the envelope detector in the second device includes the DC carrier component and the mid-frequency component; the high-frequency component is not shown. For details, please refer to the envelope detection principle described above. Details are not repeated in this specification.

[0188] Figure 21 illustrates the transmission of a signal by a first device and the reception of a signal by a second device. In Figure 21, an example is used in which, when interference is present, the first device transmits a first signal at f1 and a second signal at f2, and when there is no interference, the first device transmits a first signal at f1. The second device receives the first and second signals by envelope detection and can acquire a signal, i.e., a target signal, at the position of the frequency difference between the first frequency and the second frequency. The frequency carrying the target signal can also be understood as the absolute value of the difference between the first frequency and the second frequency. When there is no interference, the signal received by the second device is near the DC carrier. From Figure 21, it can be seen that when interference is present, the interfering signal is near the DC carrier. Therefore, the interfering signal can be suppressed by using a band-pass filter. When there is no interference, a low-pass filter can be used for filtering.

[0189] Figure 22 is another diagram illustrating the transmission of a signal by the first device and the reception of a signal by the second device. In Figure 22, in the case of interference, the first device transmits the first signal at f1 and the second signal at f2; in the case of no interference, the first device transmits the first signal at f1 and the second signal at f2. Similar to Figure 21, the second device receives the first and second signals by envelope detection and can acquire the signal, i.e., the target signal, at the position of the frequency difference between the first and second frequencies. In the case of no interference, the signal received by the second device further includes the signal at the position of the frequency difference between the first and second frequencies, in addition to the signal near the DC carrier. From Figure 22, it can be seen that in the case of interference, the interfering signal is near the DC carrier. Therefore, the interfering signal can be suppressed by using a band-pass filter. In the case of no interference, both the signal on the DC carrier and the signal at Δf carry useful information. Therefore, the second device can receive the signal on the DC carrier and the signal at Δf, and then perform filtering by using a low-pass filter, thereby ensuring reliable reception performance for both the first and second signals.

[0190] S1404: The second device receives the first and second signals by envelope detection.

[0191] For details on how the second device receives the signal by envelope detection, please refer to the above-mentioned explanation of the principle of the envelope detector. Details are not repeated herein.

[0192] S1405: The second device acquires the target signal from the received signal.

[0193] A second device can receive a signal at a frequency position based on the second instruction information, or it can be considered that, based on the second instruction information, it can determine the parameters of a filter for filtering the signal output by the envelope detector in order to acquire a target signal.

[0194] In the case of interference, when the method for better suppressing the interference in the present embodiment of the present application was described above, the solution of the filter after the envelope detector was explained. Details are not repeated herein. For the case without interference, a method by which a second device receives a first signal and a second signal and obtains a target signal will be described below.

[0195] Assuming no interference, the input signal x(t) of the envelope detector satisfies the following: x(t)=x sig1 (t)+x sig2 (t) x sig2 (t)=A sig1 (t)×cos(2πf c,sig1 t) and x sig2 (t)=A sig2 (t)×cos(2πf c,sig2 t).

[0196] The output signal y(t) of the envelope detector satisfies the following: y(t)=(x(t)) 2 =(x sig1 (t)+x sig2 (t)) 2

[0197] x sig1 (t) and x sig2 (t) are substituted into the above equations to obtain the following:

Equation

[0198] A sig1 (t) and A sig2 (t) represent the first signal and the second signal respectively, and f c,sig1 and f c,sig2 are the carrier frequencies used for the first signal and the second signal respectively. The output y(t) of the envelope detector has frequencies of 2f c,sig1 , 2f c,sig2 , and f c,sig2 +fc,sig1 It includes the high-frequency components. After the low-pass filter performs filtering on y(t), the target signal

number

number

number

[0199] A sig1 (t)A sig2 (t) × cos(2π(f) c,sig2 -f c,sig1 It will be understood that )t) is a mid-frequency component. To reduce processing complexity and power consumption, the second device may filter out the mid-frequency component by using a band-pass filter and then perform further down-conversion processing on the mid-frequency component that has passed through the band-pass filter to obtain a baseband signal. Embodiments of down-conversion are not limited to the embodiments of this application. For example, the second device may implement down-conversion operation by using an envelope detector, or by using a low-frequency crystal oscillator and frequency mixer. After the down-conversion operation of the second device is performed A sig1 (t) and / or A sig2 Regarding how to reconstruct the information carried by (t), when the down-conversion operation is implemented by using an envelope detector, A sig1 (t) and / or A sig2 A when down-conversion operation is implemented by referring to relevant content to restore the information carried by (t), or by using a low-frequency crystal oscillator and frequency mixer. sig1 (t) and / or A sig2See the relevant information for details on how to reconstruct the information carried by (t). Details are not repeated in this specification.

[0200] According to the solution provided in this embodiment of the present application, a transmitting end device can transmit two signals at two frequency positions, and a receiving end device can receive the two signals through envelope detection without increasing the complexity of designing and implementing radio frequency filters. In addition, the mid-frequency component output by the envelope detector of the second device can be considered the signal that the second device needs to acquire. If interference is present, the interference is present in the high-frequency component, and the mid-frequency component does not contain the interference. This allows the signal on the DC carrier and the interference signal to be distinguished, as only the mid-frequency component passes through the mid-frequency filter. Since the mid-frequency is lower than the radio frequency, the mid-frequency filter is easier to design and implement under the same Q-factor requirements. Therefore, according to the solution in this embodiment of the present application, by using a mid-frequency filter after envelope detection is performed, the target signal and interference can be easily distinguished without increasing the complexity of designing and implementing radio frequency filters.

[0201] In embodiments provided in this application, the methods provided in these embodiments are described separately from the interaction between terminal devices, access network devices, and core network devices. To implement the functions of the aforementioned methods provided in embodiments of this application, terminal devices, access network devices, and core network devices may include hardware structures and / or software modules, and the aforementioned functions may be implemented in the form of hardware structures, software modules, or combinations of hardware structures and software modules. Whether any of the aforementioned functions are performed by using hardware structures, software modules, or combinations of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0202] Embodiments of this application further provide a communication device. A communication device configured to implement the method described above in the embodiments of this application will be described below with reference to the accompanying drawings.

[0203] Figure 23 is a block diagram of a communication device 2300 according to an embodiment of the present application. The communication device 2300 may include a processing module 2310 and a transceiver module 2320. Optionally, a storage unit may also be included. The storage unit may be configured to store instructions (code or programs) and / or data. The processing module 2310 and the transceiver module 2320 may be coupled to the storage unit. For example, the processing module 2310 may read instructions (code or programs) and / or data from the storage unit and implement a corresponding method. The aforementioned modules may be arranged independently, or they may be partially or fully integrated.

[0204] In some possible embodiments, the communication device 2300 can implement corresponding behaviors and functions of the first device in the embodiments of the method described above. The communication device 2300 may be the first device, or a component used in the first device (e.g., a chip or circuit), or a chip or chip group of the first device, or a portion of a chip configured to perform the associated method function. For example, the communication device 2300 may perform steps such as S1401, S1402, and S1403 in Figure 14.

[0205] For example, processing module 2310 is configured to determine a first signal and a second signal. Transceiver module 2320 is configured to transmit the first signal to a second device to a first frequency domain unit and the second signal to a second frequency domain unit. The first frequency domain unit encompasses the first frequency, and the second frequency domain unit encompasses the second frequency. The absolute value of the difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is the bandwidth occupied in the frequency domain by the first frequency domain unit, and the second bandwidth is the bandwidth occupied in the frequency domain by the second frequency domain unit. The third bandwidth is the bandwidth occupied in the frequency domain by the third frequency domain unit, which is used by the first device to transmit a third signal to a third device. The first signal, the second signal, and the third signal are all within the same operating band.

[0206] In an optional embodiment, the transceiver module 2320 is further configured to transmit first instruction information to a second device. The first instruction information indicates the absolute value of the difference between a first frequency and a second frequency.

[0207] In an optional embodiment, the transceiver module 2320 is further configured to transmit a second instruction information to a second device. The second instruction information instructs the second device to receive the signal in a first receiving mode or a second receiving mode. The first receiving mode instructs the device to receive the signal based on the absolute difference between a first frequency and a second frequency. The second receiving mode instructs the device to receive the signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency.

[0208] For further details, please refer to the relevant information in any of the embodiments shown in Figures 14 to 22. Details are not repeated herein.

[0209] For example, processing module 2310 is configured to determine a first signal and a second signal. Transceiver module 2320 is configured to transmit the first signal to a second device to a first frequency domain unit and the second signal to a second frequency domain unit. The first and second signals are in a single operating band. The first frequency domain unit encompasses the first frequency, and the second frequency domain unit encompasses the second frequency. The absolute difference between the first frequency and the second frequency is a preset value. Alternatively, transceiver module 2320 is further configured to transmit the absolute difference between the first frequency and the second frequency to the second device.

[0210] In an optional embodiment, the transceiver module 2320 is further configured to transmit a second instruction information to a second device. The second instruction information instructs the second device to receive the signal in a first receiving mode or a second receiving mode. The first receiving mode instructs the device to receive the signal based on the absolute difference between a first frequency and a second frequency. The second receiving mode instructs the device to receive the signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency.

[0211] For further details, please refer to the relevant information in any of the embodiments shown in Figures 14 to 22. Details are not repeated herein.

[0212] In some other possible embodiments, the communication device 2300 can implement corresponding behaviors and functions of the second device in the embodiments of the method described above. The communication device 2300 may be the second device, or a component used in the second device (e.g., a chip or circuit), or a chip or chip group of the second device, or a portion of a chip configured to perform the associated method function. For example, the communication device 2300 may perform steps such as S1401, S1402, S1403, S1404, and S1405 in Figure 14.

[0213] For example, transceiver module 2320 is configured to receive a first signal and a second signal via envelope detection. Processing module 2310 is configured to acquire a target signal. The frequency carrying the target signal encompasses the absolute difference between a first frequency carrying the first signal and a second frequency carrying the second signal. In another example, transceiver module 2320 is configured to receive a first signal and a second signal via envelope detection. Processing module 2310 is configured to acquire a target signal. The frequency carrying the target signal encompasses the absolute difference between a first frequency carrying the first signal and a second frequency carrying the second signal. The absolute difference between the first and second frequencies is either a preset value or is obtained from a first device.

[0214] In an optional embodiment, the processing module 2310 is further configured to determine a receiving scheme used to acquire a target signal. The receiving scheme encompasses either a first or second receiving scheme. The first receiving scheme instructs the system to receive the signal based on the absolute difference between a first frequency and a second frequency. The second receiving scheme instructs the system to receive the signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency.

[0215] In an optional embodiment, the transceiver module 2320 is further configured to receive second instruction information transmitted by the first device. The second instruction information indicates either the first receiving method or the second receiving method.

[0216] For further details, please refer to the relevant information in any of the embodiments shown in Figures 14 to 22. Details are not repeated herein.

[0217] In this embodiment of the present application, it should be understood that the processing module 2310 may be implemented as a processor or a circuit component associated with a processor, and the transceiver module 2320 may be implemented as a transceiver, a circuit component associated with a transceiver, or a communication interface.

[0218] Figure 24 is a block diagram of a communication device 2400 according to an embodiment of the present application. The communication device 2400 may be a first device and can implement the functions of the first device in the method provided in an embodiment of the present application. Alternatively, the communication device 2400 may be a device that can support the first device when implementing the corresponding functions of the method provided in an embodiment of the present application. The communication device 2400 may be a chip system. In this embodiment of the present application, the chip system may include a chip or include a chip and other discrete components. For specific functions, please refer to the description of the method embodiment above. The communication device 2400 may be a second device and can implement the functions of the second device in the method provided in an embodiment of the present application. Alternatively, the communication device 2400 may be a device that can support the second device when implementing the corresponding functions of the method provided in an embodiment of the present application. The communication device 2400 may be a chip system. In this embodiment of the present application, the chip system may include a chip or include a chip and other discrete components. For specific functions, please refer to the description of the method embodiment above.

[0219] The communication device 2400 comprises one or more processors 2401 configured to implement or support the communication device 2400 when implementing the functions of the first device in the method provided in embodiments of this application. For details, see the detailed description of the example method. Details are not described herein. One or more processors 2401 may be alternatively configured to implement or support the communication device 2400 when implementing the functions of the second device in the method provided in embodiments of this application. For details, see the detailed description of the example method. Details are not described herein. The processors 2401 may also be referred to as processing units or processing modules and may implement specific control functions. The processors 2401 may be general-purpose processors or dedicated processors, etc. For example, the processors may include a central processing unit, an application processor, a modem processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, memory, a neural network processor, etc. The central processing unit may be configured to control the communication device 2400, execute software programs, and / or process data. Different processors may be independent components or may be integrated into one or more processors, for example, into one or more application-specific integrated circuits.

[0220] Optionally, the communication device 2400 includes one or more memories 2402 configured to store instructions 2404. Instructions may be executed by the processor 2401 to enable the communication device 2400 to perform the method described in the embodiments of the above-mentioned method. The memories 2402 and the processor 2401 may be located separately, integrated, or considered to be coupled. The coupling in this embodiment of the application may be an indirect coupling or communication connection between devices, units, or modules in an electrical, mechanical, or other form, used for information exchange between devices, units, or modules. The processor 2401 may work in cooperation with the memories 2402. At least one of the at least one memory may be included in the processor. Note that the memory 2402 is not mandatory and is therefore indicated by a dashed line in Figure 24.

[0221] Optionally, memory 2402 may store further data. The processor and memory may be located separately or integrated together. In this embodiment of the present application, memory 2402 may be non-volatile memory, such as a hard disk drive (HDD) or solid-state drive (SSD), or volatile memory, such as random-access memory (RAM). Memory is any other medium that can carry or store expected program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to such other medium. Alternatively, memory in the embodiments of the present application may be a circuit or any other device configured to implement a storage function and store program instructions and / or data.

[0222] Optionally, the communication device 2400 may contain instructions 2403 (sometimes called code or program), which may be executed by a processor to enable the communication device 2400 to perform the methods described in the above embodiments. The processor 2401 may store data.

[0223] Optionally, the communication device 2400 may further include a transceiver 2405 and / or an antenna 2406. The transceiver 2405 may be called a transceiver unit, transceiver module, transceiver machine, transceiver circuit, transceiver, input / output interface, etc., and is configured to implement the transceiver function of the communication device 2400 via the antenna 2406.

[0224] The processor 2401 and transceiver 2405 described herein may be mounted on integrated circuits (ICs), analog ICs, radio frequency identification (RFID) integrated circuits, mixed-signal ICs, ASICs, printed circuit boards (PCBs), electronic devices, etc. The communication devices described herein may be implemented as standalone devices (e.g., standalone integrated circuits or mobile phones) or as part of a larger device (e.g., modules that can be incorporated into another device). For further details, see the preceding descriptions of terminal devices and network devices. Details are not repeated herein.

[0225] In possible embodiments, the communication device 2400 can implement corresponding behaviors and functions of the first device in the embodiments of the method described above. The communication device 2400 may be the first device, or a component used in the first device (e.g., a chip or circuit), or a chip or chip group of the first device, or a part of a chip configured to perform the associated method function. For example, the communication device 2400 may perform steps such as S1401, S1402, and S1403 in Figure 14.

[0226] For example, processor 2401 is configured to determine a first signal and a second signal. Transceiver 2405 is configured to transmit the first signal to a second device to a first frequency domain unit and the second signal to a second frequency domain unit. The first frequency domain unit encompasses a first frequency, and the second frequency domain unit encompasses a second frequency. The absolute value of the difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth. The first bandwidth is the bandwidth occupied in the frequency domain by the first frequency domain unit, and the second bandwidth is the bandwidth occupied in the frequency domain by the second frequency domain unit. The third bandwidth is the bandwidth occupied in the frequency domain by the third frequency domain unit, which is used by the first device to transmit a third signal to the third device. The first signal, the second signal, and the third signal are all within the same operating band.

[0227] In an optional embodiment, the transceiver 2405 is further configured to transmit first instruction information to a second device. The first instruction information indicates the absolute value of the difference between a first frequency and a second frequency.

[0228] In an optional embodiment, the transceiver 2405 is further configured to transmit a second instruction information to a second device. The second instruction information instructs the second device to receive a signal in a first receiving mode or a second receiving mode. The first receiving mode instructs the device to receive a signal based on the absolute difference between a first frequency and a second frequency. The second receiving mode instructs the device to receive a signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency.

[0229] For further details, please refer to the relevant information in any of the embodiments shown in Figures 14 to 22. Details are not repeated herein.

[0230] For example, processor 2401 is configured to determine a first signal and a second signal. Transceiver 2405 is configured to transmit the first signal to a second device to a first frequency domain unit and the second signal to a second frequency domain unit. The first and second signals are in the same operating band. The first frequency domain unit encompasses the first frequency, and the second frequency domain unit encompasses the second frequency. The absolute difference between the first frequency and the second frequency is a preset value. Alternatively, transceiver 2405 is further configured to transmit the absolute difference between the first frequency and the second frequency to the second device.

[0231] In an optional embodiment, the transceiver 2405 is further configured to transmit a second instruction information to a second device. The second instruction information instructs the second device to receive a signal in a first receiving mode or a second receiving mode. The first receiving mode instructs the device to receive a signal based on the absolute difference between a first frequency and a second frequency. The second receiving mode instructs the device to receive a signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency.

[0232] For further details, please refer to the relevant information in any of the embodiments shown in Figures 14 to 22. Details are not repeated herein.

[0233] In some other possible embodiments, the communication device 2400 can implement corresponding behaviors and functions of the second device in the embodiments of the method described above. The communication device 2400 may be the second device, or a component (e.g., a chip or circuit) used in the second device, or a chip or chip group of the second device, or a part of a chip configured to perform the associated method function. For example, the communication device 2400 may perform steps such as S1401, S1402, S1403, S1404, and S1405 in Figure 14.

[0234] For example, transceiver 2405 is configured to receive a first signal and a second signal through envelope detection. Processing module 2310 is configured to acquire a target signal. The frequency carrying the target signal encompasses the absolute difference between a first frequency carrying the first signal and a second frequency carrying the second signal. In another example, transceiver 2405 is configured to receive a first signal and a second signal through envelope detection. Processor 2401 is configured to acquire a target signal. The frequency carrying the target signal encompasses the absolute difference between a first frequency carrying the first signal and a second frequency carrying the second signal. The absolute difference between the first and second frequencies is either a preset value or is obtained from a first device.

[0235] In an optional embodiment, the processor 2401 is further configured to determine a receiving scheme used to acquire a target signal. The receiving scheme encompasses a first receiving scheme or a second receiving scheme. The first receiving scheme instructs the system to receive the signal based on the absolute difference between a first frequency and a second frequency. The second receiving scheme instructs the system to receive the signal based on the frequency of a DC carrier and the absolute difference between the first frequency and the second frequency.

[0236] In an optional embodiment, the transceiver 2405 is further configured to receive second instruction information transmitted by the first device. The second instruction information indicates either the first receiving method or the second receiving method.

[0237] For further details, please refer to the relevant information in any of the embodiments shown in Figures 14 to 22. Details are not repeated herein.

[0238] Optionally, the communication device 2400 may further include one or more of the following components, namely, a wireless communication module, an audio module, an external memory interface, internal memory, a universal serial bus (USB) interface, a power management module, an antenna, a speaker, a microphone, an input / output module, a sensor module, a motor, a camera, or a display. In some embodiments, it will be understood that the communication device 2400 may include more or fewer components, or that some components may be integrated, or that some components may be separated. Components may be implemented by hardware, software, or a combination of software and hardware.

[0239] It should be noted that the communication device in the above-described embodiment may be a terminal device (or network device), a circuit, a chip used in a terminal device (or network device), or another composite device or component having the functionality of a terminal (or network device). When the communication device is a terminal device (or network device), the transceiver module may be a transceiver, may include an antenna, a radio frequency circuit, etc., and the processing module may be a processor, such as a central processing unit (CPU). When the communication device is a component having the functionality of a terminal device or a network device, the transceiver module may be a radio frequency unit, and the processing module may be a processor. If the communication device is a chip system, it may be a field programmable gate array (FPGA), application-specific integrated circuit (ASIC), system on chip (SoC), CPU, network processor (NP), digital signal processor (DSP), microcontroller unit (MCU), programmable logic device (PLD), or another integrated chip. The processing module may be the processor of the chip system. The transceiver module or communication interface may be the input / output interface or interface circuit of the chip system. For example, the interface circuit may be a code / data read / write interface circuit. The interface circuit may be configured to receive code instructions (which are stored in memory and can be read directly from memory or read from memory via another device) and send code instructions to the processor.The processor may be configured to execute code instructions in order to carry out the method of the embodiment of the method described above. In another example, the interface circuit may instead be a signal transmission interface circuit between the communication processor and the transceiver module.

[0240] If the communication device is a chip-type device or circuit, it may include a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit and / or a communication interface. The processing unit is an integrated processor, microprocessor, or integrated circuit.

[0241] Embodiments of this application further provide a communication system. Specifically, the communication system comprises at least one first device and at least one second device. For example, the communication system comprises a second device and a first device configured to implement one or more associated functions as shown in Figures 14 to 22. For further details, please refer to the relevant description of the embodiments of the method. Details are not repeated herein.

[0242] Embodiments of this application further provide a computer-readable storage medium containing instructions; when the instructions are executed on a computer, the computer is enabled to perform the method performed by the first device in Figure 14. Alternatively, when the instructions are executed on a computer, the computer is enabled to perform the method performed by the second device in Figure 14.

[0243] Embodiments of this application further provide a computer program product that includes instructions; when the instructions are executed on a computer, the computer is enabled to perform the method performed by the first device in Figure 14. Alternatively, when the instructions are executed on a computer, the computer is enabled to perform the method performed by the second device in Figure 14.

[0244] Embodiments of this application provide a chip system. The chip system includes a processor and may further include memory configured to implement the functionality of the first device in the aforementioned method, or to implement the functionality of the second device in the aforementioned method. The chip system may include a chip, or may include a chip and another discrete device.

[0245] It should be understood that the sequential numbering of the processes described above does not imply the order of execution in the various embodiments of this application. The order of execution of the processes should be determined according to the function and internal logic of the processes and should not be construed as any limitation to the embodiment processes of the embodiments of this application.

[0246] Those skilled in the art will recognize that the illustrative logical blocks and steps described with reference to the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the functions described for each specific application, but such embodiments should not be considered beyond the scope of this application.

[0247] For the sake of simplicity, it will be readily apparent to those skilled in the art that the detailed operating processes of the aforementioned systems, apparatus, and units should be referred to in the corresponding processes in the method embodiments described above. Details are not repeated herein.

[0248] It should be understood that in some embodiments provided in this application, the disclosed systems, apparatus, and methods may be implemented in other ways. For example, the embodiments of the described apparatus are merely examples. For example, the division into units is merely a logical functional division, and other divisions may exist in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not performed. In addition, the mutual coupling, direct coupling, or communication connection shown or discussed may be implemented through some interfaces. Indirect coupling or communication connection between apparatus or between units may be implemented in electronic, mechanical or other forms.

[0249] Units described as separate parts may or may not be physically separate, and parts shown as units may or may not be physical units, specifically, they may be located in one location or distributed across multiple network units. Some or all of the units may be selected based on the actual requirements in order to achieve the objectives of the solutions of the embodiments.

[0250] If the functionality is implemented in the form of a software function unit and sold or used as an independent product, the functionality may be stored on a computer-readable storage medium. Based on that understanding, a portion of the technical solution of this application, or a part of the technical solution, may be embodied in the form of a software product. The computer software product is stored on a storage medium and contains several instructions for enabling a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method of the embodiment of this application. The aforementioned storage medium includes any medium capable of storing program code, such as a USB flash drive, removable hard disk, read-only memory (ROM), RAM, magnetic disk, or optical disk.

[0251] It is clear that a person skilled in the art can make various modifications and variations to this application, provided they do not deviate from the scope of this application. This application is intended to cover such modifications and variations to the extent that they fall within the scope of protection provided by the following claims and their equivalents. [Explanation of Symbols]

[0252] 2300 Communication equipment 2310 Processing Module 2320 Transceiver Module 2400 Communication equipment 2401 Processor 2402 memory 2403 Command 2404 Command 2405 Transceiver 2406 Antenna

Claims

1. A method of transmitting signals, The first device determines the first signal and the second signal, Steps of the first device to transmit the first signal to a second device to a first frequency domain unit and the second signal to a second frequency domain unit, wherein the first frequency domain unit includes a first frequency, the second frequency domain unit includes a second frequency, and the absolute difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth, wherein the first bandwidth is the bandwidth occupied by the first frequency domain unit in the frequency domain, the second bandwidth is the bandwidth occupied by the second frequency domain unit in the frequency domain, and the third bandwidth is the bandwidth occupied by the third frequency domain unit in the frequency domain, the third frequency domain unit is used by the first device to transmit a third signal to a third device, and the first signal, the second signal, and the third signal are in a single operating band, and A step of transmitting second instruction information to a second device by the first device, wherein the second instruction information instructs the second device to receive a signal in a first receiving method or a second receiving method, the first receiving method being a method of receiving a signal based on the absolute value of the difference between the first frequency and the second frequency, and the second receiving method being a method of receiving a signal based on the frequency of a DC carrier wave and the absolute value of the difference between the first frequency and the second frequency. A signal transmission method, including the transmission method.

2. The method according to claim 1, wherein the first device transmits the first signal and the second signal within a frequency range corresponding to the channel bandwidth of the second device, and the absolute value of the difference between the first frequency and the second frequency is 1 / 2 or more of the channel bandwidth of the second device.

3. The method according to claim 1, wherein the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the sum of the third bandwidth and the fourth bandwidth, the fourth bandwidth is twice the sum of the first bandwidth and the second bandwidth, and the third signal is between the first frequency and the second frequency in the frequency domain.

4. The method according to claim 1, wherein the absolute value of the difference between the first frequency and the second frequency is a preset value; or the method further comprises the step of transmitting first instruction information from the first device to the second device, wherein the first instruction information indicates the absolute value.

5. The method according to claim 4, wherein the absolute value of the difference between the first frequency and the second frequency is the preset value, and the preset value is associated with one or more of the following: the operating bandwidth, the subcarrier interval of the first signal, or the subcarrier interval of the second signal.

6. The method according to claim 1, wherein up to one of the first signal and the second signal is used to provide a carrier for uplink transmission of the second device.

7. The method according to claim 1, wherein the power of the first signal is the same as the power of the second signal.

8. The method according to claim 7, wherein neither the first signal nor the second signal is used to provide a carrier for uplink transmission of the second device.

9. The method according to claim 1, wherein at least one of the first signal and the second signal is in the protection band of a first carrier, and / or the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the transmission bandwidth of one first carrier, and the first carrier is a new radio NR carrier or a long-term evolution LTE carrier.

10. A method for receiving signals, A second device receives a first signal and a second signal by envelope detection, wherein the first signal and the second signal are in one operating band. The steps of the second device receiving second instruction information transmitted by the first device and determining a receiving method to be used to acquire a target signal, wherein the second instruction information indicates a first receiving method or a second receiving method, the first receiving method being a method of receiving a signal based on the absolute value of the difference between a first frequency carrying the first signal and a second frequency carrying the second signal, and the second receiving method being a method of receiving a signal based on the frequency of a DC carrier and the absolute value of the difference between the first frequency and the second frequency, A step of acquiring the target signal by the second device, wherein the frequency for carrying the target signal includes the absolute difference between the first frequency for carrying the first signal and the second frequency for carrying the second signal, and the frequency of the DC carrier wave. A signal reception method, including the following.

11. The method according to claim 10, wherein the absolute value of the difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth, the first bandwidth being the bandwidth occupied in the frequency domain by a first frequency domain unit, the first frequency domain unit comprising the first frequency; the second bandwidth being the bandwidth occupied in the frequency domain by a second frequency domain unit, the second frequency domain unit comprising the second frequency; and the third bandwidth being the bandwidth occupied in the frequency domain by a third frequency domain unit, the third frequency domain unit being used by the first device to transmit a third signal to a third device, the third signal being in the operating bandwidth.

12. The method according to claim 11, wherein the first signal and the second signal are transmitted within a frequency range corresponding to the channel bandwidth of the second device, and the absolute value of the difference between the first frequency and the second frequency is 1 / 2 or more of the channel bandwidth of the second device.

13. The method according to claim 11, wherein the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the sum of the third bandwidth and the fourth bandwidth, the fourth bandwidth is twice the sum of the first bandwidth and the second bandwidth, and the third signal is between the first frequency and the second frequency in the frequency domain.

14. The method according to claim 10, wherein the absolute value of the difference between the first frequency and the second frequency is a preset value; or the method further comprises the step of the second device receiving first instruction information transmitted by the first device, wherein the first instruction information indicates the absolute value.

15. The method according to claim 14, wherein the absolute value of the difference between the first frequency and the second frequency is the preset value, and the preset value is associated with one or more of the following: the operating bandwidth, the subcarrier interval of the first signal, or the subcarrier interval of the second signal.

16. The method according to claim 10, wherein up to one of the first signal and the second signal is used to provide a carrier for uplink transmission of the second device.

17. The method according to claim 10, wherein the power of the first signal is the same as the power of the second signal.

18. The method according to claim 17, wherein neither the first signal nor the second signal is used to provide a carrier for uplink transmission of the second device.

19. The method according to claim 10, wherein at least one of the first signal and the second signal is in the protection band of a first carrier, and / or the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the transmission bandwidth of a first carrier, and the first carrier is a new radio NR carrier or an LTE carrier.

20. A communication device comprising a processing module and a transceiver module, wherein the processing module is configured to determine a first signal and a second signal. The transceiver module is configured to transmit the first signal to a second device to a first frequency domain unit, and the second signal to a second device to a second frequency domain unit, wherein the first frequency domain unit includes a first frequency, the second frequency domain unit includes a second frequency, and the absolute difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth, wherein the first bandwidth is the bandwidth occupied in the frequency domain by the first frequency domain unit, the second bandwidth is the bandwidth occupied in the frequency domain by the second frequency domain unit, the third bandwidth is the bandwidth occupied in the frequency domain by the third frequency domain unit, and the third signal is a signal transmitted by the first device to the third frequency domain unit, wherein the first signal, the second signal, and the third signal are in a single operating band. The transceiver module is further configured to transmit a second instruction to the second device, the second instruction being an instruction to the second device to receive a signal in a first receiving mode or a second receiving mode, the first receiving mode being a mode in which the signal is received based on the absolute value of the difference between the first frequency and the second frequency, and the second receiving mode being a mode in which the signal is received based on the frequency of a DC carrier and the absolute value of the difference between the first frequency and the second frequency. Communication device.

21. The apparatus according to claim 20, wherein the transceiver module transmits the first signal and the second signal within a frequency range corresponding to the channel bandwidth of the second device, and the absolute value of the difference between the first frequency and the second frequency is 1 / 2 or more of the channel bandwidth of the second device.

22. The apparatus according to claim 20, wherein the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the sum of the third bandwidth and the fourth bandwidth, the fourth bandwidth is twice the sum of the first bandwidth and the second bandwidth, and the third signal is between the first frequency and the second frequency in the frequency domain.

23. The apparatus according to claim 20, wherein the absolute value of the difference between the first frequency and the second frequency is a preset value; or the transceiver module is further configured to transmit first instruction information to the second device, wherein the first instruction information indicates the absolute value.

24. The apparatus according to claim 23, wherein the absolute value of the difference between the first frequency and the second frequency is the preset value, and the preset value is associated with one or more of the following: the operating bandwidth, the subcarrier interval of the first signal, or the subcarrier interval of the second signal.

25. The apparatus according to claim 20, wherein up to one of the first signal and the second signal is used to provide a carrier wave for uplink transmission of the second device.

26. The apparatus according to claim 20, wherein the power of the first signal is the same as the power of the second signal.

27. The apparatus according to claim 26, wherein neither the first signal nor the second signal is used to provide a carrier for uplink transmission of the second device.

28. The apparatus according to claim 20, wherein at least one of the first signal and the second signal is in the protection band of a first carrier, and / or the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the transmission bandwidth of a first carrier, and the first carrier is a new radio NR carrier or a long-term evolution LTE carrier.

29. A communication device including a processing module and a transceiver module, The transceiver module is configured to receive a first signal and a second signal through envelope detection, and the first signal and the second signal are in one operating band. The transceiver module is further configured to receive second instruction information transmitted by the first device, the second instruction information instructing either a first receiving method or a second receiving method. The processing module is configured to determine a receiving method used to acquire a target signal, wherein the receiving method includes the first receiving method or the second receiving method, the first receiving method being a method of receiving a signal based on the absolute value of the difference between a first frequency carrying the first signal and a second frequency carrying the second signal, and the second receiving method being a method of receiving a signal based on the frequency of a DC carrier and the absolute value of the difference between the first frequency and the second frequency. The processing module is further configured to acquire the target signal, and the frequency for carrying the target signal includes the absolute difference between the first frequency for carrying the first signal and the second frequency for carrying the second signal, and the frequency of the DC carrier wave. Communication device.

30. The apparatus according to claim 29, wherein the absolute value of the difference between the first frequency and the second frequency is associated with one or more of the following: a first bandwidth, a second bandwidth, or a third bandwidth, the first bandwidth being the bandwidth occupied in the frequency domain by a first frequency domain unit, the first frequency domain unit comprising the first frequency; the second bandwidth being the bandwidth occupied in the frequency domain by a second frequency domain unit, the second frequency domain unit comprising the second frequency; and the third bandwidth being the bandwidth occupied in the frequency domain by a third frequency domain unit, the third frequency domain unit being used by the first device to transmit a third signal to a third device, the third signal being in the operating bandwidth.

31. The apparatus according to claim 30, wherein the first signal and the second signal are transmitted within a frequency range corresponding to the channel bandwidth of the communication device, and the absolute value of the difference between the first frequency and the second frequency is 1 / 2 or more of the channel bandwidth of the communication device.

32. The apparatus according to claim 30, wherein the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the sum of the third bandwidth and the fourth bandwidth, the fourth bandwidth is twice the sum of the first bandwidth and the second bandwidth, and the third signal lies between the first frequency and the second frequency in the frequency domain.

33. The apparatus according to claim 29, wherein the absolute value of the difference between the first frequency and the second frequency is a preset value; or the transceiver module is further configured to receive first instruction information transmitted by a first device, wherein the first instruction information indicates the absolute value.

34. The apparatus according to claim 33, wherein the absolute value of the difference between the first frequency and the second frequency is the preset value, and the preset value is associated with one or more of the following: the operating bandwidth, the subcarrier interval of the first signal, or the subcarrier interval of the second signal.

35. The apparatus according to claim 29, wherein up to one of the first signal and the second signal is used to provide a carrier wave for uplink transmission of the communication device.

36. The apparatus according to claim 29, wherein the power of the first signal is the same as the power of the second signal.

37. The apparatus according to claim 29, wherein neither the first signal nor the second signal is used to provide a carrier wave for uplink transmission of the communication device.

38. The apparatus according to claim 29, wherein at least one of the first signal and the second signal is in the protection band of a first carrier, and / or the absolute value of the difference between the first frequency and the second frequency is greater than or equal to the transmission bandwidth of a first carrier, and the first carrier is a new radio NR carrier or an LTE carrier.

39. A communication device comprising a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to execute the computer program stored in the memory in order for the communication device to perform the method according to any one of claims 1 to 9.

40. The communication device according to claim 39, wherein the communication device is a chip or a chip system.

41. A communication device comprising a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to execute the computer program stored in the memory in order for the communication device to perform the method according to any one of claims 10 to 19.

42. The communication device according to claim 41, wherein the communication device is a chip or a chip system.

43. A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer performs the method according to any one of claims 1 to 9.

44. A computer-readable storage medium, the computer-readable storage medium storing a computer program, wherein when the computer program is executed by a computer, the computer performs the method according to any one of claims 10 to 19.

45. A computer program wherein, when the computer program is executed by a computer, the computer performs the method according to any one of claims 1 to 9.

46. A computer program wherein, when the computer program is executed by a computer, the computer performs the method according to any one of claims 10 to 19.

Images