Signal processing methods and related apparatus

Abstract

Provided in the embodiments of the present application are signal processing methods and a related apparatus. A method comprises: receiving N OFDM symbols, wherein said OFDM symbols are carried on the same resource block, the same resource block comprises M subcarriers, the M subcarriers comprise K energy-charging subcarriers, each energy-charging subcarrier carries one energy-charging symbol, subsequences corresponding to K energy-charging symbols are obtained by splitting an energy-charging symbol sequence, the length of the energy-charging symbol sequence is M, both N and M are positive integers, and K is less than or equal to M; and acquiring an energy-charging signal on the basis of the N OFDM symbols, a duration in which power in an energy-charging waveform corresponding to the energy-charging signal is greater than a power threshold value being greater than a time threshold value. Using the embodiments of the present application can prolong the duration of energy-charging waveforms, thereby improving the efficiency of collecting radio frequency energy.

Description

Signal processing method and related apparatus

[0001] This application claims priority from the Chinese patent application No. 202411003808.5 filed on July 24, 2024, and entitled "Signal processing method and related apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, in particular to a signal processing method and related apparatus. BACKGROUND

[0003] With the development of wireless networks and the increase of service demand, there are a large number of internet of things (IoT) devices in the network. These IoT devices are low in cost and small in size, and cannot carry large-capacity batteries, facing the problem of short standby life. In order to solve the problem of short standby life of IoT devices, some people propose to use environmental energy collection method to provide energy for IoT devices. Wireless radio frequency energy is one of the candidate energy sources, which has the advantages of controllable energy size and energy source, and has certain penetration and long transmission distance.

[0004] It is found through research that under the same transmit power, the peak power of the multi-tone waveform is higher than that of the single-tone waveform, so the energy of the multi-tone waveform is more easily collected by the receiving end. However, the duration of the peak power of the multi-tone waveform is short, even shorter than the circuit response time of the receiving end (such as the rectifier of the receiving end), resulting in insufficient radio frequency energy collection. SUMMARY

[0005] Embodiments of the present application disclose a signal processing method and related apparatus, which can improve the duration of the energy charging waveform and improve the efficiency of collecting radio frequency energy.

[0006] In a first aspect, embodiments of the present application disclose a signal processing method, comprising: receiving N orthogonal frequency division multiplexing (OFDM) symbols, each of the OFDM symbols being carried on the same resource block, the same resource block comprising M subcarriers, the M subcarriers comprising K energy charging subcarriers, each of the energy charging subcarriers carrying an energy charging symbol, and a subsequence corresponding to the K energy charging symbols being obtained by splitting an energy charging symbol sequence, the energy charging symbol sequence having a length of M, N and M being positive integers, and K being less than or equal to M; and obtaining an energy charging signal based on the N OFDM symbols, the energy charging signal corresponding to an energy charging waveform in which the duration of a power greater than a power threshold is greater than a time threshold. In this way, the duration of the energy charging waveform can be improved, and the efficiency of collecting radio frequency energy can be improved.

[0007] In a second aspect, the embodiments of the present application disclose another signal processing method, comprising: obtaining N orthogonal frequency division multiplexing (OFDM) symbols, each of the OFDM symbols being carried on a same resource block, the same resource block comprising M subcarriers, the M subcarriers comprising K energizing subcarriers, a subsequence corresponding to the K energizing subcarriers being obtained by splitting an energizing symbol sequence, a length of the energizing symbol sequence being M, N and M being positive integers, and K being less than or equal to M; and transmitting the N OFDM symbols through N antennas, the N OFDM symbols being used to obtain an energizing signal, a duration of a power greater than a power threshold in an energizing waveform corresponding to the energizing signal being greater than a time threshold, and each of the antennas transmitting one of the OFDM symbols. In this way, the duration of the energizing waveform can be increased, and the efficiency of collecting radio frequency energy can be improved.

[0008] With reference to the first aspect or the second aspect, in some possible examples, the energizing symbol sequence is obtained by modulating a bit sequence and then performing fast Fourier transform (FFT) on the modulated bit sequence, and the modulation comprises amplitude modulation and / or phase modulation.

[0009] With reference to the first aspect or the second aspect, in some possible examples, the energizing symbol sequence is obtained by performing FFT on a time domain symbol, and the time domain symbol is obtained by sampling a predefined energizing waveform, and a number of sampling points of the sampling is M.

[0010] With reference to the first aspect or the second aspect, in some possible examples, the energizing waveform comprises at least one of a rectangular wave, a square wave, a trapezoidal wave and a ladder wave.

[0011] With reference to the first aspect or the second aspect, in some possible examples, when the subsequence is obtained by splitting the energizing symbol sequence according to length, K < M.

[0012] With reference to the first aspect or the second aspect, in some possible examples, when the subsequence is obtained by splitting the energizing symbol sequence according to value, K = M.

[0013] With reference to the first aspect, in some possible examples, the method further comprises: obtaining a rectification efficiency of the energizing signal; and transmitting first information, the first information being used to adjust the energizing waveform, the first information comprising the rectification efficiency, and / or an adjustment parameter of the energizing waveform determined according to the rectification efficiency or an adjustment ratio of the adjustment parameter. In this way, the duration and / or power of the power of the energizing waveform corresponding to the energizing signal can be adjusted according to the feedback information, and the energizing efficiency can be improved.

[0014] In some possible examples, in combination with the second aspect, the first information comprises at least one of the rectification efficiency, and an adjustment parameter of the charging waveform or an adjustment ratio of the adjustment parameter determined by the rectification efficiency. In this way, the duration and / or power of the charging waveform corresponding to the charging signal can be adjusted according to the feedback information, and the charging efficiency can be improved.

[0015] In some possible examples, in combination with the first aspect or the second aspect, the adjustment parameter comprises at least one of a duty cycle, a power, and a duration. It can be understood that, by increasing the duration of the power of the charging waveform, the probability of the receiving end obtaining radio frequency energy can be improved, and the charging efficiency can be improved. By increasing the power of the charging waveform, the radio frequency energy obtained by the receiving end can be improved, and the charging efficiency can be improved. By increasing the duty cycle of the charging waveform, the duration of the power of the charging waveform can be increased, and the charging efficiency can be improved.

[0016] In a third aspect, an embodiment of the present application discloses a communication apparatus, which includes units or modules or means for performing the steps of the method in the first aspect or the second aspect or any possible implementation of the method.

[0017] In a fourth aspect, an embodiment of the present application discloses another communication apparatus, which can be a terminal device or a network device. The communication apparatus can include a processor configured to cause the communication apparatus to perform the method in any of the aspects or possible examples described above by executing instructions in a memory or by a logic circuit.

[0018] In some possible examples, the communication apparatus further includes one or more of a memory or a transceiver configured to transceive data and / or signaling.

[0019] In a fifth aspect, an embodiment of the present application provides a communication system including a terminal device and a network device, and when the terminal device and the network device operate in the communication system, the terminal device and the network device are configured to perform the method in any of the aspects or possible examples described above.

[0020] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium having instructions stored thereon, and when the instructions are executed by a processor, the method in any of the aspects or possible examples described above is performed.

[0021] In a seventh aspect, an embodiment of the present application provides a computer program product including instructions, and when the instructions are executed by a processor, the method in any of the aspects or possible examples described above is performed.

[0022] In an eighth aspect, the present application provides a chip comprising a processor and a memory, the processor being configured to invoke and run instructions stored in the memory, so that a communication device installed with the chip performs the method of any one of the above aspects or possible examples.

[0023] In a ninth aspect, the present application provides another chip comprising an input interface, an output interface and a processing circuit, the input interface, the output interface and the processing circuit being connected through internal connection paths, and the processing circuit being configured to perform the method of any one of the above aspects or possible examples. Optionally, the chip further comprises a memory. The input interface, the output interface, the processor and the memory are connected through internal connection paths, and the processor is configured to execute codes in the memory, and when the codes are executed, the processor is configured to perform the method in any one of the above aspects or possible examples.

[0024] In a tenth aspect, the present application provides a chip system comprising at least one processor and a communication interface, the communication interface and the at least one processor being connected through a line, and the at least one processor being configured to run a computer program or instructions to perform the method in any one of the above aspects or possible examples.

[0025] It should be understood that the implementation and benefits of the above aspects can be referred to each other. BRIEF DESCRIPTION OF DRAWINGS

[0026] The following describes the drawings used in the embodiments of the present application.

[0027] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0028] FIG. 2 is a schematic diagram of an architecture of an O-RAN system according to an embodiment of the present application;

[0029] FIG. 3 is a schematic diagram of an architecture of a RAN chip according to an embodiment of the present application;

[0030] FIG. 4 is a schematic diagram of a principle of radio frequency energy collection according to an embodiment of the present application;

[0031] FIG. 5 is a schematic diagram of power variation of a single tone waveform and a multi-tone waveform according to the prior art;

[0032] FIG. 6 is a schematic diagram of an application scenario of a signal processing method according to an embodiment of the present application;

[0033] FIG. 7 is a schematic diagram of interaction of an information processing method according to an embodiment of the present application;

[0034] FIG. 8 is a schematic diagram of a flow of a signal processing method according to an embodiment of the present application;

[0035] FIG. 9A or FIG. 9B is a flow diagram of mapping symbols in a subcarrier to OFDM symbols, according to embodiments of the present disclosure;

[0036] FIG. 10 is a diagram of power variation of a charging waveform, according to embodiments of the present disclosure;

[0037] FIG. 11 is an interaction diagram of another signal processing method, according to embodiments of the present disclosure;

[0038] FIG. 12 is a diagram of a structure of a communication apparatus, according to embodiments of the present disclosure;

[0039] FIG. 13 is a diagram of a structure of another communication apparatus, according to embodiments of the present disclosure;

[0040] FIG. 14 is a diagram of a structure of a terminal device, according to embodiments of the present disclosure. DETAILED DESCRIPTION

[0041] The technical solutions of the embodiments of the present disclosure can be applied to various communication systems, for example, a long term evolution (LTE) communication system, a new radio (NR) communication system, a long term evolution advanced (LTE-A) communication system, a device-to-device (D2D) communication system, a vehicle to everything (V2X) communication system, a machine to machine (M2M) communication system, an Internet of Things (IoT) communication system, a narrow band-IoT (NB-IoT) communication system, a cognitive communication integrated system, a frequency division duplex (FDD) communication system, a time division duplex (TDD) communication system, a non-terrestrial network (NTN) communication system, a wireless projection communication system, an integrated access and backhaul (IAB) communication system, a public land mobile network (PLMN) communication system, a non-public network (NPN) communication system, and a communication system evolved after a 5G communication system (for example, a 6G communication system), or a non-(3rd generation partnership project, 3GPP) communication system, etc., without limitation.

[0042] Exemplarily, refer to FIG. 1, which is a schematic diagram of an architecture of a communication system. As shown in FIG. 1, the communication system can include at least one terminal device and at least one network device. The terminal device and the network device can be in a fixed state or in a mobile state. The terminal device and the network device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted, etc. The terminal device and the network device can also be deployed on the water surface (such as ships, etc.), in the air (such as airplanes, balloons, and satellites, etc.), etc. The location of the terminal device and the network device is not limited in the present application.

[0043] The terminal device and the network device can communicate with each other through a wireless link, that is, the network device can send signals to the terminal device, and the terminal device can also send signals to the network device, so that the terminal device can perform uplink (UL) communication or downlink (DL) communication with the network device. Exemplarily, each network device can provide communication coverage for a specific geographic area, and can communicate with terminal devices located in the coverage area. For example, the network device can send configuration information to the terminal device, and the terminal device can send uplink data to the network device based on the configuration information. For another example, the network device can send downlink data to the terminal device.

[0044] The terminal devices can communicate directly with each other. For example, the direct communication between the terminal devices can be implemented by using a D2D technology, etc., so that the terminal devices can perform sidelink (SL) communication.

[0045] The terminal device and the network device, the network devices, and the terminal devices can communicate through a licensed spectrum, or can communicate through an unlicensed spectrum, or can communicate through both the licensed spectrum and the unlicensed spectrum. The spectrum resources used by the terminal device and the network device are not limited in the present application.

[0046] It should be understood that the number and types of the network devices and the terminal devices included in the network architecture shown in FIG. 1 are only an example, and the embodiments of the present application are not limited thereto. For example, more or fewer terminal devices can be included to communicate with the network devices. For another example, more or fewer network devices can be included to communicate with the terminal devices. For the sake of simplicity, they are not described one by one in the drawings.

[0047] In the following, the parts of the network architecture are described respectively.

[0048] 1. The terminal device is an entity on the user side for receiving or transmitting signals, which can provide voice and / or data for users.

[0049] A terminal device can also be referred to as a terminal, a user equipment (UE), an access terminal, a UE unit, a UE station, a mobile device, a mobile station, a mobile station, a mobile terminal, a mobile client, a mobile unit, a remote station, a remote terminal, a remote unit, a wireless unit, a wireless communication device, a user agent, or a user device, etc. Among them, the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wireless local loop (WLL) station, a personal digital assistant (PDA), a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a handheld device with wireless communication function, a computing device, or other processing device connected to a wireless modem, an on-board device, a wearable device, a terminal in future 5G communication system, or a terminal in future evolved PLMN, or a terminal in future NPN, a device in zigbee network, a device in long range radio (Lora) network, etc. Hereinafter, it is sometimes simply referred to as a terminal.

[0050] The terminal device can also be a terminal device in an IoT communication system, which can also be referred to as an IoT node. IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection. Connection can be through broadband technology or through narrowband technology. IoT technology can achieve mass connection, deep coverage and terminal power saving through, for example, narrowband technology. IoT technology includes reflective communication technology, spread spectrum technology, ultra wide band (UWB), etc., which will not be described here.

[0051] In the embodiments of the present application, the device for implementing the function of the terminal can be a terminal, or a device capable of supporting the terminal to implement the function, such as a chip system, or a communication module, or a modem, etc., which can be installed in the terminal. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the terminal is the terminal, and taking the terminal as an example of UE, the technical solutions provided in the embodiments of the present application are described. The embodiments of the present application do not specifically limit the specific technology and specific device form adopted by the terminal device.

[0052] 2. Network device, a kind of entity for transmitting or receiving signal on network side, for providing access function device for terminal device. One network device can serve one or more terminal devices at the same time. One terminal device can also access one or more network devices at the same time.

[0053] The network device can be an access network (AN) device, which can also be referred to as a radio access network (RAN) device, or simply an access network. It is a node or device that connects the terminal device to the wireless network. That is, the access network provides access services for the terminal device to access (or access) the network. The access network can support wired access and also support wireless access.

[0054] Optionally, the access network is composed of multiple AN / RAN nodes. The AN / RAN nodes can include, but are not limited to, an access point (AP), an enhanced nodeB (eNB), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), a next generation base station (NR nodeB, gNB), a transmission reception point (TRP), a transmission point (TP), or some other access node, such as a wireless relay node, a wireless backhaul node, etc. The AN / RAN node can also be a zigbee base station, a bluetooth (BT), a BT master, a bluetooth low energy (BLE) master, a BLE master, a Lora base station, a wireless fidelity (Wi-Fi) access point. The AN / RAN node can also be one or more constituent antenna panels, or can also be a network node constituting a gNB or a transmission point, such as a BBU or a distributed unit (DU), etc., or can be a device assuming a RAN function in a D2D, V2X, M2M, U2U, etc. communication system, etc. The AN / RAN node can also be a wireless controller in a cloud radio access network (CRAN) scenario, or can be an open RAN (O-RAN or ORAN), or can be an access network in a communication system evolved after the 5G communication system, such as an xNodeB in a 6G communication system, or can be an access network in a PLMN network evolved after the 5G communication system, etc., without limitation.

[0055] Optionally, the network device can also include a core network (CN) device, a data network device, etc.

[0056] In different communication systems, the core network device (hereinafter referred to as core network) can correspond to different devices. For example, in a 3G communication system, it can correspond to a serving GPRS support node (SGSN) and / or a gateway GPRS support node (GGSN); in a 4G communication system, it can correspond to a mobility management entity (MME) and / or a serving gateway (S-GW); in a 5G communication system, it can correspond to the above-mentioned policy control function (PCF) network element, unified data management (UDM) network element, application function (AF) network element, access and mobility management function (AMF) network element, session management function (SMF) network element, location management function (LMF) network element, user plane function (UPF) network element, etc.

[0057] In the embodiments of the present application, the data network device can be referred to as a data network for short. The data network is used to provide service to users. Generally, the client is a terminal, and the server is a data network. The data network provided by the data network can include a private network, such as a local area network. The data network can also include an external network not managed by an operator, such as the Internet. The data network can also include a proprietary network jointly deployed by an operator, such as a network providing internet protocol multimedia subsystem (IMS) services.

[0058] The network device can also be referred to as a base station device. In the embodiments of the present application, the device for implementing the function of the network device can be a network device; it can also be a device capable of supporting the network device to implement the function, such as a chip system, or a communication module, or a modem, etc., which can be installed in the network device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0059] The terminal device and the network device (for example, an access network device) can communicate with each other by using air interface resources corresponding to an air interface technology (such as an NR or LTE technology).

[0060] The network device in the embodiments of the present application can be an integrated base station, or can be a base station including a centralized unit (CU) and / or a distributed unit (DU). The base station including the CU and the DU can also be referred to as a base station separated into a CU and a DU, such as a base station including a gNB-CU and a gNB-DU. The CU can also be separated into a CU control plane (CU-CP) and a CU user plane (CU-UP), such as a base station including a gNB-CU-CP, a gNB-CU-UP, and a gNB-DU. Alternatively, the network device in the embodiments of the present application can also be a radio unit (RU). Alternatively, the network device in the embodiments of the present application can also be an open radio access network (O-RAN) architecture, and the like, and the specific deployment mode of the network device is not limited in the embodiments of the present application.

[0061] For example, when the network device is an O-RAN architecture, the network device shown in the embodiments of the present application can be an access network device in the O-RAN, such as one or more of a CU, a DU, or a RU, or a module in the access network device, and the like.

[0062] Exemplarily, reference can be made to FIG. 2, which is a schematic diagram of an architecture of an O-RAN system provided in the embodiments of the present application. As shown in FIG. 2, a baseband unit (BBU) in an access network device communicates with a core network device, and a radio unit (RU) in the access network device communicates with at least one terminal device. The BBU and the core network device can communicate through a backhaul link, and the BBU and the RU can communicate through a fronthaul link. The BBU and the RU can be co-located or can not be co-located. The RU and the terminal device can communicate through an air interface.

[0063] The BBU includes at least one centralized unit (CU) and at least one distributed unit (DU), and they can communicate through at least one midhaul link. In the O-RAN system, the CU can also be referred to as an open (O)-CU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU.

[0064] The CU is configured to perform functions of upper layers, such as layer 2 (L2) and layer 3 (L3). The fronthaul and backhaul interfaces are configured to carry traffic or information between the CU and the DU, and between the CU and the core network device. The DU is configured to perform functions of layer 1 (L1) and part of L2, and the RU is configured to perform L1 computation and radio frequency (RF) digital part functions. The front-haul and backhaul interfaces are configured to carry traffic or information between the RU and the DU, and between the CU and the DU. The integrated DU includes the functions of the DU and the RU described above.

[0065] The hardware of the CU or the DU can include a chassis platform, a mainboard, peripheral devices, and cooling devices, and the like. The mainboard includes a processing unit, a memory, internal input or output (I / O) interfaces, and external connection ports. The CU or the DU has an interface of a hardware accelerator, and the hardware function components include storage of software, hardware, and system debugging interfaces, and a board management controller.

[0066] The DU is usually implemented using a multi-core processor and one or more hardware accelerators. Part of the DU protocol stack can be implemented in software running on the multi-core processor, for example, computation-intensive functions in L1 and L2 can be implemented based on software running on a hardware accelerator of a field programmable gate array (FPGA) or a graphics processing unit (GPU); or all functions of L1 can be implemented based on software running on a hardware accelerator of an FPGA / GPU, while other protocol stack contents are implemented in software running on the processor; or all protocol stacks are implemented in software running on the processor. The hardware accelerator supports interconnection with an x86 or non-x86 processor, and the accelerator has a multi-lane peripheral component interconnect express (PCIe) interface pointing to a central processing unit (CPU) and is externally connected through a gigabit ethernet (GigE or called a gigabit Ethernet) connection.

[0067] Further, please refer to FIG. 3, which is a schematic diagram of an architecture of a RAN chip provided in an embodiment of the present application. The RAN chip can be applied to the O-RAN system shown in FIG. 2. As shown in FIG. 3, the CU and the DU include a processor and an accelerator, which can be specifically referred to the description of FIG. 2, and will not be repeated here.

[0068] The RU includes three parts: an open access network (O-RAN Processing Unit, OPU) processing unit, a digital processor (O-RU digital processing unit, DPU), and an RF processing unit. Among them, the OPU receives the enhanced common public radio interface (eCPRI) frame from the O-RAN front-end, and performs functions such as front-end interface, the lowest layer L1 (encoding, scrambling, modulation, layer mapping, precoding), synchronization, beamforming, and resource unit mapping. The OPU can be implemented as a CPU, FPGA, or application specific integrated circuit (ASIC).

[0069] The digital processor performs synchronization, digital up converters (DUC), digital downlink converters (DDC), crest factor reduction (CFR), and digital pre-distortion (DPD) to improve power amplifier efficiency by reducing the peak to average power ratio (PAPR) or adjacent channel leakage ratio (ACLR) of the RF front-end; the DPU can be implemented as an FPGA or ASIC.

[0070] The RF processing unit includes a transceiver module, an upconverter, a downconverter, a power amplifier (PA), a low noise amplifier (LNA), a transmit filter, or a receive filter. All conversions between the analog and digital domains (digital-to-analog converter (DAC) and analog-to-digital converter (ADC)) (for example, (RF sampling, using RF in upconversion and downconversion, frequency conversion using intermediate frequency (IF) and local oscillator (LO) mixing)) are performed within the transceiver module. Note that the physical and logical partitions within the RF processing unit do not require specific boundaries.

[0071] In some embodiments, the network device and the terminal device can also be referred to as a communication apparatus, which can be a general-purpose device or a special-purpose device, and the embodiments of the present application do not make specific limitations thereon.

[0072] The technical solutions provided by the embodiments of the present application can be applied to wireless charging between communication apparatuses, or to wireless charging and wireless communication between communication apparatuses. The wireless charging between communication apparatuses can include wireless charging between a network device and a terminal device, wireless charging between network devices, and wireless charging between terminal devices.

[0073] In order to facilitate the understanding of the embodiments of the present application, the definitions of the technical terms that can appear in the embodiments of the present application are given below. The terms used in the implementation part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0074] (1) The term "wireless charging" can also be referred to as "charging", "energy transmission" or "charging" and the like. The term "charging" can also be described as "wireless energy transmission", "wireless charging", "wireless energy transmission", "radio frequency energy transmission", "radio frequency energy transmission", "radio frequency charging" or "radio frequency charging".

[0075] The term "wireless communication" can also be referred to as "communication", and the term "communication" can also be described as "data transmission", "information transmission", "transmission", "data transmission" or "data transmission".

[0076] (2) Modulation and demodulation. Among them, modulation is the process of processing the information of the signal source to the carrier, so that it becomes a form suitable for channel transmission. The modulation method can include on-off keying modulation, quadrature amplitude modulation (QAM), pulse amplitude modulation (PAM), phase shift keying (PSK) modulation, amplitude shift keying (ASK) modulation, binary phase shift keying (BPSK) modulation, etc. Demodulation is the inverse process of modulation, which recovers the original data bits or symbols from the signal. Demodulation can sometimes be referred to as detection.

[0077] (3) Time-frequency resource, including time domain resource and frequency domain resource.

[0078] The time domain resource refers to one or more continuous time domain resource units distributed in the time domain. The time domain resource unit can be referred to as a time domain unit, and can include a superframe, a radio frame (referred to as a frame), a subframe, a slot, a sub-slot, a mini-slot, a symbol, and the like, without limitation.

[0079] In the embodiments of the present application, the symbol can be an orthogonal frequency division multiplexing (OFDM) symbol.

[0080] The frequency domain resource refers to one or more continuous resource elements (REs) distributed in the frequency domain. The continuous REs in the frequency domain can be referred to as a resource block (RB). The RE refers to a resource defined by 1 symbol in the time domain and 1 sub-carrier in the frequency domain. The sub-carrier can be understood as the smallest granularity of the frequency domain resource, and one RE can be referred to as one sub-carrier. For example, one RB in the LTE communication system includes 12 sub-carriers, and one RB in the NR communication system also includes 12 sub-carriers. With the evolution of the communication system, the number of sub-carriers included in one RB can be other values. The RB is referred to as a physical resource block (PRB) in the physical layer.

[0081] (4) OFDM and Discrete Fourier Transform-Spreading OFDM (DFT-s-OFDM). Among them, the OFDM technology is to change the high-speed data stream into multiple parallel low-speed data streams through serial / parallel conversion, and then transmit them on different frequency sub-carriers. The OFDM technology uses mutually orthogonal sub-carriers, so the frequency spectrum of the sub-carrier is overlapped. DFT-s-OFDM is a derivative technology based on OFDM. DFT-s-OFDM has single-carrier PAPR characteristics, and is currently used to transmit uplink signals in the LTE communication system and the NR communication system.

[0082] The following takes the signal sending method based on the OFDM technology as an example for illustration, and the signal receiving method is the inverse process, which will not be explained too much. Specifically, the sending end first performs channel coding and modulation on the signal, and then maps the frequency domain to obtain a signal suitable for transmission in the channel. Then, OFDM modulation is performed, and the signal is sent to the channel. The channel coding and modulation method can adopt at least one of the foregoing OOK, QAM, PAM, PSK modulation, ASK modulation, BPSK modulation, and the like, without limitation.

[0083] In the embodiments of the present application, OFDM modulation is performed, that is, a cyclic prefix (CP) is added, and an inverse fast Fourier transform (IFFT) is performed. After OFDM modulation, the signal can also be subjected to a series of processes such as transmission power adjustment before being transmitted to the channel. The antenna of the receiving end processes the received signal in a series of processes, for example, automatic gain control, so that the receiving end can reasonably process the signal.

[0084] Compared with the signal transmission method based on the OFDM technology, the signal transmission method based on the DFT-s-OFDM technology has an additional step of performing DFT on the channel-coded and modulated signal before frequency domain mapping. DFT-s-OFDM is to perform DFT processing on the subcarriers used by each user to convert from time domain to frequency domain. Then, the frequency domain signals of the users are subjected to OFDM modulation, so that the signals of the users are converted to time domain again and transmitted. Through the improvement of DFT, the signal returns to the time domain signal from the frequency domain signal. That is, DFT-s-OFDM is to precode the signal after DFT processing. In the protocol, DFT is referred to as "transform precoding". Precoding is used to process data at the transmitting end. Generally, precoding is performed in units of RB or RGB. It can be understood that precoding before frequency domain mapping after channel coding and modulation can reduce system overhead, improve system capacity, and also reduce bit error rate and interference.

[0085] Current radio frequency energy harvesting schemes mainly consider collecting radio electromagnetic waves existing in the natural environment, but due to the mismatch and collaborative optimization of energy sources, the efficiency of energy harvesting is very low, which cannot meet the daily use needs of IoT devices. There are a large number of base stations in the cellular mobile communication network, and these base stations usually have multiple antennas, can emit arbitrarily designed electromagnetic waves at different frequency bands and / or time periods, and provide directional beams to enhance the radio frequency energy in some directions, which can improve the efficiency of energy transmission to a certain extent. Therefore, wireless energy transfer (WPT) through base stations is one of the important ways to solve the short battery life of IoT devices in the future.

[0086] Existing RF energy harvesting considers passively absorbing electromagnetic wave energy in the environment and converting it into electrical energy to store in a capacitor or rechargeable battery. The specific principle is shown in FIG. 4, which is a schematic diagram of the principle of RF energy harvesting provided by an embodiment of the present application. As shown in FIG. 4, the electromagnetic wave in the air is converted into an alternating current signal through the receiver antenna into the rectifier, the rectifier rectifies and filters the alternating current signal into a direct current signal into the power management module, and finally the direct current signal is delivered to the battery by the power management module, realizing energy storage.

[0087] Research shows that the purpose of improving charging efficiency can be achieved by transmitting a multi-tone (or multi-tone) signal with a multi-tone (or multi-tone) waveform. A multi-tone waveform is usually a superposition of multiple single-tone waveforms of different frequencies. For example, a four-tone waveform is a waveform formed by superimposing four single-tone waveforms of different frequencies, that is, An eight-tone waveform is a waveform formed by superimposing eight single-tone waveforms of different frequencies, that is,

[0088] wherein the single-tone waveform is a continuous sine wave sin(2πft) (or cosine wave cos(2πft)). Because a sine wave carries a frequency (i.e., f is fixed), and the frequency is also commonly referred to as a tone, a sine wave of a given frequency f is also referred to as a single-tone (or single-tone) waveform.

[0089] At the same transmit power, the more tones, the higher the peak value of the generated waveform. Exemplarily, refer to FIG. 5, which is a schematic diagram of the power variation of a single-tone waveform and a multi-tone waveform provided in the prior art. As shown in FIG. 5, the turn-on voltage value (activation threshold) of the rectifier is higher than the peak power of the single-tone waveform and lower than the peak power of some multi-tone waveforms. Therefore, using a multi-tone waveform as a transmitted charging waveform can improve charging efficiency. However, the duration of the peak power of the multi-tone waveform is short, even shorter than the circuit response time of the receiving end (such as the rectifier of the receiving end), resulting in insufficient RF energy harvesting.

[0090] Based on this, the signal processing method provided by the embodiments of the present application can improve the duration of the charging waveform and improve the efficiency of collecting RF energy.

[0091] The signal processing method provided by the embodiments of the present application can be applied to LTE or NR protocol framework, and can be applied to various mobile communication scenarios. For example, scenarios between a base station and a UE, multi-hop / relay transmission between a base station and a user equipment, dual connectivity (DC) or multi-connection between multiple base stations and user equipment, and the like.

[0092] Please refer to FIG. 6, which is a schematic diagram of application scenarios of a signal processing method according to an embodiment of the present application. In FIG. 6, a base station is taken as an access network device, and a UE is taken as a terminal device. As shown in FIG. 6, four application scenarios are shown, which are point-to-point single connection, multi-hop single connection, dual connection, and multi-hop multi-connection.

[0093] It should be understood that the signal processing method provided by the embodiments of the present application can be applied to various application scenarios shown in FIG. 6. It should also be understood that FIG. 6 is exemplary only and does not limit the application scenarios applicable to the present application. Any scenario in which a network side device charges other devices in a cellular network belongs to the application scenarios of the embodiments of the present application.

[0094] Exemplarily, the application scenarios of the embodiments of the present application include but are not limited to: a base station charging a UE, a base station charging a base station, a base station charging a relay node, a relay base station charging a UE, multiple base stations charging a UE, multiple base stations charging multiple UEs, and any scenario in which one or more network side devices charge one or more other devices.

[0095] The method provided by the present application can be applied to the network devices such as the base station shown above, and of course can also be applied to the terminal devices shown above. For ease of description, all embodiments of the present application are described by a sending end and a receiving end; but in actual application, the sending end can be a base station or a terminal, and correspondingly, the receiving end can be a terminal or a base station, such as a small station, which is not limited by the present application. It can be understood that the sending end and the receiving end in the present application are relative, one end of sending a signal is called a sending end in the present application, and one end of receiving a signal is called a receiving end.

[0096] The technical method provided by the present application will be described in detail below.

[0097] Please refer to FIG. 7 first, which is an interaction diagram of an information processing method according to an embodiment of the present application. As shown in FIG. 7, the method includes but is not limited to the following steps:

[0098] S700, the sending end obtains N OFDM symbols.

[0099] S701, the sending end sends the N OFDM symbols through N antennas, each OFDM symbol is carried on the same resource block, the same resource block includes M subcarriers, the M subcarriers include K charging subcarriers, each charging subcarrier carries one charging symbol, and the subsequence corresponding to the K charging symbols is obtained by splitting a charging symbol sequence, the length of the charging symbol sequence is M, and each antenna sends one OFDM symbol.

[0100] Correspondingly, the receiving end receives the N OFDM symbols.

[0101] In the embodiments of the present application, N and M are both positive integers. Optionally, N is 4 or 8. Correspondingly, the charging waveform formed by N OFDM symbols can be a four-tone waveform or an eight-tone waveform.

[0102] In the embodiments of the present application, K is less than or equal to M. That is, the M subcarriers can further include subcarriers other than the charging subcarriers. The other subcarriers can be used to transmit data and / or signaling, or can be used to carry noise. The charging subcarriers are not used to transmit signals and / or signaling, but are used to transmit radio frequency energy, and can be used to transmit radio frequency energy in certain directions, time periods, and frequency bands.

[0103] The N OFDM symbols in the embodiments of the present application are described by taking the obtaining and transmitting of the N OFDM symbols at the i-th time point, i.e., one time point, as an example. It can be understood that the schemes described in the embodiments can be applied to the obtaining and transmitting of OFDM symbols at multiple time points. The formats of the subcarriers occupied by the OFDM symbols at different time points can be the same or different.

[0104] For example, the OFDM symbols occupy 2 subcarriers (such as the 1st subcarrier and the 5th subcarrier) at the i-th time point, occupy 4 subcarriers (such as the 1st subcarrier, the 2nd subcarrier, the 4th subcarrier, and the 5th subcarrier) at the i+1-th time point, and occupy 2 subcarriers (such as the 1st subcarrier and the 5th subcarrier) at the i+2-th time point.

[0105] In addition, the i-th time point in the embodiments of the present application is the time on the time domain corresponding to the OFDM symbol, i.e., the symbol.

[0106] In the embodiments of the present application, the antenna can be a physical antenna, or can be a logical antenna. Each logical antenna can correspond to one or more physical antennas, and be used to transmit the same signal. The antenna can also be referred to as a radio frequency channel or a radio frequency channel.

[0107] The present application does not limit the method for obtaining N OFDM symbols. Optionally, please refer to FIG. 8, which is a flowchart of a signal processing method provided in an embodiment of the present application. As shown in FIG. 8, S700 can include the following steps:

[0108] S801, modulating the bit sequence to obtain M time-domain charging symbols.

[0109] In the embodiments of the present application, the bit sequence can be preset. The bit sequence can be a sequence with all elements being 1 (all-1 sequence), or a sequence with all elements being 0 (all-0 sequence), or a random binary sequence (such as a sequence with half elements being 1 and the other half elements being 0), which is not limited herein.

[0110] Optionally, the modulation comprises amplitude modulation and / or phase modulation. That is, the bit sequence can be amplitude-modulated or phase-modulated alone, or the bit sequence can be modulated in amplitude and phase.

[0111] The description of the modulation can refer to the foregoing and will not be repeated here. The time-domain energized symbol can also be referred to as a time-domain modulation symbol, or simply an energized symbol or a modulation symbol.

[0112] S802, performing fast Fourier transform on the M time-domain energized symbols to obtain an energized symbol sequence, the length of the energized symbol sequence being M.

[0113] That is, the energized symbol sequence can include M frequency-domain energized symbols. The energized symbol sequence is obtained by modulating the bit sequence and then performing FFT. Each time-domain energized symbol can be converted into a frequency-domain energized symbol by FFT. In the embodiments of the present application, the energized symbol sequence can also be referred to as a modulation symbol sequence, or can be referred to as a frequency-domain energized symbol sequence or a frequency-domain modulation symbol sequence or a frequency-domain symbol sequence, or simply a symbol sequence.

[0114] S803, splitting the energized symbol sequence to obtain N sub-sequences.

[0115] The splitting can include the following two schemes.

[0116] Scheme one, splitting the energized symbol sequence according to length to obtain N sub-sequences, each sub-sequence including a number of energized symbols less than M, that is, K < M.

[0117] For example, the energized symbol sequence is uniformly split according to length to obtain N sub-sequences, each sub-sequence including a number of energized symbols equal to M / N, that is, K = M / N.

[0118] Exemplarily, if N = 4, the energized symbol sequence is [a1, a2, …, aM], then uniformly splitting the energized symbol sequence can obtain 4 sub-sequences. The 4 sub-sequences can be M , respectively. Each sub-sequence includes M / 4 energized symbols.

[0119] Scheme two, splitting the energized symbol sequence in value to obtain N sub-sequences, each sub-sequence including a number of energized symbols equal to M, that is, K = M.

[0120] Exemplarily, if N = 4, the energized symbol sequence is [a1, a2, …, aM], then uniformly splitting the energized symbol sequence in value can obtain 4 sub-sequences. The 4 sub-sequences can be M , respectively. Each sub-sequence includes M energized symbols.

[0121] It should be noted that the above two examples are both uniform splitting of the sequence of energized symbols. In fact, a non-uniform splitting method can be used to split the sequence of energized symbols. For example, the 4 sub-sequences can be split in length according to the proportions of 1 / 2, 1 / 4, 1 / 8 and 1 / 8, i.e., the number of energized symbols in the 4 sub-sequences can be M / 2, M / 4, M / 8 and M / 8. For another example, the 4 sub-sequences can be split in value according to the proportions of 1 / 2, 1 / 4, 1 / 8 and 1 / 8, i.e., the 4 sub-sequences can be as follows: [a1 / 2, a2 / 2, …, aM / 2], [a1 / 4, a2 / 4, …, aM / 4], [a1 / 8, a2 / 8, …, aM / 8], [a1 / 8, a2 / 8, …, aM / 8]. M / 2]、[a1 / 4, a2 / 4, …, a M / 4]、[a1 / 8, a2 / 8, …, a M / 8]、[a1 / 8, a2 / 8, …, a M / 8]。

[0122] S804, mapping the energized symbols in each of the N sub-sequences to M sub-carriers, each of the K energized sub-carriers of the M sub-carriers corresponding to a frequency domain OFDM symbol.

[0123] S805, performing IFFT on each frequency domain OFDM symbol to obtain a time domain OFDM symbol.

[0124] In the embodiments of the present application, the OFDM symbol transmitted is a time domain OFDM symbol. According to different splitting methods, the energized sub-carriers and the frequency domain OFDM symbol use different mapping methods.

[0125] Exemplarily, please refer to FIG. 9A or FIG. 9B, which are flow diagrams of mapping a symbol in a sub-carrier to an OFDM symbol according to an embodiment of the present application, and an example of one sub-sequence (sub-sequence 1) and one OFDM symbol (OFDM symbol 1) is given.

[0126] FIG. 9A corresponds to the length splitting scenario, K < M. As shown in FIG. 9A, for the length split sub-sequence 1, the sub-sequence 1 is mapped to M sub-carriers, specifically to K energized sub-carriers in the M sub-carriers. The OFDM symbol 1 includes M sub-carriers, so the number of sub-carriers (M) is greater than the length (K) of the sub-sequence 1, and the M sub-carriers can further include other sub-carriers, or the energy of the modulation symbols configured on the other sub-carriers is 0. In this way, one complete OFDM symbol can be split into N sub-OFDM symbols, and the total number of frequency domain sub-carriers of each sub-OFDM symbol can be M, wherein the number of effective sub-carriers is K, and each radio frequency channel is used to transmit one sub-OFDM symbol.

[0127] FIG. 9B corresponds to a numerically split scenario, K = M. As shown in FIG. 9B, for the numerically split subsequence 1, the subsequence 1 is mapped onto M subcarriers, specifically onto M energized subcarriers. The OFDM symbol 1 includes M subcarriers, and thus the number of subcarriers (M) is equal to the length of the subsequence 1 (M). The M subcarriers can or can not include other subcarriers, or the energy of the modulation symbols configured on the other subcarriers can be 0. In this way, one complete OFDM symbol can be split into N sub-OFDM symbols, and the total number of frequency domain subcarriers of each sub-OFDM symbol can be M, where the number of valid subcarriers is M, and each radio frequency channel is used to transmit one sub-OFDM symbol.

[0128] It should be noted that the method of generating the OFDM symbol shown in FIG. 8 is only an example. In practice, the OFDM symbol can also be generated according to other methods. For example, steps S801 and S802 are replaced by: obtaining M time domain symbols by sampling the pre-defined energizing waveform, and performing FFT on the M time domain symbols to obtain the energized symbol sequence.

[0129] In the embodiments of the present application, the number of sampling points of the sampling can be M. In this way, the energized symbol sequence is obtained by performing FFT on the time domain symbols.

[0130] The present application does not limit the energizing waveform, and the power of the energizing waveform has a certain duration. In some feasible examples, the energizing waveform includes but is not limited to at least one of the following: a rectangular wave, a square wave, a trapezoidal wave, a ladder wave, etc.

[0131] Taking the energizing waveform as a rectangular wave as an example. Optionally, the formula of the rectangular wave can be where p is used to adjust the duty cycle of the rectangular wave. In this way, an energized symbol sequence with a length of M can be generated.

[0132] Optionally, in the method shown in FIG. 8, other steps can also be included. For example, after step S805, each time domain OFDM symbol is up-converted so that each antenna can transmit one OFDM symbol. For another example, other preprocessing steps such as parallel-to-serial conversion, windowing, adding a cyclic prefix, amplifying the signal by a power amplifier, etc.

[0133] In the embodiments of the present application, "obtaining" can include receiving from other entities, or being obtained or generated by the entity. For example, the sending end can be an O-RU, which can receive N OFDM symbols from an O-DU, and generate a charging symbol by the O-RU, or receive the charging symbol from the O-DU, or generate the charging symbol by the O-RU, which is not limited herein. For another example, the sending end can be a DU / O-DU or a device including the DU / O-DU, such as a device including the DU / O-DU and the RU / O-RU, or a device including the CU / O-CU and the DU / O-DU, etc., wherein "sending" can include sending to the RU / O-RU or sending to a terminal device, which is not limited herein.

[0134] For example, the CU can send a preset bit sequence to the DU. The DU generates the time-domain OFDM symbol according to the method shown in FIG. 8, and sends the OFDM symbol to the RU. The RU corresponds the OFDM symbol to the radio frequency channel one by one, and transmits the OFDM symbol at the corresponding frequency point through up-conversion.

[0135] S702, the receiving end obtains a charging signal based on the N OFDM symbols, and a duration of power greater than a power threshold in a charging waveform corresponding to the charging signal is greater than a time threshold.

[0136] The present application does not limit the power threshold and the time threshold. Optionally, the power threshold can include an opening voltage value of a rectifier in the receiving end. In this way, in the case that the charging waveform corresponding to the charging signal is greater than the power threshold, the rectifier can be triggered to work to collect radio frequency energy. The receiving end can convert the electromagnetic wave in the air (the electromagnetic wave corresponding to the N OFDM symbols) into an alternating current signal through a receiver antenna into the rectifier of the receiving end, the rectifier converts the alternating current signal into a direct current signal through rectification filtering and sends the direct current signal to the power management module of the receiving end, and finally the power management module delivers the direct current signal to the battery to realize energy storage.

[0137] It can be understood that in the method shown in FIG. 7, the sending end sends one OFDM symbol to the receiving end through each of the N antennas, so that the receiving end side can synthesize one charging signal based on the N OFDM symbols. And the duration of power greater than a power threshold in a charging waveform corresponding to the charging signal is greater than a time threshold. In this way, the duration of the charging waveform can be improved, and the efficiency of collecting radio frequency energy can be improved.

[0138] For example, please refer to FIG. 10, which is a schematic diagram of power variation of a charging waveform provided by an embodiment of the present application. As shown in FIG. 10, the peak power of the charging waveform can be higher than the opening voltage value of the rectifier, and the duration of the peak power of the charging waveform is longer than the duration of the power of the multi-tone waveform shown in FIG. 5. In this way, the efficiency of collecting radio frequency energy can be improved.

[0139] Please refer to FIG. 11, which is an interactive diagram of another signal processing method provided by the embodiments of the present application. As shown in FIG. 11, the method includes but is not limited to the following steps:

[0140] S1101, the sending end sends N OFDM symbols through N antennas, each OFDM symbol is carried on the same resource block, the same resource block includes M subcarriers, the M subcarriers include K energizing subcarriers, each energizing subcarrier carries an energizing symbol, and a subsequence corresponding to the K energizing symbols is obtained by splitting an energizing symbol sequence, the length of the energizing symbol sequence is M, and each antenna sends an OFDM symbol.

[0141] Correspondingly, the receiving end receives N OFDM symbols.

[0142] S1102, the receiving end obtains an energizing signal based on the N OFDM symbols.

[0143] S1103, the receiving end obtains a rectification efficiency of the energizing signal.

[0144] In the embodiments of the present application, the rectification efficiency can be determined by the energy collected by the rectifier of the receiving end and the target duration. For example, the ratio between the energy and the target duration is taken as the rectification efficiency. The target duration can include the duration of collecting energy, and can also include the circuit response duration of turning on the rectifier. The target duration can also start from the duration of receiving the N OFDM symbols, and the like, which is not limited herein.

[0145] The present application does not limit the execution condition of S1103, which can be executed after obtaining the energizing signal, or can be executed when the duration of the energizing waveform corresponding to the energizing signal is less than or equal to a time threshold, or can be executed when the peak power of the energizing waveform corresponding to the energizing signal is less than or equal to a power threshold, or can be executed when the duty cycle of the energizing waveform is less than a preset value, and the like.

[0146] S1104, the receiving end sends first information to the sending end, the first information includes the rectification efficiency, and / or an adjustment parameter of the energizing waveform determined by the rectification efficiency or an adjustment ratio of the adjustment parameter.

[0147] In the embodiments of the present application, the first information is used to adjust the energizing waveform. In this way, the sending end obtains N OFDM symbols based on the first information. Exemplarily, the N OFDM symbols transmitted in step S1101 are OFDM symbols transmitted at the i th moment, and the obtained N OFDM symbols can be OFDM symbols transmitted at the i+j th moment, and j is a positive integer.

[0148] In some feasible examples, the adjustment parameter can include, but is not limited to, one of the following: duty cycle, power, duration.

[0149] It can be understood that by increasing the duration of the power of the charging waveform, the probability of the receiving end obtaining radio frequency energy can be increased, which is beneficial to improving the charging efficiency. By increasing the power of the charging waveform, the radio frequency energy obtained by the receiving end can be increased, which is beneficial to improving the charging efficiency. By increasing the duty cycle of the charging waveform, the duration of the power of the charging waveform can be increased, which is beneficial to improving the charging efficiency.

[0150] The application does not limit the method of adjusting the parameters of the charging waveform according to the rectification efficiency. The adjustment ratio of the adjustment parameter of the charging waveform can be determined according to the size of the rectification efficiency, so that the sender determines the target value of the adjustment parameter according to the adjustment ratio, to realize the adjustment of the charging waveform. For example, a mapping relationship between the rectification efficiency and the adjustment ratio can be set in advance, as shown in Table 1 below.

[0151] Table 1

[0152] It can be seen from Table 1 that when the rectification efficiency is 15%, the sender can be sent information of an adjustment ratio of 1.5, so that the sender adjusts the parameters of the charging waveform, such as the duty cycle, according to the ratio of 1.5.

[0153] For another example, a mapping relationship between the rectification efficiency and the adjustment parameter can be set in advance, as shown in Table 2 below.

[0154] Table 2

[0155] It can be seen from Table 1 that when the rectification efficiency is 15%, the sender can be sent information of an adjustment ratio of 1.5, so that the sender adjusts the parameters of the charging waveform, such as the duty cycle, according to the ratio of 1.5.

[0156] It should be noted that Table 1 and Table 2 are only examples. In fact, the adjustment parameter and / or the adjustment ratio can be determined by other methods, or the adjustment parameter and the adjustment ratio of the adjustment parameter can be determined in combination with Table 1 and Table 2.

[0157] The application does not limit how the sending end adjusts the charging waveform. The sending end can select a corresponding bit sequence according to an adjustment parameter or an adjustment ratio of the adjustment parameter, and then perform the method shown in FIG. 8. For example, the sending end can be an O-RU. The O-RU can receive the first information from the O-DU, generate the charging symbol by the O-RU, or receive the charging symbol from the O-DU, or generate the charging symbol by the O-RU, which is not limited herein. For another example, the sending end can be a DU / O-DU or a device including the DU / O-DU, such as a device including the DU / O-DU and the RU / O-RU, or a device including the CU / O-CU and the DU / O-DU, etc. The "sending" herein can include sending to the RU / O-RU or sending to a terminal device, which is not limited herein.

[0158] For example, the RU can down-convert the received first information to obtain a baseband signal, and then send the baseband signal to the DU. The DU demodulates the baseband signal to obtain the rectification efficiency and / or the adjustment parameter of the charging signal. The DU or the CU generates the time-domain OFDM symbol according to the rectification efficiency and / or the adjustment parameter according to the method shown in FIG. 8, and sends the OFDM symbol to the RU. The RU corresponds the OFDM symbol to the radio frequency channel one by one, and transmits the OFDM symbol at the corresponding frequency point by up-conversion.

[0159] In the method shown in FIG. 11, the receiving end obtains the rectification efficiency of the charging signal, and sends the first information to the sending end, so that the sending end adjusts the charging signal based on the rectification efficiency or the adjustment parameter determined according to the rectification efficiency, thereby adjusting the duration and / or power of the power of the charging waveform corresponding to the charging signal, and improving the charging efficiency.

[0160] The above describes the method of the embodiment of the application in detail. The device of the embodiment of the application is provided below.

[0161] Please refer to FIG. 12, which is a structural schematic diagram of a communication device provided by the embodiment of the application. The communication device can include a transceiver unit 1201 and a processing unit 1202. The transceiver unit 1201 can be a device with input (reception) or output (sending) of signals, for signal transmission with other devices or other components in the device. The processing unit 1202 can be a device with processing function, which can include one or more processors, for executing instructions (or codes or programs), such as processing of communication protocols and communication data.

[0162] The communication device can be a receiving end, or a device (for example, a chip, or a chip system, or a circuit, etc.) in the receiving end, or a device capable of being used in matching with the receiving end. The communication device can also be a sending end, or a device (for example, a chip, or a chip system, or a circuit, etc.) in the sending end, or a device capable of being used in matching with the sending end.

[0163] In the embodiments of the present application, the receiving end can be a terminal device, or a device (for example, a chip, or a chip system, or a circuit, etc.) in the terminal device, or a device capable of being used in matching with the terminal device. The sending end can be a network device, or a device (for example, a chip, or a chip system, or a circuit, etc.) in the network device, or a device capable of being used in matching with the network device. In the following, the terminal device and the network device are taken as examples. Alternatively, in the embodiments of the present application, the receiving end and the sending end can be network devices; or the receiving end and the sending end can be terminal devices.

[0164] When the communication device is a receiving end, wherein:

[0165] The transceiver 1201 is configured to receive N orthogonal frequency division multiplexing (OFDM) symbols, each of the N OFDM symbols being carried on a same resource block, the same resource block including M subcarriers, the M subcarriers including K energizing subcarriers, each of the K energizing subcarriers carrying an energizing symbol, and a subsequence corresponding to the K energizing symbols being obtained by splitting an energizing symbol sequence, the energizing symbol sequence having a length of M, N and M being positive integers, and K being less than or equal to M.

[0166] The processing unit 1202 is configured to obtain an energizing signal based on the N OFDM symbols, the energizing signal corresponding to an energizing waveform in which a duration of a power greater than a power threshold is greater than a time threshold.

[0167] In some possible examples, the energizing symbol sequence is obtained by modulating a bit sequence and then performing fast Fourier transform (FFT) on the modulated bit sequence, and the modulating includes amplitude modulation and / or phase modulation.

[0168] In some other possible examples, the energizing symbol sequence is obtained by performing FFT on a time domain symbol, and the time domain symbol is obtained by sampling a predefined energizing waveform, and a number of sampling points of the sampling is M.

[0169] In some possible examples, the energizing waveform includes at least one of a rectangular wave, a square wave, a trapezoidal wave, and a ladder wave.

[0170] In some possible examples, when the subsequence is obtained by splitting the energizing symbol sequence according to a length, K < M.

[0171] In some possible examples, K is equal to M when the subsequence is obtained by splitting the charging symbol sequence according to a numerical value.

[0172] In some possible examples, the processing unit 1202 is further configured to obtain a rectification efficiency of the charging signal.

[0173] The transceiver unit 1201 is further configured to send first information, where the first information is used to adjust the charging waveform, and the first information includes the rectification efficiency, and / or an adjustment parameter of the charging waveform determined by the rectification efficiency or an adjustment ratio of the adjustment parameter.

[0174] In some possible examples, the adjustment parameter includes at least one of a duty cycle, a power, and a duration.

[0175] When the communication device is a sending end, the processing unit 1202 is configured to:

[0176] The processing unit 1202 is configured to obtain N orthogonal frequency division multiplexing (OFDM) symbols, and each of the OFDM symbols is carried on a same resource block, the same resource block includes M subcarriers, the M subcarriers include K charging subcarriers, and K sub-sequences corresponding to the K charging subcarriers are obtained by splitting a charging symbol sequence, a length of the charging symbol sequence is M, N and M are positive integers, and K is less than or equal to M.

[0177] The transceiver unit 1201 is configured to send the N OFDM symbols through N antennas, and the N OFDM symbols are used to obtain a charging signal, a duration of a power greater than a power threshold in a charging waveform corresponding to the charging signal is greater than a time threshold, and each of the antennas sends one of the OFDM symbols.

[0178] In some possible examples, the charging symbol sequence is obtained by modulating a bit sequence and then performing fast Fourier transform (FFT), and the modulation includes amplitude modulation and / or phase modulation.

[0179] In some possible examples, the charging symbol sequence is obtained by performing FFT on a time domain symbol, and the time domain symbol is obtained by sampling a predefined charging waveform, and a number of sampling points of the sampling is M.

[0180] In some possible examples, the charging waveform includes at least one of a rectangular wave, a square wave, a trapezoidal wave, and a ladder wave.

[0181] In some possible examples, K is less than M when the subsequence is obtained by splitting the charging symbol sequence according to a length.

[0182] In some possible examples, K is equal to M when the subsequence is obtained by splitting the charging symbol sequence according to a numerical value.

[0183] In some possible examples, the transceiving unit 1201 is further configured to receive first information, the first information being used to adjust the charging waveform, the first information comprising the rectification efficiency, and / or an adjustment parameter of the charging waveform determined by the rectification efficiency or an adjustment ratio of the adjustment parameter.

[0184] The processing unit 1202 is further configured to obtain N OFDM symbols based on the first information.

[0185] In some possible examples, the adjustment parameter comprises at least one of the following: a duty cycle, a power, a duration.

[0186] The implementation of the transceiving unit 1201 and the processing unit 1202 described above can refer to the related description of the method embodiments shown in FIG. 7 or FIG. 11, which will not be repeated here.

[0187] Referring to FIG. 13, FIG. 13 is a structural schematic diagram of another communication apparatus provided by an embodiment of the present application. As shown in FIG. 13, the communication apparatus can include a processor 111 and a storage medium 112. The processor 111 can also be referred to as a processing unit, and can implement certain control functions. The storage medium 112 can also be referred to as a storage unit, or a memory. The storage medium 112 has instructions 114 stored thereon. The instructions 114 can be run on the processor 111, so that the communication apparatus performs any of the methods described in FIG. 4 or FIG. 5 of the embodiments of the present application.

[0188] Optionally, the processor 111 can include instructions 113, which can be run on the processor 111, so that the communication apparatus performs any of the methods described in FIG. 7 or FIG. 11 of the embodiments of the present application.

[0189] The communication apparatus can be a terminal device or a network device, used to implement the methods described in the method embodiments. However, the scope of the apparatus described in the present application is not limited to this. The communication apparatus can be a stand-alone device or can be part of a larger device. For example, the communication apparatus can be:

[0190] (1) a stand-alone integrated circuit (IC), or a chip, or a chip system or subsystem;

[0191] (2) a set of one or more ICs, which can optionally include a storage component for storing data and / or instructions;

[0192] (3) an ASIC, such as a modem;

[0193] (4) a module that can be embedded in other devices.

[0194] Please refer to FIG. 14, which is a structural schematic diagram of a terminal device provided in an embodiment of the present application. For ease of illustration, FIG. 14 only shows main components of the terminal device. As shown in FIG. 14, the terminal device includes a processor, a memory, a control circuit, an antenna, and an input / output device. The processor is mainly used for processing communication protocols and communication data, controlling the entire terminal device, executing software programs, and processing data of the software programs. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by a user and outputting data to the user.

[0195] When the terminal device is powered on, the processor can read the software program in the storage unit, parse and execute instructions of the software program, and process data of the software program. When data needs to be transmitted wirelessly, the processor performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit processes the baseband signal to obtain a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna. The radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor. The processor converts the baseband signal into data and processes the data.

[0196] For ease of illustration, FIG. 14 only shows one memory and one processor. In an actual terminal device, multiple processors and memories can exist. The memory can also be referred to as a storage medium or a storage device, etc., and the embodiments of the present application do not limit this.

[0197] In one embodiment, the antenna is configured to perform the operations performed by the transceiver 1201 in the above embodiments. The processor is configured to perform the operations performed by the processing unit 1202 in the above embodiments.

[0198] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program. The program is executed by a processor to implement the related processes in the signal processing method provided by the above method embodiments.

[0199] The embodiments of the present application also provide a computer program product for storing a computer program. When the computer program is run on a computer (or a processor), the computer is caused to execute one or more steps in any of the above signal processing methods. The constituent modules of the above-mentioned devices, if realized in the form of software function units and sold or used as independent products, can be stored in a computer readable storage medium.

[0200] The embodiment of the present application provides a chip, comprising a processor, which is used for calling and running instructions stored in a memory, so that a communication device installed with the chip executes any of the above methods.

[0201] The embodiment of the present application also provides another chip, comprising an input interface, an output interface and a processing circuit, the input interface, the output interface and the processing circuit are connected through internal connection paths, and the processing circuit is used for executing any of the above methods. Optionally, the chip further comprises a memory. The input interface, the output interface, the processor and the memory are connected through internal connection paths, and the processor is used for executing codes in the memory, and when the codes are executed, the processor is used for executing any of the above methods.

[0202] The embodiment of the present application also provides a chip system, comprising at least one processor and a communication interface, the communication interface and the at least one processor are connected through a line, and the at least one processor is used for running computer programs or instructions to execute any of the above methods. The chip system can be composed of a chip, or can comprise a chip and other discrete devices.

[0203] The embodiment of the present application also provides a communication system, which comprises an apparatus for executing the method shown in FIG. 7 or FIG. 11.

[0204] It should be understood that the memory mentioned in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can comprise both volatile and non-volatile memories. Among them, the non-volatile memory can be a hard disk (HDD), a solid-state drive (SSD), a ROM, a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a RAM, which is used as an external cache. The memory is any other medium capable of carrying or storing desired program codes in the form of instructions or data structures and capable of being accessed by a computer, but is not limited to this. The memory in the embodiment of the present application can also be a circuit or other any device capable of realizing a storage function, used for storing program instructions and / or data.

[0205] It should also be understood that the processor mentioned in the embodiments of the present application can be a CPU, and can also be other general-purpose processors, digital signal processors (DSP), ASIC, FPGA, GPU or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor or can be any conventional processor.

[0206] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, GPU or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated in the processor.

[0207] It should be noted that the memory described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0208] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in connection with the embodiments provided herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0209] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0210] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0211] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or can be physically present as each unit, or two or more units can be integrated in one unit.

[0212] The steps in the method of the embodiments of the present application can be adjusted in sequence, combined and deleted according to actual needs. The steps of each embodiment can be partially executed (for example, the terminal device can not execute the steps executed by the terminal device in the above embodiments). The execution sequence of different steps can be changed. The embodiments described herein can be combined with other embodiments, different embodiments can be combined with each other, and different steps of different embodiments in the present application can be combined.

[0213] The modules / units in the device of the embodiments of the present application can be combined, divided and deleted according to actual needs.

[0214] In this document, referring to "embodiments" means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiment, is not mutually exclusive of other embodiments, nor is it necessarily independent of other embodiments.

[0215] In the present application, it can refer to a communication protocol or specification, such as a 3GPP communication protocol.

[0216] In the embodiments of the present application, at least one can also be described as one or more, and the number can be two, three, four or more, which is not limited in the present application.

[0217] In the embodiments of the present application, the terms "first", "second", "third", "fourth", etc., "A", "B", "C" and "D" (if any) are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0218] In the embodiments of the present application, "comprising" can be a containing relationship or an equal relationship. For example, A includes B, which can be that A contains B and other contents, or A and B are the same content.

[0219] In the description of the present application, unless otherwise specified, " / " means that the objects before and after the " / " are in an "or" relationship, for example, A / B can mean A or B; "and / or" in the present application is only a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. And, in the description of the present application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or the like means any combination of the items, including any combination of single item or multiple items. For example, at least one of a, b, or c can mean a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0220] In the description of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design scheme described as "exemplary", "for example" or "for instance" in the present application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Rather, the use of "exemplary", "for example" or "for instance" is intended to present the relevant concept in a specific manner.

[0221] It can be understood that in the description of the present application, "when", "if" and "when" all refer to the corresponding processing of the device under certain objective circumstances, and are not limited to time, and do not require the device to have a judgment action when implemented, nor does it mean that there are other limitations.

[0222] In the present application, "at the same time" can be understood as at the same time point, also can be understood as in a period of time, also can be understood as in the same cycle, which can be understood in combination with the context.

[0223] It can be understood that in each embodiment of the present application, "A corresponds to B" means that B is associated with A, or B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, but B can also be determined according to A and / or other information.

[0224] In addition, the terms "system" and "network" are often used interchangeably in this document.

[0225] It should be understood that in various embodiments of the present application, the size of the sequence number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

A signal processing method characterized by comprising: The method comprises: receiving N orthogonal frequency division multiplexing (OFDM) symbols, each of the OFDM symbols being carried on the same resource block, the same resource block comprising M subcarriers, the M subcarriers comprising K energizing subcarriers, each of the energizing subcarriers carrying an energizing symbol, and a subsequence corresponding to the K energizing symbols being obtained by splitting an energizing symbol sequence, the energizing symbol sequence having a length of M, N and M being positive integers, and K being less than or equal to M; obtaining an energizing signal based on the N OFDM symbols, the energizing signal corresponding to an energizing waveform, and a duration of a power greater than a power threshold in the energizing waveform being greater than a time threshold. The method of claim 1, wherein The energizing symbol sequence is obtained by modulating a bit sequence and then performing fast Fourier transform (FFT), and the modulation comprises amplitude modulation and / or phase modulation. The method of claim 1, wherein The energizing symbol sequence is obtained by performing FFT on a time domain symbol, and the time domain symbol is obtained by sampling a predefined energizing waveform, and the sampling has a sampling point number of M. The method according to claim 3, characterized in that The energizing waveform comprises at least one of the following: a rectangular wave. The method according to any one of claims 1 to 4, characterized in that When the subsequence is obtained by splitting the energizing symbol sequence according to length, K < M. The method according to any one of claims 1 to 4, characterized in that When the subsequence is obtained by splitting the energizing symbol sequence according to value, K = M. The method according to any one of claims 1 to 6, characterized in that The method further comprises: obtaining a rectification efficiency of the energizing signal; sending first information, the first information being used for adjusting the energizing waveform, the first information comprising the rectification efficiency, and / or an adjustment parameter of the energizing waveform determined by the rectification efficiency or an adjustment ratio of the adjustment parameter. The method of claim 7, wherein The adjustment parameter comprises at least one of the following: a duty cycle, a power, and a duration. A signal processing method characterized by comprising: The method comprises: obtaining N orthogonal frequency division multiplexing (OFDM) symbols, each of the OFDM symbols being carried on the same resource block, the same resource block comprising M subcarriers, the M subcarriers comprising K energizing subcarriers, each of the energizing subcarriers carrying an energizing symbol, and a subsequence corresponding to the K energizing symbols being obtained by splitting an energizing symbol sequence, the energizing symbol sequence having a length of M, N and M being positive integers, and K being less than or equal to M; sending the N OFDM symbols through N antennas, the N OFDM symbols being used for obtaining an energizing signal, the energizing signal corresponding to an energizing waveform, and a duration of a power greater than a power threshold in the energizing waveform being greater than a time threshold, and each of the radio frequency channels sending one of the OFDM symbols. The method of claim 9, wherein The energizing symbol sequence is obtained by modulating a bit sequence and then performing fast Fourier transform (FFT), and the modulation comprises amplitude modulation and / or phase modulation. The method of claim 9, wherein The energizing symbol sequence is obtained by performing FFT on a time domain symbol, and the time domain symbol is obtained by sampling a predefined energizing waveform, and the sampling has a sampling point number of M. The method according to any one of claims 9 to 11, characterized in that The energizing waveform comprises at least one of the following: a rectangular wave, a square wave, a trapezoidal wave, and a ladder wave. The method according to any one of claims 9 to 12, characterized in that When the subsequence is obtained by splitting the energizing symbol sequence according to length, K < M. The method according to any one of claims 9 to 12, characterized in that When the subsequence is obtained by splitting the energizing symbol sequence according to value, K = M. The method according to any one of claims 9 to 14, characterized in that The method further comprises: receive first information, the first information being used for adjusting the charging waveform, the first information comprising the rectification efficiency, and / or an adjustment parameter of the charging waveform determined by the rectification efficiency or an adjustment ratio of the adjustment parameter; obtain N OFDM symbols based on the first information. The method of claim 15, wherein The adjustment parameter comprises at least one of the following: duty cycle, power, duration. A communication device characterized by comprising: comprise: comprise units for performing the method according to any one of claims 1 to 16. A communication device characterized by comprising: The communication device comprises a processor and a storage medium, the storage medium stores instructions, and the instructions are run by the processor to cause the method according to any one of claims 1 to 16 to be performed. A computer-readable storage medium, characterized by The computer readable storage medium comprises instructions, when the instructions are run by the processor, causing the method according to any one of claims 1 to 16 to be performed. A computer program product, characterized in that The computer program product comprises instructions, when the instructions are run by the processor, causing the method according to any one of claims 1 to 16 to be performed. A chip characterized by comprise a processor for calling and running instructions stored in a memory, so that the communication device installed with the chip executes the method according to any one of claims 1 to 16. A communication system characterized by comprise: means for performing the method according to any one of claims 1 to 11, and means for performing the method according to any one of claims 12 to 17.

Images