WO2024104264A1 - 一种信号发送方法及装置 - Google Patents

一种信号发送方法及装置 Download PDF

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Publication number
WO2024104264A1
WO2024104264A1 PCT/CN2023/130954 CN2023130954W WO2024104264A1 WO 2024104264 A1 WO2024104264 A1 WO 2024104264A1 CN 2023130954 W CN2023130954 W CN 2023130954W WO 2024104264 A1 WO2024104264 A1 WO 2024104264A1
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Prior art keywords
frequency domain
signal
communication device
type
time unit
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PCT/CN2023/130954
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English (en)
French (fr)
Inventor
段瑞洋
李雪茹
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华为技术有限公司
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Publication of WO2024104264A1 publication Critical patent/WO2024104264A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a signal sending method and device.
  • a frequency hopping method can be used to send the sensing signal.
  • the sensing device can send sensing signals with different center frequencies but continuous spectrum in multiple consecutive symbols.
  • this frequency hopping method will introduce random phase errors between adjacent subcarriers, thereby affecting the ranging accuracy.
  • the sensing device can keep a portion of subcarriers overlapping during each frequency hopping. In the subsequent joint processing, the random phase error is estimated and compensated through the overlapping subcarriers.
  • the equivalent bandwidth occupied by the overlapping subcarriers is too large, resulting in a smaller actual increase in bandwidth each time the frequency hops, which leads to an increase in the number of frequency hopping and an increase in the perceived delay.
  • the present application provides a signal sending method and device, which can reduce the bandwidth occupied by the frequency hopping overlap area and increase the actual increased bandwidth of the frequency hopping, thereby reducing the number of frequency hopping times and delay.
  • a signal transmission method which can be executed by a first communication device, or by a component of the first communication device, such as a processor, a chip, or a chip system of the first communication device, or by a logic module or software that can implement all or part of the functions of the first communication device.
  • the method includes:
  • the first signal is mapped to the frequency domain subbands of each of the N time units, and the frequency domain subband of each time unit includes a first type of frequency domain region and at least one second type of frequency domain region. At least one second type of frequency domain region in the frequency domain subband of the i-th time unit in the N time units and at least one second type of frequency domain region in the frequency domain subband of the i+1-th time unit overlap, N is a positive integer greater than 1, and i is a positive integer from 1 to N-1.
  • the first signal is mapped in the first type of frequency domain region with a first comb tooth and mapped in the second type of frequency domain region with a second comb tooth, and the second comb tooth is smaller than the first comb tooth.
  • the first communication device sends signals on the frequency domain subbands of multiple time units, so that the receiving end can equate the signals mapped on the frequency domain subbands of multiple time units to received signals with larger bandwidths.
  • the requirements for the ADC sampling rate of the transmitting end can be reduced, and the signal transmission capabilities of devices such as RedCap UE can also be adapted.
  • larger comb teeth are used for mapping in the first type of frequency domain area in the frequency domain subbands of each time unit, and smaller comb teeth are used for mapping in the overlapping area (i.e., the second type of frequency domain area).
  • the bandwidth occupied by the overlapping area can be reduced, and the actual increased bandwidth of frequency hopping can be increased, thereby reducing the number of frequency hopping times and service (such as perception or positioning) delays.
  • a signal processing method which can be executed by a second communication device, or by a component of the second communication device, such as a processor, chip, or chip system of the second communication device, or by a logic module or software that can implement all or part of the functions of the second communication device.
  • the method includes:
  • the third signal is a signal obtained by reflecting the first signal from the target.
  • the first signal is mapped to the frequency domain subbands of the N time units, and the frequency domain subband of each time unit includes a first-type frequency domain region and at least one second-type frequency domain region. At least one second-type frequency domain region in the frequency domain subband of the i-th time unit and at least one second-type frequency domain region in the frequency domain subband of the i+1-th time unit overlap, where N is a positive integer greater than 1, and i is a positive integer from 1 to N-1. Furthermore, the first signal is mapped with a first comb tooth in the first-type frequency domain region and with a second comb tooth in the second-type frequency domain region, and the second comb tooth is smaller than the first comb tooth;
  • the first signal is mapped on the frequency domain sub-bands of multiple time units, so that the second communication device can equate the signals mapped on the frequency domain sub-bands of multiple time units to a received signal with a larger bandwidth, compared with mapping the signals with a larger bandwidth on the frequency domain sub-band of one time unit.
  • Signals can reduce the requirements for the ADC sampling rate of the transmitter and can also adapt to the signal transmission capabilities of devices such as RedCap UE.
  • a larger comb tooth is used for mapping in the first frequency domain area in the frequency domain sub-band of each time unit, and a smaller comb tooth is used for mapping in the overlapping area (i.e., the second frequency domain area).
  • it can reduce the bandwidth occupied by the overlapping area and increase the actual bandwidth increased by frequency hopping, thereby reducing the number of frequency hopping times and service (such as perception or positioning) delay.
  • the frequency domain subband of each time unit includes multiple frequency domain units; the frequency domain subbands of N time units satisfy at least one of the following relationships: belonging to the same carrier; belonging to the same bandwidth part BWP of the same carrier; belonging to the same resource pool of the same carrier; belonging to adjacent BWPs of the same carrier; belonging to adjacent resource pools of the same carrier; or belonging to different carriers of intra-band carrier aggregation.
  • a signal in the first signal mapped to a frequency domain subband of the i-th time unit is generated according to a sequence of length M.
  • M1 elements are mapped in a first type of frequency domain region, and the remaining M-M1 elements are mapped in a second type of frequency domain region.
  • the M-M1 elements are obtained according to a base sequence and an orthogonal mask modulation of length L, where L is a positive integer.
  • the first communication device uses OCC code modulation to map the elements in the second type of frequency domain area.
  • OCC code modulation uses OCC code modulation to map the elements in the second type of frequency domain area.
  • the number of frequency domain units included in the second type of frequency domain region is a positive integer multiple of L, and/or M-M1 is a positive integer multiple of L.
  • L is a positive integer greater than or equal to the first comb tooth.
  • the value of N and/or the number of frequency domain units included in the second type of frequency domain area is a preset value.
  • the number of frequency domain units included in the second type of frequency domain region is determined by a signal-to-noise ratio SNR required for random phase error estimation.
  • the number of frequency domain units included in the second frequency domain area can be flexibly adjusted according to actual needs, which is more flexible than the second frequency domain area including a fixed number of frequency domain units.
  • the second frequency domain area can include fewer frequency domain units, which can further reduce the bandwidth occupied by the second frequency domain area and increase the actual increased bandwidth of frequency hopping, thereby reducing the number of frequency hopping and perception (or positioning) delay.
  • the time unit is a symbol, or the time unit is a time slot.
  • the first communication device is a terminal device or an access network device.
  • a communication device for implementing the various methods described above.
  • the communication device may be the first communication device in the first aspect described above, or a device included in the first communication device, such as a chip or a chip system; or, the communication device may be the second communication device in the second aspect described above, or a device included in the second communication device, such as a chip or a chip system.
  • the communication device includes a module, unit, or means corresponding to the method described above, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware.
  • the hardware or software includes one or more modules or units corresponding to the above functions.
  • the communication device may include a processing module and a transceiver module.
  • the transceiver module which may also be referred to as a transceiver unit, is used to implement the sending and/or receiving functions in any of the above aspects and any possible implementations thereof.
  • the transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.
  • the processing module may be used to implement the processing functions in any of the above aspects and any possible implementations thereof.
  • the transceiver module includes a sending module and a receiving module, which are respectively used to implement the sending and receiving functions in any of the above aspects and any possible implementation methods thereof.
  • a communication device comprising: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method described in any one of the above aspects.
  • the communication device can be the first communication device in the above first aspect, or a device included in the first communication device, such as a chip or a chip system; or the communication device can be the second communication device in the above second aspect, or a device included in the second communication device, such as a chip or a chip system.
  • a communication device comprising: a processor and a communication interface; the communication interface is used to communicate with a module outside the communication device; the processor is used to execute a computer program or instruction so that the communication device executes the method described in any one of the above aspects.
  • the communication device may be the first communication device described in the first aspect, or a device included in the first communication device, such as a chip or a chip system; or the communication device may be the second communication device described in the second aspect, or a device included in the second communication device, such as a chip or a chip system. Film system.
  • a communication device comprising: an interface circuit and a processor, the interface circuit being a code/data read/write interface circuit, the interface circuit being used to receive computer execution instructions (computer execution instructions are stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor; the processor being used to execute the computer execution instructions so that the communication device executes the method described in any of the above aspects.
  • the communication device may be the first communication device in the above first aspect, or a device included in the first communication device, such as a chip or a chip system; or the communication device may be the second communication device in the above second aspect, or a device included in the second communication device, such as a chip or a chip system.
  • a communication device comprising: at least one processor; the processor is used to execute a computer program or instruction so that the communication device performs the method described in any one of the above aspects.
  • the communication device may be the first communication device in the above first aspect, or a device included in the first communication device, such as a chip or a chip system; or the communication device may be the second communication device in the above second aspect, or a device included in the second communication device, such as a chip or a chip system.
  • the communication device includes a memory, which is used to store necessary program instructions and data.
  • the memory can be coupled to the processor, or can be independent of the processor.
  • the communication device may be a chip or a chip system.
  • the device When the device is a chip system, it may be composed of a chip or may include a chip and other discrete devices.
  • a computer-readable storage medium wherein instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is executed on a communication device, the communication device can execute the method described in any one of the above aspects.
  • a computer program product comprising instructions, which, when executed on a communication device, enables the communication device to execute the method described in any one of the above aspects.
  • the above-mentioned sending action/function can be understood as output information
  • the above-mentioned receiving action/function can be understood as input information
  • the technical effects brought about by any design method in the third to ninth aspects can refer to the technical effects brought about by different design methods in the above-mentioned first or second aspects, and will not be repeated here.
  • FIG1 is a schematic diagram of a frequency hopping method provided by the present application.
  • FIG2 is a schematic diagram of another frequency hopping method provided by the present application.
  • FIG3 is a schematic diagram of a random phase error introduced by a frequency hopping method provided by the present application.
  • FIG4 is a schematic diagram of bandwidth occupancy when frequency hopping is performed using different comb teeth provided by the present application.
  • FIG5 is a schematic diagram of the structure of a communication system provided by the present application.
  • FIG6 is a schematic diagram of the structure of another communication system provided by the present application.
  • FIG7a is a schematic diagram of the structure of a communication device provided by the present application.
  • FIG7b is a schematic diagram of the structure of another communication device provided by the present application.
  • FIG7c is a schematic diagram of the structure of another communication device provided by the present application.
  • FIG8 is a schematic diagram of a flow chart of a signal sending method provided by the present application.
  • FIG9 is a schematic diagram of a first type of frequency domain region and a second type of frequency domain region provided by the present application.
  • FIG10 is a schematic diagram of a frequency hopping method provided by the present application when different comb tooth mappings are used in the first frequency domain region and the second frequency domain region;
  • FIG11 is a schematic diagram of a positional relationship between frequency domain sub-bands of a plurality of time units provided by the present application.
  • FIG12 is a schematic diagram of performing comb-division multiplexing on a frequency domain sub-band of a time unit provided by the present application;
  • FIG13 is a schematic diagram of an OCC code modulation provided by the present application.
  • FIG14 is a schematic diagram of the structure of another communication device provided in the present application.
  • plural means two or more than two.
  • “At least one of the following” or its similar expression refers to any combination of these items, including any combination of single items or plural items.
  • at least one item of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.
  • words such as “first” and “second” are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and execution order, and words such as “first” and “second” do not necessarily limit them to be different.
  • words such as “exemplary” or “for example” are used to indicate examples, illustrations or descriptions. Any embodiment or design described as “exemplary” or “for example” in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as “exemplary” or “for example” is intended to present related concepts in a concrete way for easy understanding.
  • wireless sensing technology is widely used in sensing, radar, or communication sensing integration systems.
  • the principle of wireless sensing can be simply described as follows: the transmitter sends a sensing signal to a specific space, the sensing signal is reflected by the target to form an echo signal, the receiver receives the echo signal, compares and analyzes the echo signal and the sensing signal to obtain information such as the distance, speed, and direction of the target.
  • ⁇ R the ranging resolution
  • c the speed of light
  • B the bandwidth of the perceived signal.
  • the bandwidth of the perceived signal needs to be greater than or equal to 500 megahertz (MHz), which places high demands on the sampling rate of the analog to digital converter (ADC) at the transmitter. That is, in order not to lose ranging accuracy, the ADC sampling rate at the transmitter must be at least 500MHz.
  • the transmitter device is a reduced capacity (RedCap) user equipment (UE)
  • RedCap reduced capacity
  • frequency hopping can be used to send perception signals.
  • the transmitter when frequency hopping is adopted, the transmitter can send perception signals with different center frequencies but continuous spectrum in multiple symbols.
  • the multiple symbols can be continuous or discontinuous.
  • FIG1 takes the example of the transmitter sending the perception signal in 4 consecutive symbols as an example.
  • the transmitting end sends a perception signal with different center frequencies but continuous spectrum on two symbols, which can be understood as one frequency hopping.
  • the transmitting end sends a perception signal with different center frequencies but continuous spectrum on symbol 1 and symbol 2, which can be understood as one frequency hopping, and sends a perception signal with different center frequencies but continuous spectrum on symbol 2 and symbol 3, which can be understood as one frequency hopping.
  • the transmitting end sends a perception signal with different center frequencies but continuous spectrum on N symbols
  • the process can include N-1 frequency hoppings.
  • the sensing signals sent on the multiple symbols can be jointly processed at the receiving end into an equivalent sensing signal with a larger bandwidth, thereby achieving high-precision ranging.
  • phase locked loop PLL
  • LNA low noise amplifier
  • PA power amplifier
  • the adjacent subcarriers on symbol 1 and symbol 2 For example, as shown in FIG3, the adjacent subcarriers on symbol 1 and symbol 2, the adjacent subcarriers on symbol 2 and symbol 3, and the adjacent subcarriers on symbol 3. There are random phase errors between adjacent subcarriers on symbol 3 and symbol 4.
  • the transmitter will keep a portion of subcarriers overlapping (called the frequency hopping overlap region) each time the frequency hops. For example, as shown in FIG2 , there are partially overlapping subcarriers on symbol 1 and symbol 2. Similarly, there are partially overlapping subcarriers on symbol 2 and symbol 3, and symbol 3 and symbol 4. Subsequently, during joint processing, the receiver can use the partially overlapping subcarriers to estimate the random phase error and compensate for it, so as to reduce the impact of the random phase error on the ranging accuracy.
  • the equivalent bandwidth occupied by the overlapping part of the frequency hopping is too large, resulting in a smaller actual increase in bandwidth (also called effective bandwidth) during each frequency hopping, which in turn increases the number of frequency hopping times and increases the perceived delay.
  • multi-comb mapping can be understood as non-continuous mapping.
  • the subcarriers it can select are subcarriers numbered 0, 4, 8, 12, 16... or 1, 5, 9, 13, 17... or 2, 6, 10, 14, 18... or 3, 7, 11, 15, 19...
  • the use of multi-comb mapping can make shorter perception sequences occupy a larger bandwidth; in addition, multiple transmitters can also use different subcarriers to achieve multiplexing of the same bandwidth.
  • continuous mapping can also be understood as 1-comb mapping, or, 1-comb mapping can also be understood as continuous mapping.
  • the frequency hopping overlap region is usually required to include a certain number of subcarriers.
  • the frequency hopping overlap region is required to include at least 4 subcarriers, and the bandwidth of the perceived signal during one frequency hopping process is 12 subcarriers
  • the actual increased bandwidth after one frequency hopping is the width of 8 subcarriers.
  • the frequency hopping overlap region actually occupies 8 subcarriers, and the actual increased bandwidth after one frequency hopping is the width of 4 subcarriers. Therefore, compared with 1 comb-tooth mapping, the actual increased bandwidth for each frequency hopping is reduced by half, which in turn leads to an increase in the number of frequency hopping times and an increase in perceived delay.
  • the present application provides a signal sending method, which can use a smaller comb tooth number mapping in the frequency hopping overlapping area and a larger comb tooth number mapping in the non-overlapping area, so as to reduce the bandwidth occupied by the frequency hopping overlapping area and increase the actual increased bandwidth of the frequency hopping, thereby reducing the number of frequency hopping times and perceived delay.
  • the communication system can be a third generation partnership project (3GPP) communication system, for example, a fifth generation (5G) or sixth generation (6G) mobile communication system, a sidelink (SL) system, an ultra-wideband (UWB) system, a vehicle to everything (V2X) system, or a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT), and other next generation communication systems.
  • 3GPP third generation partnership project
  • 5G fifth generation
  • 6G sixth generation
  • SL sidelink
  • UWB ultra-wideband
  • V2X vehicle to everything
  • D2D device-to-device
  • M2M machine-to-machine
  • IoT Internet of Things
  • the communication system can also be a non-3GPP communication system, such as a wireless local area network (WLAN) system such as Wi-Fi, without limitation.
  • WLAN wireless local area network
  • the technical solutions of the embodiments of the present application can be applied to various communication scenarios, for example, can be applied to one or more of the following communication scenarios: smart home, D2D, V2X, and IoT communication scenarios.
  • the communication system includes a first communication device and a second communication device.
  • the first communication device is a signal transmitter
  • the second communication device is a signal receiver
  • the first communication device and the second communication device may be the same communication device, in which case it can be understood as a self-transmitting and self-receiving perception scenario.
  • the first communication device and the second communication device may be different communication devices, in which case it can be understood as a self-transmitting and other-receiving perception scenario.
  • the first communication device may be a terminal device; or, as shown in (b) of FIG6 , the first communication device may be an access network device.
  • the first communication device may be a terminal device, and the second communication device may be an access network device; or, as shown in (d) of FIG6 , the first communication device may be a first terminal device, and the second communication device may be a second terminal device.
  • the present application does not limit the first communication device to be a terminal device or an access network device.
  • the first communication device may also be other types of devices, such as a core network device, without specific limitation.
  • the communication system may further include at least one other sending device, and the at least one other sending device and the first communication device may be multiplexed.
  • the sending device may be a terminal device or an access network device.
  • the sending device may perform self-transmission and self-reception perception, or self-transmission and other-reception perception, which is not specifically limited in this application.
  • the access network device refers to a device that accesses a terminal device to a wireless network, and may be an evolutionary base station (eNB or eNodeB) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), such as a traditional macro base station eNB and a micro base station eNB in a heterogeneous network scenario; or may be a next generation node B (gNodeB or gNB) in a 5G system; or may be a transmission reception point (TRP); or may be a base station in a future evolved public land mobile network (PLMN); or may be a broadband It may be a broadband network gateway (BNG), an aggregation switch or a non-3GPP access device; or it may be a wireless controller in a cloud radio access network (CRAN); or it may be an access point (AP) in a WiFi system; or it may be a wireless relay node or a wireless backhaul node; or it
  • the terminal device may refer to a user-side device with wireless transceiver functions.
  • the terminal device may also be referred to as user equipment (UE), terminal, access terminal, user unit, user station, mobile station (MS), remote station, remote terminal, mobile terminal (MT), user terminal, wireless communication device, user agent or user device, etc.
  • the terminal may be, for example, a wireless terminal in IoT, V2X, D2D, M2M, 5G network, or future evolved PLMN.
  • the terminal device may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it may also be deployed on the water (such as ships, etc.); it may also be deployed in the air (such as airplanes, balloons and satellites, etc.).
  • the terminal device can be a RedCap UE, a narrowband terminal, a drone, an IoT device (e.g., a sensor, an electric meter, a water meter, etc.), a V2X device, a station (ST) in a wireless local area network (WLAN), a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device (also called a wearable smart device), a tablet computer or Computers with wireless transceiver functions, virtual reality (VR) terminals, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, vehicle terminals, vehicles with vehicle-
  • the relevant functions of the first communication device or the second communication device involved in the present application can be implemented by one device, or by multiple devices together, or by one or more functional modules in one device, or can be one or more chips, or a system on chip (system on chip, SOC) or a chip system.
  • the chip system can be composed of chips, or can include chips and other discrete devices, and the embodiments of the present application do not make specific limitations on this.
  • the above functions can be network elements in hardware devices, software functions running on dedicated hardware, or a combination of hardware and software, or virtualized functions instantiated on a platform (e.g., a cloud platform).
  • a platform e.g., a cloud platform
  • Figure 7a shows a schematic diagram of the structure of the communication device 700 provided in an embodiment of the present application.
  • the communication device 700 includes one or more processors 701 and at least one communication interface 704 (Figure 7a is only exemplary to include a communication interface 704 and a processor 701 as an example for explanation), and optionally, may also include a communication line 702 and a memory 703.
  • Processor 701 can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the processor 701 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 7 a .
  • the processor 701 can be a single-core processor or a multi-core processor.
  • the processor here can include but is not limited to at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller (MCU), or an artificial intelligence processor and other computing devices running software, each of which may include one or more cores for executing software instructions to perform calculations or processing.
  • CPU central processing unit
  • DSP digital signal processor
  • MCU microcontroller
  • an artificial intelligence processor and other computing devices running software each of which may include one or more cores for executing software instructions to perform calculations or processing.
  • the communication line 702 may be used for communication between different components included in the communication device 700 .
  • the communication interface 704 may be used to communicate with other devices or communication networks.
  • the communication interface 704 may be a device such as a transceiver or a transceiver, or may be an input/output interface.
  • the communication interface 704 may also be a transceiver circuit located in the processor 701 to implement signal input and signal output of the processor.
  • the memory 703 may be a device with a storage function.
  • it may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other
  • the memory may be a separate storage medium, an optical disk storage medium (including a compact disc, a laser disc, an optical disk, a digital versatile disc, a Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the memory may be independent and connected to the processor via a communication line 702.
  • the memory may also be integrated with the processor.
  • the memory 703 can be used to store computer execution instructions for executing the solution of the present application, and the execution is controlled by the processor 701, so as to implement the method provided in the embodiment of the present application.
  • the processor 701 may also perform processing-related functions in the method provided in the following embodiments of the present application, and the communication interface 704 may be responsible for the function of communicating with other devices or communication networks in the method provided in the following embodiments of the present application, and the embodiments of the present application do not specifically limit this.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.
  • the communication device 700 may further include an output device 705 and an input device 706.
  • the output device 705 communicates with the processor 701 and may display information in a variety of ways.
  • the output device 705 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector.
  • the input device 706 communicates with the processor 701 and may receive user input in a variety of ways.
  • the input device 706 may be a mouse, a keyboard, a touch screen device, or a sensor device.
  • FIG7b it is a schematic diagram of the structure of another communication device 700 provided in an embodiment of the present application, and the communication device 700 includes a processor 701 and a transceiver 704.
  • FIG7b only shows the main components of the communication device 700.
  • the communication device may further include a memory 703, and an input and output device (not shown in the figure).
  • the processor 701 is mainly used to process the communication protocol and communication data, and to control the entire communication device, execute the software program, and process the data of the software program.
  • the memory 703 is mainly used to store the software program and data.
  • the transceiver 704 may include a radio frequency circuit and an antenna.
  • the radio frequency circuit is mainly used to convert the baseband signal and the radio frequency signal and to process the radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • the processor 701 can read the software program in the memory 703, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 701 performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal outward in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 701.
  • the processor 701 converts the baseband signal into data and processes the data.
  • the RF circuit and antenna may be arranged independently of the processor performing baseband processing.
  • the RF circuit and antenna may be arranged remotely from the communication device.
  • the processor 701 in FIG7b may include a digital signal processor, a signal generator, and an analog-to-digital converter.
  • the radio frequency circuit for signal transmission may include an up-converter and a power amplifier, and the radio frequency circuit for signal reception may include a down-converter and a power amplifier.
  • the antenna may include a transmitting antenna and a receiving antenna.
  • FIG. 7a, FIG. 7b, or FIG. 7c do not constitute a limitation on the communication device.
  • the communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.
  • the components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.
  • the communication device can perform some or all of the steps in the embodiment of the present application, and these steps or operations are only examples.
  • the embodiment of the present application can also perform other operations or variations of various operations.
  • each step can be performed in a different order presented in the embodiment of the present application, and it is possible that not all operations in the embodiment of the present application need to be performed.
  • the signal transmission method provided in the present application can be applied to a perception scenario, or can be applied to a positioning scenario.
  • it can also be applied to scenarios related to perception or positioning, or scenarios derived from perception or positioning.
  • the present application does not specifically limit the application scenarios.
  • the above exemplary application scenarios do not impose any limitations on the solutions of the present application.
  • the signal sending method includes the following steps:
  • a first communication device generates a first signal.
  • the first signal can be used for perception, that is, the first signal can also be called a perception signal or a perception reference signal, and the three can be interchangeable.
  • the first signal can also be other types of signals, such as a positioning signal or a communication signal, which is not specifically limited in this application.
  • the first signal may be generated based on at least one sequence.
  • the sequence may be, for example, a ZC sequence, an m sequence, a Gold sequence, or a Golay complementary pair (GCP) sequence.
  • the first communication device may perform operations such as discrete Fourier transform (DFT), inverse fast Fourier transform (IFFT), adding a cyclic prefix (CP), etc. on at least one sequence to obtain a first signal.
  • DFT discrete Fourier transform
  • IFFT inverse fast Fourier transform
  • CP cyclic prefix
  • the first communication device sends a first signal, and the second communication device receives the signal accordingly.
  • the first signal is mapped to the frequency domain subbands of the N time units, where N is a positive integer greater than 1.
  • the time unit may be a time slot, a micro-time slot, a symbol, or other time units in the time domain, etc.
  • the symbol may be an orthogonal frequency division multiplexing (OFDM) symbol, a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) symbol, a single carrier orthogonal frequency division multiplexing (SC-OFDM) symbol, or an orthogonal time-frequency space (OTFS) symbol.
  • OFDM orthogonal frequency division multiplexing
  • DFT-s-OFDM discrete Fourier transform spread orthogonal frequency division multiplexing
  • SC-OFDM single carrier orthogonal frequency division multiplexing
  • OTFS orthogonal time-frequency space
  • the N time units may be continuous or discontinuous in the time domain, and this application does not make any specific limitation on this.
  • the frequency domain subband of each time unit includes multiple frequency domain units.
  • the frequency domain unit can be a resource element (RE) or a resource block (RB).
  • RE resource element
  • RB resource block
  • the following embodiments of the present application are described by taking the frequency domain unit as RE, that is, the frequency domain subband of each time unit includes multiple REs as an example.
  • RE can also be called a subcarrier, and the two can be interchangeable.
  • the number of frequency domain units included in the frequency domain subbands of different time units may be the same or different, and this application does not make any specific limitation on this.
  • the frequency domain subband of each of the N time units includes a first type of frequency domain region and at least one second type of frequency domain region.
  • the structure of the frequency domain subband of the time unit can be as shown in (a) of FIG9 .
  • the starting time unit and the ending time unit of the N time units include a first-type frequency domain region and one second-type frequency domain region, and the remaining N-2 time units include a first-type frequency domain region and multiple second-type frequency domain regions.
  • i is a positive integer from 1 to N-1.
  • time unit 1 and time unit 3 both include a first-type frequency domain region and one second-type frequency domain region, and time unit 2 includes a first-type frequency domain region and two second-type frequency domain regions.
  • the second-type frequency domain region of time unit 1 overlaps with one second-type frequency domain region of time unit 2
  • the second-type frequency domain region of time unit 3 overlaps with another second-type frequency domain region of time unit 2.
  • the frequency domain subband of the i+1th time unit includes multiple second-class frequency domain regions, and the frequency domain region of the i-th time unit includes one second-class frequency domain region, it can be considered that all the second-class frequency domain regions in the frequency domain subband of the i-th time unit and part of the second-class frequency domain regions in the frequency domain subband of the i+1th time unit partially overlap.
  • the second-class frequency domain region in the frequency domain subband of time unit 1 and part of the second-class frequency domain region (i.e., one second-class frequency domain region) in the frequency domain subband of time unit 2 overlap.
  • the frequency domain subband of the ith time unit in the N time units does not overlap with the frequency domain subband of the i+2th time unit.
  • the frequency domain subband of time unit 1 does not overlap with the frequency domain subband of time unit 3.
  • the highest frequency of the frequency domain subband of the i+1th time unit is greater than the highest frequency of the i-th time unit.
  • the lowest frequency of the frequency domain subband of the i+1th time unit is less than the lowest frequency of the i-th time unit.
  • the first signal is mapped in the first frequency domain region with the first comb teeth, and is mapped in the second frequency domain region with the second comb teeth, and the second comb teeth are smaller than the first comb teeth.
  • the first signal is mapped in the first frequency domain region with a larger comb tooth, and is mapped in the second frequency domain region with a smaller comb tooth.
  • the comb tooth may also be referred to as the comb tooth number.
  • the comb tooth is a positive integer greater than or equal to 1. When the comb tooth is equal to 1, it can also be understood as continuous mapping.
  • mapping position of the first signal within three time units may be as shown in (a) of FIG10 , wherein the slash filled portion indicates the mapping position of the first signal.
  • the signal mapped into the second type of frequency domain region can be used for random phase error estimation.
  • the first type of frequency domain area in the embodiment of the present application may also be called a non-overlapping area or a frequency hopping non-overlapping area
  • the second type of frequency domain area may also be called an overlapping area or a frequency hopping overlapping area.
  • mapping manner of the first signal described above on the N time units and their frequency domain sub-bands can be understood as frequency hopping.
  • the mapping of the signal on the frequency domain subband of the i-th time unit and the frequency domain subband of the i+1-th time unit can be understood as one frequency hopping, that is, the number of frequency hopping of the first signal is equal to N-1.
  • the implementation shown in (a) of FIG10 includes two frequency hoppings.
  • the first signal when the first signal is generated based on a sequence, the first signal may be generated based on N sequences.
  • the nth sequence among the N sequences may be mapped to the frequency domain subband of the nth time unit among the N time units, and the first signal is generated by the N sequences mapped on the frequency domain subband of the N time units, or in other words, the signal in the first signal mapped on the frequency domain subband of the nth time unit is generated based on the nth sequence.
  • the N sequences may not be exactly the same, or may be exactly the same (i.e., one sequence is repeatedly mapped N times), which is not specifically limited in the present application.
  • n is a positive integer from 1 to N.
  • the first signal may be generated based on 1 sequence.
  • the 1 sequence may be divided into N subsequences, and the nth subsequence of the N subsequences may be mapped to the frequency domain subband of the nth time unit of the N time units.
  • the first signal is generated by the N subsequences (or 1 sequence) mapped to the frequency domain subband of the N time units, or the signal in the first signal mapped to the frequency domain subband of the nth time unit is generated based on the nth subsequence of a certain sequence.
  • the second communication device receives the second signal, and the second signal can be understood as the echo signal of the first signal.
  • the second communication device and the first communication device are different devices, the second communication device receives the third signal, and the third signal can be understood as the signal after the first signal is reflected by one or more targets.
  • the second communication device may execute the following step S803.
  • S803 The second communication device processes the received signal according to the first signal.
  • the received signal namely the second signal or the third signal, may refer to the relevant description in the above step S802, which will not be repeated here.
  • the second communication device may jointly process the signals mapped on the frequency domain subbands of the respective N time units to obtain an equivalent received signal with a larger bandwidth (ie, the second signal or the third signal), and process the equivalent received signal.
  • processing the received signal according to the first signal may include: the second communication device processes the received signal according to a sequence for generating the first signal (recorded as a sending sequence).
  • the second communication device may sample the received signal to obtain a receiving sequence, and then perform a correlation operation on the sending sequence and the receiving sequence, so as to sense information such as the distance, direction, and speed of the target according to the correlation operation result.
  • the second communication device may also perform random phase error estimation based on the signal transmitted in the second type of frequency domain region of each time unit, and perform random phase error compensation based on the estimation result.
  • the transmitter maps the signal on the frequency domain subbands of multiple time units to achieve frequency hopping, so that the receiver can equate the signals mapped on the frequency domain subbands of multiple time units to received signals with larger bandwidths.
  • the requirements for the ADC sampling rate of the transmitter can be reduced, and the signal transmission capabilities of devices such as RedCap UE can also be adapted.
  • larger comb teeth are used for mapping in the first type of frequency domain area in the frequency domain subbands of each time unit, and smaller comb teeth are used for mapping in the overlapping area (i.e., the second type of frequency domain area).
  • the bandwidth occupied by the overlapping area can be reduced, and the actual increased bandwidth of frequency hopping can be increased, thereby reducing the number of frequency hopping times and service (such as perception or positioning) delays.
  • the frequency domain subbands of the N time units satisfy at least one of the following relationships:
  • the frequency domain subbands of N time units belong to the same carrier
  • the frequency domain subbands of N time units belong to the same bandwidth part (BWP) of the same carrier;
  • the frequency domain subbands of N time units belong to the same resource pool of the same carrier
  • the frequency domain subbands of N time units belong to adjacent BWPs of the same carrier
  • the frequency domain subbands of N time units belong to adjacent resource pools of the same carrier; or,
  • the frequency domain subbands of the N time units belong to different carriers of intra-band carrier aggregation.
  • the frequency domain subbands of N time units belong to adjacent BWPs or adjacent resource pools of the same carrier, it means that the frequency domain subbands of one or some time units are allowed to span at least two adjacent BWPs or resource pools.
  • the frequency domain subbands of N time units belong to different carriers of intra-band carrier aggregation, it means that the frequency domain subbands of one or some time units are allowed to span at least two adjacent carriers of intra-band carrier aggregation.
  • the frequency domain subbands of time unit 1 and time unit 3 are respectively located in BWP1 and BWP2, and the frequency domain subband of time unit 2 includes a part of the subband located in BWP1 and a part of the subband located in BWP2.
  • the part of the frequency domain subband of time unit 2 located in BWP1 overlaps with the frequency domain subband of time unit 1 in the second type of frequency domain region, and the part of the frequency domain subband of time unit 2 located in BWP2 overlaps with the frequency domain subband of time unit 3.
  • the second type of frequency domain region overlaps.
  • Method 1 Different transmitting end devices transmit signals on frequency domain subbands of different time unit groups.
  • the time unit group includes a plurality of time units.
  • the time unit, the frequency domain subband of the time unit, and the signal mapping method can refer to the description in the above step S801 and step S802, which will not be repeated here.
  • the two time unit groups being different may be understood as: the time units included in the two time unit groups do not overlap in the time domain.
  • UE 1 corresponds to time unit group 1 (including N1 time units)
  • UE 2 corresponds to time unit group 2 (including N2 time units). That is, UE 1 can send signal 1 on the frequency domain subband of N1 time units included in time unit group 1, and UE 2 can send signal 2 on N2 time units included in time unit group 2.
  • the number of time units included in the time unit groups corresponding to different transmitting end devices may be the same or different.
  • the above N1 and N2 may be the same or different.
  • the number of frequency domain units included in the second type of frequency domain area in the frequency domain subbands corresponding to different transmitting end devices may be the same or different.
  • the number of frequency hopping times, the value of N i.e., the number of time units included in the time unit group
  • the number of frequency domain units included in the second type of frequency domain area corresponding to the resource pool may be preconfigured or predefined. That is, the number of frequency hopping times, the value of N, or the number of frequency domain units included in the second type of frequency domain area may be preset values.
  • the number of time units included in the time unit group corresponding to the multiple transmitting end devices sharing the same resource pool is the same, and the number of frequency domain units included in the second type of frequency domain area is also the same.
  • the time unit group 1 and the time unit 2 corresponding to UE 1 and UE 2 respectively include 3 time units, and the second type of frequency domain area includes 4 frequency domain units, as shown in (b) of FIG10 , the time unit group 1 includes time unit 1, time unit 2, and time unit 3, and the time unit group 2 includes time unit 4, time unit 5, and time unit 6. That is, UE 1 performs frequency hopping on the frequency domain subbands of time unit 1, time unit 2, and time unit 3 to send signal 1, and UE 2 performs frequency hopping on the frequency domain subbands of time unit 4, time unit 5, and time unit 6 to send signal 2.
  • FIG10 is illustrated by taking UE 1 and UE 2 using the same first comb teeth and second comb teeth as an example.
  • different transmitting end devices may also use different first comb teeth and second comb teeth, and this application does not make specific limitations on this.
  • (b) in FIG. 10 is explained by taking as an example the case where the lowest frequency of the frequency domain subband of time unit 6 is lower than the lowest frequency of the frequency domain subband of time unit 5, and the lowest frequency of the frequency domain subband of time unit 5 is lower than the lowest frequency of the frequency domain subband of time unit 4.
  • the highest frequency of the frequency domain subband of time unit 6 may be higher than the highest frequency of the frequency domain subband of time unit 5, and the highest frequency of the frequency domain subband of time unit 5 may be higher than the highest frequency of the frequency domain subband of time unit 4.
  • the mapping positions of signal 2 in time unit 4, time unit 5, and time unit 6 are respectively the same as the mapping positions of signal 1 in time unit 1, time unit 2, and time unit 3.
  • the number of frequency domain units included in the second type of frequency domain region can be determined by the signal-to-noise ratio (SNR) required for random phase error estimation.
  • SNR signal-to-noise ratio
  • different transmitting end devices can determine the number of frequency domain units included in the second type of frequency domain area according to the SNR required for their own random phase error estimation when hopping.
  • the number of frequency domain units included in the second type of frequency domain area can be positively correlated with the required SNR. For example, the larger the SNR required for random phase error estimation, the more frequency domain units included in the second type of frequency domain area; the smaller the SNR required for random phase error estimation, the fewer frequency domain units included in the second type of frequency domain area.
  • the transmitting end device may determine, according to the required SNR, that the second type of frequency domain region includes frequency domain units that are an integer multiple of P.
  • P is a positive integer greater than or equal to K
  • K is a first comb tooth.
  • the receiving end device may determine the number of frequency domain units included in the second type of frequency domain area according to the SNR required for random phase error estimation, and then indicate the number of frequency domain units included in the second type of frequency domain area to the transmitting end device.
  • the number of frequency domain units included in the second frequency domain area can be flexibly adjusted according to actual needs, which is more flexible than the second frequency domain area including a fixed number of frequency domain units.
  • the second frequency domain area can include fewer frequency domain units, which can further reduce the bandwidth occupied by the second frequency domain area and increase the actual increased bandwidth of frequency hopping, thereby reducing the number of frequency hopping and perception (or positioning) delay.
  • Method 2 Different transmitting end devices transmit signals on the frequency domain sub-band of the same time unit group through comb-division multiplexing.
  • UE 1 and UE 2 both send signals on the frequency domain subbands of time unit 1, time unit 2, and time unit 3.
  • different transmitting end devices may perform comb division multiplexing in the first type of frequency domain region in the frequency domain subband of the time unit group. That is, different transmitting end devices use the same first comb teeth.
  • the number of transmitting end devices performing comb division multiplexing is less than or equal to the first comb teeth.
  • each transmitting end device when the second comb tooth is greater than 1, different transmitting end devices can be comb-multiplexed in the second type of frequency domain region.
  • the signal (or element in the sequence) of each transmitting end device may need to be mapped to each frequency domain unit of the second type of frequency domain region.
  • each transmitting end device can use orthogonal cover code (OCC) to modulate the elements that originally need to be mapped in the second type of region to reduce interference between multiple transmitting end devices.
  • OCC orthogonal cover code
  • UE 1 and UE 2 perform 2-comb-tooth comb division multiplexing in the first frequency domain area of time unit 1, time unit 2, and time unit 3.
  • the signals of UE 1 and UE 2 need to be mapped to each frequency domain unit of the second frequency domain area. Therefore, UE 1 and UE 2 can use OCC code to modulate the elements that originally need to be mapped in the second area.
  • sequence 1 the signal on the frequency domain subband mapped to the nth time unit in the N time units in the first signal is generated according to a sequence of length M (referred to as sequence 1):
  • M1 elements can be mapped in the first type of frequency domain area of the nth time unit, and the remaining M-M1 elements can be mapped in the second type of frequency domain area of the nth time unit.
  • the remaining M-M1 elements can be modulated according to the base sequence and the OCC code of length L.
  • n is a positive integer from 1 to N.
  • M, M-M1, and L are positive integers.
  • n when the value of n is different, the corresponding values of M and M1 may be different, that is, the lengths of the sequences (or subsequences) mapped on the frequency domain subbands of different time units in the time unit group may be different.
  • the length of the base sequence may be M-M1, that is, the base sequence may include M-M1 elements.
  • the above M1 elements of sequence 1 and the M-M1 elements of the base sequence may belong to the same sequence (recorded as sequence 2). That is, sequence 1 is composed of the M1 elements of sequence 2 and the M-M1 elements obtained by modulating the remaining M-M1 elements of sequence 2 and the OCC code.
  • sequence 1 can be [1,2,3,4,5,6,7,8,9,10,11,12,13,14].
  • sequence 1 can be [1,2,3,4,5,6,7,8,9,10,X1,X2,X3,X4].
  • [X1,X2,X3,X4] can be understood as 4 elements obtained by modulating [11,12,13,14] and an OCC code of length L.
  • the length of the base sequence may be M-M1, that is, the base sequence may include M-M1 elements.
  • the M1 elements of sequence 1 and the M-M1 elements of the base sequence may not belong to the same sequence.
  • the M1 elements of sequence 1 constitute a sequence alone, and the M-M1 elements of the base sequence constitute another sequence.
  • the length L of the OCC code is a positive integer greater than or equal to the first comb tooth.
  • the length L of the OCC code is a positive integer greater than or equal to 2.
  • the number of frequency domain units included in the second type of frequency domain region is a positive integer multiple of L, that is, the number of frequency domain units included in the second type of frequency domain region is greater than or equal to L.
  • the second type of frequency domain region includes 4 frequency domain units, and the length of the OCC code can be, for example, 2 or 4.
  • M-M1 is a positive integer multiple of L. That is, the number of elements mapped into the second type of frequency domain region is a positive integer multiple of the length of the OCC code.
  • obtaining the remaining M-M1 elements of sequence 1 according to the base sequence and an OCC code with a length of L may include: using an OCC code with a length of L to modulate the base sequence to obtain the remaining M-M1 elements of sequence 1.
  • modulating the base sequence using an OCC code of length L may include: grouping the elements of the base sequence according to the length of the OCC code to obtain at least one element group, and then modulating each element group using the OCC code.
  • the M-M1 elements may be divided into (M-M1)/L element groups, each element group including L elements, that is, modulating the L elements as a group.
  • the base sequence with a length of 4 can be divided into 2 element groups, and the 2 element groups are modulated respectively by using the OCC code with a length of 2. If the length L of the OCC code is equal to 4, then as shown in (b) of FIG13 , the base sequence with a length of 4 can be used as an element group, and the element group is modulated by using the OCC code with a length of 4.
  • the number of frequency hopping times, the value of N (i.e., the number of time units included in the time unit group), or the number of frequency domain units included in the second type of frequency domain area can be preconfigured or predefined.
  • the number of frequency domain units included in the second type of frequency domain area can be determined by the SNR required for random phase error estimation. Please refer to the relevant instructions in the above method one, which will not be repeated here.
  • the above-mentioned comb multiplexing may exist on frequency domain subbands of multiple time unit groups.
  • the other two transmitting end devices can perform comb-division multiplexing on the frequency domain subband of time unit group 2 (including time unit 4, time unit 5, and time unit 6) to respectively send signal 3 and signal 4.
  • the comb-division multiplexing on the frequency domain subband of time unit group 2 can refer to the relevant description of comb-division multiplexing above, which will not be repeated here.
  • (a) in FIG. 12 is described by taking the first comb teeth, the second comb teeth, the number of frequency domain units included in the second type of frequency domain area, and the length of the OCC code corresponding to two time unit groups as an example.
  • one or more of the first comb teeth, the second comb teeth, the number of frequency domain units included in the second type of frequency domain area, and the length of the OCC code corresponding to different time unit groups may also be different, and this application does not specifically limit this.
  • different transmitting end devices can be combed and multiplexed on the frequency domain subband of the same time unit group, thereby improving resource utilization.
  • the use of OCC code modulation mapped to the elements of the second type of frequency domain area can reduce the interference between the various transmitting end devices in the second type of frequency domain area, thereby reducing the impact of the interference between the various transmitting end devices on the random phase error estimation, and improving the accuracy of the random phase error estimation.
  • the number of frequency domain units included in the second type of frequency domain region used by each of them may be the same or different.
  • the number of frequency domain units included in the second type of frequency domain region of UE 1 and UE 2 is the same, both 4.
  • the number of frequency domain units included in the second type of frequency domain region of UE 1 and UE 2 may also be different.
  • the second type of frequency domain region of UE 1 may include 4 frequency domain units, that is, UE 1 uses the signals on the 4 frequency domain units overlapped between two frequency hops to perform random phase error estimation;
  • the second type of frequency domain region of UE 2 may include 2 frequency domain units, that is, UE 2 uses the signals on the 2 frequency domain units overlapped between two frequency hops to perform random phase error estimation.
  • the number of frequency domain units included in the second frequency domain region of each transmitting end device can be determined based on the SNR required for random phase error estimation. Based on the example shown in (b) of Figure 12, the SNR required for UE 2 to perform random phase error estimation may be smaller than the SNR required for UE 1 to perform random phase error estimation.
  • each transmitting end device may adopt OCC code modulation to map the elements in the second frequency domain region. Please refer to the relevant description of the above OCC code modulation, which will not be repeated here.
  • UE 1 and UE 2 can both use an OCC code with a length of 2 to modulate the elements mapped in their respective second-type frequency domain regions.
  • the transmitting device may also use OCC code modulation to map the elements in the overlapping area.
  • the frequency domain unit 21 of the time unit 1 is located in the second frequency domain area of UE 1 and in the first frequency domain area of UE 2, then UE 2 can use OCC code modulation to map the elements of UE 2 on the frequency domain unit 21.
  • different transmitting end devices can perform combing multiplexing on the frequency domain subbands of the same time unit group, thereby improving resource utilization.
  • different transmitting end devices can flexibly adjust the number of frequency domain units included in the second type of frequency domain area according to actual needs, which is more flexible than the second type of frequency domain area including a fixed number of frequency domain units.
  • the method and/or step implemented by the first communication device can also be implemented by a component (such as a processor, a chip, a chip system, a circuit, a logic module, or software such as a chip or a circuit) that can be used for the first communication device.
  • the method and/or step implemented by the second communication device can also be implemented by a component (such as a processor, a chip, a chip system, a circuit, a logic module, or software such as a chip or a circuit) that can be used for the second communication device.
  • the above mainly introduces the scheme provided by the present application. Accordingly, the present application also provides a communication device, which is used to implement the above various methods.
  • the communication device can be the first communication device in the above method embodiment, or a device including the above first communication device, or a component that can be used for the first communication device; or, the communication device can be the second communication device in the above method embodiment, or a device including the above second communication device, or a component that can be used for the second communication device.
  • the communication device includes hardware structures and/or software modules corresponding to the execution of each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.
  • the communication device can be divided into functional modules according to the above method embodiment.
  • each functional module can be divided into
  • the functions of the processing module can be divided into various functional modules, or two or more functions can be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.
  • Fig. 14 shows a schematic diagram of the structure of a communication device 140.
  • the communication device 140 includes a processing module 1401 and a transceiver module 1402.
  • the communication device 140 can be used to implement the functions of the first communication device or the second communication device.
  • the communication device 140 may further include a storage module (not shown in FIG. 14 ) for storing program instructions and data.
  • the transceiver module 1402 may also be referred to as a transceiver unit for implementing a sending and/or receiving function.
  • the transceiver module 1402 may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.
  • the transceiver module 1402 may include a receiving module and a sending module, which are respectively used to execute the receiving and sending steps performed by the first communication device or the second communication device in the above-mentioned method embodiment, and/or used to support other processes of the technology described in this document; the processing module 1401 may be used to execute the processing steps (such as determination, generation, etc.) performed by the first communication device or the second communication device in the above-mentioned method embodiment, and/or used to support other processes of the technology described in this document.
  • the processing module 1401 may be used to execute the processing steps (such as determination, generation, etc.) performed by the first communication device or the second communication device in the above-mentioned method embodiment, and/or used to support other processes of the technology described in this document.
  • the processing module 1401 is used to generate a first signal; the transceiver module 1402 is used to send the first signal.
  • the first signal is mapped to the frequency domain subbands of each of the N time units, and the frequency domain subband of each time unit includes a first type of frequency domain region and at least one second type of frequency domain region. At least one second type of frequency domain region in the frequency domain subband of the i-th time unit and at least one second type of frequency domain region in the frequency domain subband of the i+1-th time unit overlap, N is a positive integer greater than 1, and i is a positive integer from 1 to N-1.
  • the first signal is mapped in the first type of frequency domain region with a first comb tooth and mapped in the second type of frequency domain region with a second comb tooth, and the second comb tooth is smaller than the first comb tooth.
  • the transceiver module 1402 is further used to receive a second signal, where the second signal is an echo signal of the first signal; and the processing module 1401 is further used to process the second signal according to the first signal.
  • the transceiver module 1402 is used to receive a third signal, where the third signal is a signal of the first signal after being reflected by a target; the processing module 1401 is used to process the third signal according to the first signal.
  • the first signal is mapped to the frequency domain subbands of each of the N time units, and the frequency domain subband of each time unit includes a first type of frequency domain region and at least one second type of frequency domain region; at least one second type of frequency domain region in the frequency domain subband of the i-th time unit and at least one second type of frequency domain region in the frequency domain subband of the i+1-th time unit overlap, N is a positive integer greater than 1, and i is a positive integer from 1 to N-1.
  • the first signal is mapped in the first type of frequency domain region with a first comb tooth, and mapped in the second type of frequency domain region with a second comb tooth, and the second comb tooth is smaller than the first comb tooth;
  • the communication device 140 is presented in the form of dividing various functional modules in an integrated manner.
  • the "module” here may refer to a specific application-specific integrated circuit (ASIC), a circuit, a processor and a memory that executes one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above functions.
  • ASIC application-specific integrated circuit
  • the communication device 140 may take the form of the communication device 700 shown in FIG. 7 a .
  • the function/implementation process of the processing module 1401 in Figure 14 can be implemented by the processor 701 in the communication device 700 shown in Figure 7a calling the computer execution instructions stored in the memory 703, and the function/implementation process of the transceiver module 1402 in Figure 14 can be implemented by the communication interface 704 in the communication device 700 shown in Figure 7a.
  • the communication device described in the embodiment of the present application can also be implemented using the following: one or more field programmable gate arrays (FPGA), programmable logic devices (PLD), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits that can perform the various functions described throughout the present application.
  • FPGA field programmable gate arrays
  • PLD programmable logic devices
  • state machines gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits that can perform the various functions described throughout the present application.
  • the function/implementation process of the transceiver module 1402 can be implemented through the input and output interface (or communication interface) of the chip or the chip system, and the function/implementation process of the processing module 1401 can be implemented through the processor (or processing circuit) of the chip or the chip system.
  • the communication device 140 provided in this embodiment can execute the above method, the technical effects that can be obtained can refer to the above method embodiments and will not be repeated here.
  • the present application also provides a communication device, the communication device comprising a processor, for implementing any of the above aspects.
  • the communication device comprising a processor, for implementing any of the above aspects. The method in the embodiment.
  • the communication device further includes a memory.
  • the memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the method in any of the above method embodiments.
  • the memory may not be in the communication device.
  • the communication device also includes an interface circuit, which is a code/data read/write interface circuit, which is used to receive computer execution instructions (computer execution instructions are stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor.
  • an interface circuit which is a code/data read/write interface circuit, which is used to receive computer execution instructions (computer execution instructions are stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor.
  • the communication device further includes a communication interface, and the communication interface is used to communicate with a module outside the communication device.
  • the communication device can be a chip or a chip system.
  • the communication device can be composed of chips, or it can include chips and other discrete devices.
  • the embodiments of the present application do not specifically limit this.
  • the present application also provides a computer-readable storage medium on which a computer program or instruction is stored.
  • a computer program or instruction is stored on which a computer program or instruction is stored.
  • the present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.
  • the systems, devices and methods described in the present application can also be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, i.e., they may be located in one place, or they may be distributed over multiple network units.
  • the components shown as units may or may not be physical units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.
  • the computer-readable storage medium may be any available medium that a computer can access or may contain one or more servers, data centers and other data storage devices that can be integrated with the medium.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.
  • the computer may include the aforementioned device.

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Abstract

本申请提供一种信号发送方法及装置，可以降低跳频重叠区域占用的带宽，提高跳频实际增加的带宽，从而降低跳频次数和感知时延。该方法包括：第一通信设备生成并发送第一信号。其中，第一信号映射于N个时间单元各自的频域子带上，每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域。第i个时间单元的频域子带中的至少一个第二类频域区域和第i+1个时间单元的频域子带中的至少一个第二类频域区域是重叠的，N为大于1的正整数，i为1至N-1的正整数。其中，第一信号以第一梳齿映射在第一类频域区域内，以第二梳齿映射在第二类频域区域内，第二梳齿小于第一梳齿。

Description

一种信号发送方法及装置
本申请要求于2022年11月18日提交国家知识产权局、申请号为202211445839.7、申请名称为“一种跳频感知方法及感知设备”的中国专利申请的优先权，以及要求于2022年12月26日提交国家知识产权局、申请号为202211675954.3、申请名称为“一种信号发送方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信领域，尤其涉及一种信号发送方法及装置。
背景技术
为了实现高测距分辨率，可以使用跳频的方式发送感知信号。在该方式中，示例性的，如图1所示，感知设备可以在连续的多个符号内发送中心频率不同但频谱连续的感知信号。但是，该跳频方式会在相邻的子载波间引入随机的相位误差，从而影响测距精度。
为了消除该随机相位误差，如图2所示，感知设备可以在每次跳频时保持一部分子载波重叠。在之后的联合处理中，通过重叠部分的子载波估计随机相位误差并进行补偿。
然而，在感知设备采用多梳齿映射的场景下，重叠部分的子载波占用的等效带宽过大，导致每次跳频时实际增加的带宽变小，从而导致跳频次数增加，感知时延增大。
发明内容
本申请提供一种信号发送方法及装置，可以降低跳频重叠区域占用的带宽，提高跳频实际增加的带宽，从而降低跳频次数和时延。
第一方面，提供了一种信号发送方法，该方法可以由第一通信设备执行，也可以由第一通信设备的部件，例如第一通信设备的处理器、芯片、或芯片系统等执行，还可以由能实现全部或部分第一通信设备功能的逻辑模块或软件实现。该方法包括：
生成并发送第一信号。其中，第一信号映射于N个时间单元各自的频域子带上，每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域。该N个时间单元中的第i个时间单元的频域子带中的至少一个第二类频域区域和第i+1个时间单元的频域子带中的至少一个第二类频域区域是重叠的，N为大于1的正整数，i为1至N-1的正整数。并且，第一信号以第一梳齿映射在第一类频域区域内，以第二梳齿映射在第二类频域区域内，第二梳齿小于第一梳齿。
基于该方案，第一通信设备在多个时间单元的频域子带上发送信号，使得接收端可以将多个时间单元的频域子带上映射的信号等效为带宽较大的接收信号，相比于在一个时间单元的频域子带上映射带宽较大的信号，可以降低对发送端ADC采样率的要求，也可以适配RedCap UE等设备的信号发送能力。此外，在各个时间单元的频域子带中的第一类频域区域内采用较大的梳齿进行映射，在重叠区域(即第二类频域区域)内采用较小的梳齿进行映射，相比于第一类频域区域和第二类频域区域采用相同的梳齿映射，能够降低重叠区域占用的带宽，提高跳频实际增加的带宽，从而降低跳频次数和业务(例如感知或定位)时延。
在一种可能的设计中，该方法还包括：接收第二信号，并根据第一信号对第二信号进行处理。其中，第二信号为第一信号的回波信号。
第二方面，提供了一种信号处理方法，该方法可以由第二通信设备执行，也可以由第二通信设备的部件，例如第二通信设备的处理器、芯片、或芯片系统等执行，还可以由能实现全部或部分第二通信设备功能的逻辑模块或软件实现。该方法包括：
接收第三信号，并根据第一信号对第三信号进行处理。第三信号是第一信号经过目标反射后的信号。其中，第一信号映射于N个时间单元各自的频域子带上，每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域。第i个时间单元的频域子带中的至少一个第二类频域区域和第i+1个时间单元的频域子带中的至少一个第二类频域区域是重叠的，N为大于1的正整数，i为1至N-1的正整数。并且，第一信号以第一梳齿映射在第一类频域区域内，以第二梳齿映射在第二类频域区域内，第二梳齿小于第一梳齿；
基于该方案，第一信号映射在多个时间单元的频域子带上，使得第二通信设备可以将多个时间单元的频域子带上映射的信号等效为带宽较大的接收信号，相比于在一个时间单元的频域子带上映射带宽较大的 信号，可以降低对发送端ADC采样率的要求，也可以适配RedCap UE等设备的信号发送能力。此外，在各个时间单元的频域子带中的第一类频域区域内采用较大的梳齿进行映射，在重叠区域(即第二类频域区域)内采用较小的梳齿进行映射，相比于第一类频域区域和第二类频域区域采用相同的梳齿映射，能够降低重叠区域占用的带宽，提高跳频实际增加的带宽，从而降低跳频次数和业务(例如感知或定位)时延。
结合第一方面或第二方面，在一种可能的设计中，每个时间单元的频域子带包括多个频域单元；N个时间单元的频域子带满足以下多项关系中的至少一项：属于同一载波；属于同一载波的同一带宽部分BWP；属于同一载波的同一资源池；属于同一载波的相邻BWP；属于同一载波的相邻资源池；或者，属于带内载波聚合的不同载波。
结合第一方面或第二方面，在一种可能的设计中，第一信号中映射于第i个时间单元的频域子带上的信号是根据长度为M的序列生成的。长度为M的序列中，M1个元素映射在第一类频域区域内，剩余M-M1个元素映射在第二类频域区域内。其中，M-M1个元素是根据基序列和长度为L的正交掩码调制得到的，L为正整数。
基于该可能的设计，第一通信装置采用OCC码调制映射于第二类频域区域的元素，在不同发送端装置在同一时间单元组的频域子带上进行梳分复用的情况下，可以降低第二类频域区域内各个发送端装置之间的干扰，从而降低各个发送端装置之间的干扰对随机相位误差估计的影响，提高随机相位误差估计的准确性。
结合第一方面或第二方面，在一种可能的设计中，第二类频域区域包括的频域单元的数量是L的正整数倍，和/或，M-M1是L的正整数倍。
结合第一方面或第二方面，在一种可能的设计中，L为大于或等于第一梳齿的正整数。
结合第一方面或第二方面，在一种可能的设计中，N的取值和/或第二类频域区域包括的频域单元的数量为预设值。
结合第一方面或第二方面，在一种可能的设计中，第二类频域区域包括的频域单元的数量由随机相位误差估计所需的信噪比SNR确定。
基于该可能的设计，可以根据实际需求灵活调整第二类频域区域包括的频域单元的数量，相比于第二类频域区域包括固定数量的频域单元，灵活性较高。此外，在进行随机相位误差估计时所需的SNR较低的情况下，第二类频域区域可以包括较少的频域单元，相比于第二类频域区域包括较多的固定数量的频域单元，可以进一步降低第二类频域区域占用的带宽，提高跳频实际增加的带宽，从而降低跳频次数和感知(或定位)时延。
结合第一方面或第二方面，在一种可能的设计中，时间单元为符号，或者，时间单元为时隙。
结合第一方面或第二方面，在一种可能的设计中，第一通信设备为终端设备或接入网设备。
第三方面，提供了一种通信装置用于实现上述各种方法。该通信装置可以为上述第一方面中的第一通信设备，或者第一通信设备中包含的装置，比如芯片或芯片系统；或者，该通信装置可以为上述第二方面中的第二通信设备，或者第二通信设备中包含的装置，比如芯片或芯片系统。所述通信装置包括实现上述方法相应的模块、单元、或手段(means)，该模块、单元、或means可以通过硬件实现，软件实现，或者通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块或单元。
在一些可能的设计中，该通信装置可以包括处理模块和收发模块。该收发模块，也可以称为收发单元，用以实现上述任一方面及其任意可能的实现方式中的发送和/或接收功能。该收发模块可以由收发电路，收发机，收发器或者通信接口构成。该处理模块，可以用于实现上述任一方面及其任意可能的实现方式中的处理功能。
在一些可能的设计中，收发模块包括发送模块和接收模块，分别用于实现上述任一方面及其任意可能的实现方式中的发送和接收功能。
第四方面，提供了一种通信装置，包括：处理器和存储器；该存储器用于存储计算机指令，当该处理器执行该指令时，以使该通信装置执行上述任一方面所述的方法。该通信装置可以为上述第一方面中的第一通信设备，或者第一通信设备中包含的装置，比如芯片或芯片系统；或者，该通信装置可以为上述第二方面中的第二通信设备，或者第二通信设备中包含的装置，比如芯片或芯片系统。
第五方面，提供一种通信装置，包括：处理器和通信接口；该通信接口，用于与该通信装置之外的模块通信；所述处理器用于执行计算机程序或指令，以使该通信装置执行上述任一方面所述的方法。该通信装置可以为上述第一方面中的第一通信设备，或者第一通信设备中包含的装置，比如芯片或芯片系统；或者，该通信装置可以为上述第二方面中的第二通信设备，或者第二通信设备中包含的装置，比如芯片或芯 片系统。
第六方面，提供了一种通信装置，包括：接口电路和处理器，该接口电路为代码/数据读写接口电路，该接口电路用于接收计算机执行指令(计算机执行指令存储在存储器中，可能直接从存储器读取，或可能经过其他器件)并传输至该处理器；处理器用于执行计算机执行指令以使该通信装置执行上述任一方面所述的方法。该通信装置可以为上述第一方面中的第一通信设备，或者第一通信设备中包含的装置，比如芯片或芯片系统；或者，该通信装置可以为上述第二方面中的第二通信设备，或者第二通信设备中包含的装置，比如芯片或芯片系统。
第七方面，提供了一种通信装置，包括：至少一个处理器；所述处理器用于执行计算机程序或指令，以使该通信装置执行上述任一方面所述的方法。该通信装置可以为上述第一方面中的第一通信设备，或者第一通信设备中包含的装置，比如芯片或芯片系统；或者，该通信装置可以为上述第二方面中的第二通信设备，或者第二通信设备中包含的装置，比如芯片或芯片系统。
在一些可能的设计中，该通信装置包括存储器，该存储器，用于保存必要的程序指令和数据。该存储器可以与处理器耦合，或者，也可以独立于该处理器。
在一些可能的设计中，该通信装置可以是芯片或芯片系统。该装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件。
第八方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在通信装置上运行时，使得通信装置可以执行上述任一方面所述的方法。
第九方面，提供了一种包含指令的计算机程序产品，当其在通信装置上运行时，使得该通信装置可以执行上述任一方面所述的方法。
可以理解的是，第三方面至第九方面中任一方面提供的通信装置是芯片时，上述的发送动作/功能可以理解为输出信息，上述的接收动作/功能可以理解为输入信息。
其中，第三方面至第九方面中任一种设计方式所带来的技术效果可参见上述第一方面或第二方面中不同设计方式所带来的技术效果，在此不再赘述。
附图说明
图1为本申请提供的一种跳频方式的示意图；
图2为本申请提供的另一种跳频方式的示意图；
图3为本申请提供的一种跳频方式引入的随机相位误差的示意图；
图4为本申请提供的一种采用不同梳齿进行跳频时的带宽占用示意图；
图5为本申请提供的一种通信系统的结构示意图；
图6为本申请提供的另一种通信系统的结构示意图；
图7a为本申请提供的一种通信装置的结构示意图；
图7b为本申请提供的另一种通信装置的结构示意图；
图7c为本申请提供的又一种通信装置的结构示意图；
图8为本申请提供的一种信号发送方法的流程示意图；
图9为本申请提供的一种第一类频域区域和第二类频域区域的示意图；
图10为本申请提供的一种在第一类频域区域和第二类频域区域采用不同梳齿映射时的跳频方式示意图；
图11为本申请提供的一种多个时间单元的频域子带之间的位置关系示意图；
图12为本申请提供的一种在时间单元的频域子带上进行梳分复用的示意图；
图13为本申请提供的一种OCC码调制的示意图；
图14为本申请提供的再一种通信装置的结构示意图。
具体实施方式
在本申请的描述中，除非另有说明，“/”表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；本申请中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A，B可以是单数或者复数。
在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。“以下至少一项(个)”或其类似表 达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念，便于理解。
可以理解，说明书通篇中提到的“实施例”意味着与实施例有关的特定特征、结构或特性包括在本申请的至少一个实施例中。因此，在整个说明书各个实施例未必指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。可以理解，在本申请的各种实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
可以理解，在本申请中，“…时”以及“若”均指在某种客观情况下会做出相应的处理，并非是限定时间，且也不要求实现时要有判断的动作，也不意味着存在其它限定。
可以理解，本申请实施例中的一些可选的特征，在某些场景下，可以不依赖于其他特征，比如其当前所基于的方案，而独立实施，解决相应的技术问题，达到相应的效果，也可以在某些场景下，依据需求与其他特征进行结合。相应的，本申请实施例中给出的装置也可以相应的实现这些特征或功能，在此不予赘述。
本申请中，除特殊说明外，各个实施例之间相同或相似的部分可以互相参考。在本申请中各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。以下所述的本申请实施方式并不构成对本申请保护范围的限定。
目前，在感知、雷达、或通信感知一体化等系统中无线感知技术被广泛应用。无线感知的原理可以简单描述为：发送端向某一特定空间发送感知信号，该感知信号遇到目标反射后形成回波信号，接收端接收该回波信号，对回波信号和感知信号进行对比分析，以得到目标的距离、速度、方位等信息。
通常情况下，感知的测距分辨率正比于感知信号的带宽，即ΔR＝c/2B，其中，ΔR为测距分辨率，c为光速，B为感知信号的带宽。例如，为了达到0.3米(m)的测距分辨率，感知信号的带宽需要大于或等于500兆赫兹(mega hertz，MHz)，这对发送端模数转换器(analog to digital converter，ADC)的采样率提出了很高的要求。即，为了不损失测距精度，发送端的ADC采样率至少要达到500MHz。此外，对于发送端设备为能力缩减(reduced capacity，RedCap)用户设备(user equipment，UE)的场景，由于RedCap UE发送信号的带宽有限，因此，该场景下也很难实现高精度测距。
为了降低对发送端ADC采样率的要求，同时支持RedCap UE实现高精度测距，可以使用跳频的方式发送感知信号。
示例性的，参见图1，采用跳频的方式时，发送端可以在多个符号内发送中心频率不同但频谱连续的感知信号。其中，该多个符号可以连续也可以不连续，图1中以发送端在4个连续的符号内发送感知信号为例进行说明。
示例性的，发送端在两个符号上发送中心频率不同但频谱连续的感知信号，可以理解为一次跳频。例如，参见图1，发送端在符号1和符号2上发送中心频率不同但频谱连续的感知信号可以理解为一次跳频，在符号2和符号3上发送中心频率不同但频谱连续的感知信号可以理解为一次跳频。以此类推，若发送端在N个符号上发送中心频率不同但频谱连续的感知信号，则该过程可以包括N-1次跳频。
基于跳频方式，由于单个符号内感知信号占用的带宽较小，因此对发送端ADC采样率的要求较低，同时可以适配RedCap UE的信号发送能力。此外，由于多个符号上的频谱连续，因此，该多个符号上发送的感知信号可以在接收端联合处理为一个等效的带宽较大的感知信号，从而实现高精度测距。
但是，采用跳频方式发送感知信号的情况下，在每次跳频时，发送端的射频电路中对频率敏感的各类器件，如锁相环(phase locked loop，PLL)、低噪声放大器(low noise amplifier，LNA)、功率放大器(power amplifier，PA)等，会在相邻子载波间引入[0,2π]范围内的随机相位误差。该随机相位误差会影响测距精度，且不可忽略。
示例性的，如图3所示，符号1和符号2上的相邻子载波间、符号2和符号3上的相邻子载波间、以 及符号3和符号4上的相邻子载波间分别存在随机相位误差
为了消除随机相位误差带来的影响，发送端在每次跳频时会保持一部分子载波重叠(称为跳频重叠区域)。示例性的，如图2所示，符号1和符号2上存在部分重叠子载波，类似的，符号2和符号3、符号3和符号4上也存在部分重叠子载波。后续，接收端在联合处理时，可以利用该部分重叠的子载波估计随机相位误差并补偿，以降低随机相位误差对测距精度的影响。
然而，在发送端采用多梳齿映射时，跳频重叠部分占用的等效带宽过大，导致每次跳频时实际增加的带宽(也可以称为有效带宽)变小，从而导致跳频次数增加，感知时延增大。
其中，多梳齿映射可以理解为非连续映射。例如，发送端采用4梳齿映射时，其可以选择的子载波为编号为0,4,8,12,16…或1,5,9,13,17…或2,6,10,14,18…或3,7,11,15,19…的子载波。采用多梳齿映射可以使得较短的感知序列占用较大的带宽；此外，还可以实现多个发送端采用不同的子载波以实现同一带宽的复用。特别的，连续映射也可以理解为1梳齿映射，或者说，1梳齿映射也可以理解为连续映射。
通常，跳频重叠区域包括的子载波数量越多，随机相位误差估计时信噪比越大，估计的随机相位误差越准确。因此，为了保证相位估计的准确性，通常要求跳频重叠区域包括一定数量的子载波。
示例性的，假设要求跳频重叠区域至少包括4个子载波，且一次跳频过程中感知信号的带宽为12个子载波，则如图4中的(a)所示，发送端采用1梳齿映射的情况下，一次跳频后实际增加的带宽为8个子载波的宽度。如图4中的(b)所示，发送端采用2梳齿映射的情况下，跳频重叠区域实际占用8个子载波，一次跳频后实际增加的带宽为4个子载波的宽度。从而，相比于1梳齿映射，每次跳频实际增加的带宽降低了一半，进而导致跳频次数增加，感知时延增大。
基于此，本申请提供一种信号发送方法，可以在跳频重叠区域采用较小的梳齿数映射，在非重叠区域采用较大的梳齿数映射，以降低跳频重叠区域占用的带宽，提高跳频实际增加的带宽，从而降低跳频次数和感知时延。
本申请实施例的技术方案可用于各种通信系统，该通信系统可以为第三代合作伙伴计划(3rd generation partnership project，3GPP)通信系统，例如，第五代(5th generation，5G)或者第六代(sixth generation，6G)移动通信系统、侧行链路(sidelink，SL)系统、超宽带(ultra-wideband，UWB)系统、车联网(vehicle to everything，V2X)系统，或者设备到设备(device-to-device，D2D)通信系统、机器到机器(machine to machine，M2M)通信系统、物联网(internet of things，IoT)，以及其他下一代通信系统。该通信系统也可以为非3GPP通信系统，例如Wi-Fi等无线局域网(wireless local area network，WLAN)系统，不予限制。
本申请实施例的技术方案可以应用于各种通信场景，例如可以应用于以下通信场景中的一种或多种：智能家居、D2D、V2X、和IoT等通信场景。
其中，上述适用本申请的通信系统和通信场景仅是举例说明，适用本申请的通信系统和通信场景不限于此，在此统一说明，以下不再赘述。
参见图5，为本申请实施例提供的一种通信系统。该通信系统包括第一通信设备和第二通信设备。
在一些实施例中，第一通信设备为信号发送端，第二通信设备为信号接收端。可选的，第一通信设备和第二通信设备可以为相同的通信设备，此时，可以理解为自发自收的感知场景。或者，第一通信设备和第二通信设备可以为不同的通信设备，此时，可以理解为自发他收的感知场景。
示例性的，在自发自收场景下，如图6中的(a)所示，第一通信设备可以为终端设备；或者，如图6中的(b)所示，第一通信设备可以为接入网设备。在自发他收场景下，如图6中的(c)所示，第一通信设备可以为终端设备，第二通信设备可以为接入网设备；或者，如图6中的(d)所示，第一通信设备可以为第一终端设备，第二通信设备可以为第二终端设备。
可选的，本申请并不限定第一通信设备一定为终端设备或接入网设备。第一通信设备也可以为其他类型的设备，例如核心网设备，不作具体限定。
可选的，除第一通信设备外，该通信系统还可以包括至少一个其他发送设备，该至少一个其他发送设备和第一通信设备可以进行梳分复用。示例性的，发送设备可以为终端设备，也可以为接入网设备。发送设备可以进行自发自收的感知，也可以进行自发他收的感知，本申请对此不作具体限定。
可选的，接入网设备指一种将终端设备接入到无线网络的设备，可以是长期演进(long term evolution，LTE)系统或演进的LTE系统(LTE-Advanced，LTE-A)中的演进型基站(evolutional Node B，eNB或eNodeB)，如传统的宏基站eNB和异构网络场景下的微基站eNB；或者可以是5G系统中的下一代节点B(next generation node B，gNodeB或gNB)；或者可以是传输接收点(transmission reception point，TRP)；或者可以是未来演进的公共陆地移动网络(public land mobile network，PLMN)中的基站；或者可以是宽 带网络业务网关(broadband network gateway，BNG)、汇聚交换机或非3GPP接入设备；或者可以是云无线接入网络(cloud radio access network，CRAN)中的无线控制器；或者可以是WiFi系统中的接入节点(access point，AP)；或者可以是无线中继节点或无线回传节点；或者可以是IoT中实现基站功能的设备、V2X中实现基站功能的设备、D2D中实现基站功能的设备、或者M2M中实现基站功能的设备，本申请实施例对此不作具体限定。
可选的，终端设备可以指一种具有无线收发功能的用户侧设备。终端设备也可以称为用户设备(user equipment，UE)、终端、接入终端、用户单元、用户站、移动站(mobile station，MS)、远方站、远程终端、移动终端(mobile terminal，MT)、用户终端、无线通信设备、用户代理或用户装置等。终端例如可以是IoT、V2X、D2D、M2M、5G网络、或者未来演进的PLMN中的无线终端。终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。
示例性的，终端设备可以是RedCap UE、窄带终端、无人机、IoT设备(例如，传感器，电表，水表等)、V2X设备、无线局域网(wireless local area networks，WLAN)中的站点(station，ST)、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备(也可以称为穿戴式智能设备)、平板电脑或带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、车载终端、具有车对车(vehicle-to-vehicle，V2V)通信能力的车辆、智能网联车、具有无人机对无人机(UAV to UAV，U2U)通信能力的无人机等等。终端可以是移动的，也可以是固定的，本申请对此不作具体限定。
本申请涉及的第一通信设备或第二通信设备的相关功能可以由一个设备实现，也可以由多个设备共同实现，还可以是由一个设备内的一个或多个功能模块实现，或者可以为一个或多个芯片，也可以为片上系统(system on chip，SOC)或芯片系统，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件，本申请实施例对此不作具体限定。
可以理解的是，上述功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行的软件功能，或者是硬件与软件的结合，或者是平台(例如，云平台)上实例化的虚拟化功能。
例如，本申请涉及的第一通信设备或第二通信设备的相关功能可以通过图7a中的通信装置700来实现。图7a所示为本申请实施例提供的通信装置700的结构示意图。该通信装置700包括一个或多个处理器701，以及至少一个通信接口704(图7a中仅是示例性的以包括通信接口704，以及一个处理器701为例进行说明)，可选的，还可以包括通信线路702和存储器703。
处理器701可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
在具体实现中，作为一种实施例，处理器701可以包括一个或多个CPU，例如图7a中的CPU0和CPU1。
在具体实现中，作为一种实施例，处理器701可以是一个单核(single-core)处理器，也可以是一个多核(multi-core)处理器。这里的处理器可以包括但不限于以下至少一种：中央处理单元(central processing unit，CPU)、微处理器、数字信号处理器(DSP)、微控制器(microcontroller unit，MCU)、或人工智能处理器等各类运行软件的计算设备，每种计算设备可包括一个或多个用于执行软件指令以进行运算或处理的核。
通信线路702可以用于通信装置700包括的不同组件之间的通信。
通信接口704，可以用于与其他设备或通信网络通信。所述通信接口704可以是收发器、收发机一类的装置，或者可以是输入输出接口。或者，所述通信接口704也可以是位于处理器701内的收发电路，用以实现处理器的信号输入和信号输出。
存储器703可以是具有存储功能的装置。例如可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其 他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路702与处理器相连接。存储器也可以和处理器集成在一起。
可选的，存储器703可以用于存储执行本申请方案的计算机执行指令，并由处理器701来控制执行，从而实现本申请实施例中提供的方法。
或者，可选的，本申请实施例中，也可以是处理器701执行本申请下述实施例提供的方法中的处理相关的功能，通信接口704负责本申请下述实施例提供的方法中的与其他设备或通信网络通信的功能，本申请实施例对此不作具体限定。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，通信装置700还可以包括输出设备705和输入设备706。输出设备705和处理器701通信，可以以多种方式来显示信息。例如，输出设备705可以是液晶显示器(liquid crystal display，LCD)，发光二极管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备706和处理器701通信，可以以多种方式接收用户的输入。例如，输入设备706可以是鼠标、键盘、触摸屏设备或传感设备等。
以通信接口704为收发器为例，如图7b所示，为本申请实施例提供的另一种通信装置700的结构示意图，该通信装置700包括处理器701和收发器704。图7b仅示出了通信装置700的主要部件。除处理器701和收发器704之外，所述通信装置还可以进一步包括存储器703、以及输入输出装置(图未示意)。
其中，处理器701主要用于对通信协议以及通信数据进行处理，以及对整个通信装置进行控制，执行软件程序，处理软件程序的数据。存储器703主要用于存储软件程序和数据。收发器704可以包括射频电路和天线，射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。
当通信装置开机后，处理器701可以读取存储器703中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器701对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到通信装置时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器701，处理器701将基带信号转换为数据并对该数据进行处理。
在另一种实现中，所述的射频电路和天线可以独立于进行基带处理的处理器而设置，例如在分布式场景中，射频电路和天线可以与独立于通信装置，呈拉远式的布置。
示例性的，如图7c所示，图7b中的处理器701可以包括数字信号处理器、信号发生器、和模数转换器。用于信号发送的射频电路可以包括上变频器和功率放大器，用于信号接收的射频电路可以包括下变频器和功率放大器。天线可以包括发射天线和接收天线。
作为一种可能的实现，信号发生器可以用于产生信号。上变频器和下变频器分别用于将信号调制到高频载波上，以及从高频载波上解调出信号。功率放大器用于将信号的功率放大。模数转换器用于转换数字信号和模拟信号。数字信号处理器用于产生感知序列并进行自相关和/或互相关运算。
需要说明的是，图7a或图7b或图7c中示出的组成结构并不构成对该通信装置的限定，除图7a或图7b或图7c所示部件之外，该通信装置可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
下面将结合附图，对本申请提供的方法进行展开说明。本申请实施例中，通信设备可以执行本申请实施例中的部分或全部步骤，这些步骤或操作仅是示例，本申请实施例还可以执行其它操作或者各种操作的变形。此外，各个步骤可以按照本申请实施例呈现的不同的顺序来执行，并且有可能并非要执行本申请实施例中的全部操作。
示例性的，本申请提供的信号发送方法可以应用于感知场景，或者可以应用于定位场景。当然，还可以应用于与感知或定位相关的场景，或者，感知或定位衍生的场景，本申请对应用场景不作具体限定。上述示例性的应用场景对本申请的方案也不造成任何限定。
如图8所示，为本申请提供的一种信号发送方法的流程示意图。参见图8，该信号发送方法包括如下步骤：
S801、第一通信设备生成第一信号。
可选的，第一信号可以用于感知，即第一信号也可以称为感知信号或感知参考信号，三者可以相互替换。当然，第一信号也可以为其他类型的信号，例如定位信号或通信信号，本申请对此不作具体限定。
可选的，第一信号可以基于至少一个序列生成。序列例如可以为ZC序列、m序列、Gold序列或格雷互补对(golay complementary pair，GCP)序列等。
示例性的，第一通信设备可以对至少一个序列进行离散傅里叶变换(discrete fourier transform，DFT)、快速傅里叶逆变换(inverse fast fourier transform，IFFT)、添加循环前缀(cyclic prefix，CP)等操作，得到第一信号。
S802、第一通信设备发送第一信号。相应的，第二通信设备接收信号。
其中，第一信号映射于N个时间单元各自的频域子带上。N为大于1的正整数。
可选的，时间单元可以是时隙、微时隙、符号、或者时域上的其他时间单位等。其中，符号可以为正交频分复用(orthogonal frequency division multiplexing，OFDM)符号、离散傅里叶变换扩展的正交频分复用(discrete fourier transform spread orthogonal frequency division multiplexing，DFT-s-OFDM)符号、单载波正交频分复用(single carrier，SC-OFDM)符号、或正交时频空(orthogonal time-frequency space，OTFS)符号。
可选的，N个时间单元在时域上可以是连续的，或者也可以是不连续，本申请对此不作具体限定。
可选的，每个时间单元的频域子带包括多个频域单元。示例性的，频域单元可以为资源元素(resource element，RE)或资源块(resource block，RB)。本申请下述实施例以频域单元为RE，即每个时间单元的频域子带包括多个RE为例进行说明。其中，RE也可以称为子载波，二者可以相互替换。
可选的，不同时间单元的频域子带包括的频域单元的数目可以相同也可以不相同，本申请对此不作具体限定。
其中，N个时间单元中每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域。示例性的，以N个时间单元中的某个时间单元为例，假设该时间单元的频域子带包括第一类频域区域和一个第二类频域区域，那么该时间单元的频域子带的结构可以如图9中的(a)所示。
可选的，该N个时间单元中的起始时间单元和末尾时间单元包括第一类频域区域和一个第二类频域区域，剩余N-2个时间单元包括第一类频域区域和多个第二类频域区域。
其中，N个时间单元中的第i个时间单元的频域子带中的至少一个第二类频域区域和第i+1个时间单元的频域子带中的至少一个第二类频域区域是重叠的。i为1至N-1的正整数。
示例性的，以N等于3为例，如图9中的(b)所示，时间单元1和时间单元3均包括第一类频域区域和一个第二类频域区域，时间单元2包括第一类频域区域和两个第二类频域区域。时间单元1的第二类频域区域和时间单元2的一个第二类频域区域重叠，时间单元3的第二类频域区域和时间单元2的另一个第二类频域区域重叠。
可选的，若第i+1个时间单元的频域子带包括多个第二类频域区域，第i个时间单元的频域区域包括一个第二类频域区域，则可以认为第i个时间单元的频域子带中的全部第二类频域区域和第i+1个时间单元的频域子带中的部分第二类频域区域部分重叠。示例性的，如图9中的(b)所示，时间单元1的频域子带中的第二类频域区域和时间单元2的频域子带中的部分第二类频域区域(即一个第二类频域区域)重叠。
可选的，N个时间单元中的第i个时间单元的频域子带和第i+2个时间单元的频域子带不存在重叠。示例性的，如图9中的(b)所示，时间单元1的频域子带和时间单元3的频域子带不重叠。
可选的，第i+1个时间单元的频域子带的最高频率大于第i个时间单元的最高频率。或者，第i+1个时间单元的频域子带的最低频率小于第i个时间单元的最低频率。
其中，第一信号以第一梳齿映射在第一类频域区域内，以第二梳齿映射在第二类频域区域内，第二梳齿小于第一梳齿。
也就是说，第一信号以较大的梳齿映射在第一类频域区域内，以较小的梳齿映射在第二类频域区域内。其中，梳齿也可以称为梳齿数。梳齿为大于或等于1的正整数。梳齿等于1时，也可以理解为连续映射。
示例性的，以N等于3，第一梳齿等于2，第二梳齿等于1为例，第一信号在3个时间单元内的映射位置可以如图10中的(a)所示。其中斜线填充部分表示第一信号的映射位置。
可选的，映射于第二类频域区域内的信号可以用于随机相位误差估计。
需要说明的是，本申请实施例中的第一类频域区域也可以称为非重叠区域或跳频非重叠区域，第二类频域区域也可以称为重叠区域或跳频重叠区域。
可选的，上述所描述的第一信号在N个时间单元及其频域子带上的映射方式可以理解为跳频。示例性 的，信号在第i个时间单元的频域子带和第i+1个时间单元的频域子带上的映射可以理解为一次跳频，即上述第一信号的跳频次数等于N-1。例如，图10中的(a)所示的实现中包括两次跳频。
可选的，基于序列生成第一信号的情况下，该第一信号可以是基于N个序列生成的。示例性的，N个序列中的第n个序列可以映射于N个时间单元中的第n个时间单元的频域子带，第一信号由映射在N个时间单元的频域子带上的N个序列生成，或者说，第一信号中映射于第n个时间单元的频域子带上的信号是根据第n个序列生成的。其中，该N个序列可以不完全相同，也可以完全相同(即一个序列重复映射N次)，本申请对此不作具体限定。其中，n为1至N的正整数。
或者，该第一信号可以是基于1个序列生成的。示例性的，可以将该1个序列划分为N个子序列，将N个子序列中的第n个子序列映射于N个时间单元中的第n个时间单元的频域子带，第一信号由映射在N个时间单元的频域子带上的N个子序列(或者说1个序列)生成，或者说，第一信号中映射于第n个时间单元的频域子带上的信号是根据某个序列的第n个子序列生成的。
其中，对于第二通信设备接收的信号，第二通信设备和第一通信设备为同一设备时，第二通信设备接收第二信号，该第二信号可以理解为第一信号的回波信号。第二通信设备和第一通信设备为不同设备时，第二通信设备接收第三信号，该第三信号可以理解为第一信号经过一个或多个目标反射后的信号。
可选的，第二通信设备接收到信号后，可以执行下述步骤S803。
S803、第二通信设备根据第一信号对接收到的信号进行处理。
其中，接收到的信号即第二信号或第三信号，可参考上述步骤S802中的相关说明，在此不再赘述。
可选的，第二通信设备可以对N个时间单元各自的频域子带上映射的信号进行联合处理，得到等效的带宽较大的接收信号(即第二信号或第三信号)，并对该等效的接收信号进行处理。
可选的，根据第一信号对接收到的信号进行处理可以包括：第二通信设备根据生成第一信号的序列(记为发送序列)对接收到的信号进行处理。
示例性的，第二通信设备可以对接收到的信号进行采样得到接收序列。之后对发送序列和接收序列进行相关运算，从而根据相关运算结果感知目标的距离、方位、速度等信息。
可选的，第二通信设备在进行联合处理时，还可以根据各个时间单元的第二类频域区域上传输的信号进行随机相位误差估计，并根据估计结果进行随机相位误差补偿。
基于上述方案，发送端在多个时间单元的频域子带上映射信号以实现跳频，使得接收端可以将多个时间单元的频域子带上映射的信号等效为带宽较大的接收信号，相比于在一个时间单元的频域子带上映射带宽较大的信号，可以降低对发送端ADC采样率的要求，也可以适配RedCap UE等设备的信号发送能力。此外，在各个时间单元的频域子带中的第一类频域区域内采用较大的梳齿进行映射，在重叠区域(即第二类频域区域)内采用较小的梳齿进行映射，相比于第一类频域区域和第二类频域区域采用相同的梳齿映射，能够降低重叠区域占用的带宽，提高跳频实际增加的带宽，从而降低跳频次数和业务(例如感知或定位)时延。
以上对本申请提供的信号发送方法的整体流程进行了说明，下面对上述方案中的一些可能实现方式进行相关说明。
可选的，上述N个时间单元的频域子带满足以下多项关系中的至少一项：
N个时间单元的频域子带属于同一载波；
N个时间单元的频域子带属于同一载波的同一带宽部分(bandwidth part，BWP)；
N个时间单元的频域子带属于同一载波的同一资源池；
N个时间单元的频域子带属于同一载波的相邻BWP；
N个时间单元的频域子带属于同一载波的相邻资源池；或者，
N个时间单元的频域子带属于带内载波聚合的不同载波。
可选的，在N个时间单元的频域子带属于同一载波的相邻BWP或相邻资源池的情况下，表示允许某个或某些时间单元的频域子带跨越至少两个相邻的BWP或资源池。同理，在N个时间单元的频域子带属于带内载波聚合的不同载波的情况下，表示允许某个或某些时间单元的频域子带跨越带内载波聚合的至少两个相邻载波。
示例性的，以N等于3，N个时间单元的频域子带属于同一载波的相邻BWP为例，如图11所示，时间单元1和时间单元3的频域子带分别位于BWP1和BWP2内，时间单元2的频域子带包括位于BWP1的部分子带和位于BWP2的部分子带。时间单元2的位于BWP1的部分频域子带与时间单元1的频域子带存在重叠的第二类频域区域，时间单元2的位于BWP2的部分频域子带与时间单元3的频域子带存在重 叠的第二类频域区域。
在一些实施场景下，可能存在多个发送端装置需要同时发送信号的情况，此时，可能存在如下两种发送方式：
方式一、不同发送端装置在不同的时间单元组的频域子带上发送信号。
其中，时间单元组包括多个时间单元。时间单元、时间单元的频域子带、以及信号的映射方式可参考上述步骤S801和步骤S802中的描述，在此不再赘述。
可选的，两个时间单元组不同可以理解为：两个时间单元组包括的时间单元在时域上不存在重叠。
示例性的，以第一通信设备为UE 1，两个发送端装置分别为UE 1和UE 2为例，UE 1对应时间单元组1(包括N1个时间单元)，UE 2对应时间单元组2(包括N2个时间单元)。即UE 1可以在时间单元组1包括的N1个时间单元的频域子带上发送信号1，UE 2可以在时间单元组2包括的N2个时间单元上发送信号2。
可选的，不同发送端装置对应的时间单元组所包括的时间单元的数量可以相同也可以不同。例如，上述N1和N2可以相同，也可以不同。此外，不同发送端装置对应的频域子带中第二类频域区域包括的频域单元的数量可以相同也可以不同。
作为第一种可能的实现，可以预配置或预定义资源池(例如感知资源池)对应的跳频次数、N的取值(即时间单元组包括的时间单元的数量)、或第二类频域区域包括的频域单元的数量。即，跳频次数、N的取值、或第二类频域区域包括的频域单元的数量可以为预设值。此时，共用同一资源池的多个发送端装置对应的时间单元组所包括的时间单元的数量相同，第二类频域区域包括的频域单元的数量也相同。
示例性的，以UE 1和UE 2分别对应的时间单元组1和时间单元2均包括3个时间单元，第二类频域区域均包括4个频域单元为例，如图10中的(b)所示，时间单元组1包括时间单元1、时间单元2、和时间单元3，时间单元组2包括时间单元4、时间单元5、和时间单元6。即UE 1在时间单元1、时间单元2、和时间单元3的频域子带上进行跳频以发送信号1，UE 2在时间单元4、时间单元5、和时间单元6的频域子带上进行跳频以发送信号2。
需要说明的是，图10中的(b)以UE 1和UE 2采用相同的第一梳齿和第二梳齿为例进行说明。当然，不同发送端装置也可以采用不同的第一梳齿和第二梳齿，本申请对此不作具体限定。
需要说明的是，图10中的(b)以时间单元6的频域子带的最低频率小于时间单元5的频域子带的最低频率、且时间单元5的频域子带的最低频率小于时间单元4的频域子带的最低频率为例进行说明。此外，时间单元6的频域子带的最高频率可以大于时间单元5的频域子带的最高频率，且时间单元5的频域子带的最高频率可以大于时间单元4的频域子带的最高频率，此时，信号2在时间单元4、时间单元5、以及时间单元6中的映射位置，分别与信号1在时间单元1、时间单元2、以及时间单元3中的映射位置相同。
作为第二种可能的实现，第二类频域区域包括的频域单元的数量可以由随机相位误差估计所需的信噪比(signal noise ratio，SNR)确定。
可选的，在自发自收场景下，不同发送端装置在跳频时可以根据自身进行随机相位误差估计时所需的SNR确定第二类频域区域包括的频域单元的数量。示例性的，第二类频域区域包括的频域单元的数量可以和所需的SNR正相关。例如，随机相位误差估计所需的SNR越大，第二类频域区域包括的频域单元的数量越多；随机相位误差估计所需的SNR越小，第二类频域区域包括的频域单元的数量越少。
示例性的，发送端装置可以根据所需的SNR确定第二类频域区域包括P的整数倍个频域单元。其中，P为大于或等于K的正整数，K为第一梳齿。
可选的，在自发他收场景下，接收端装置可以根据其进行随机相位误差估计时所需的SNR确定第二类频域区域包括的频域单元的数量。之后，可以向发送端装置指示该第二类频域区域包括的频域单元的数量。
基于该第二种可能的实现方式，可以根据实际需求灵活调整第二类频域区域包括的频域单元的数量，相比于第二类频域区域包括固定数量的频域单元，灵活性较高。此外，在进行随机相位误差估计时所需的SNR较低的情况下，第二类频域区域可以包括较少的频域单元，相比于第二类频域区域包括较多的固定数量的频域单元，可以进一步降低第二类频域区域占用的带宽，提高跳频实际增加的带宽，从而降低跳频次数和感知(或定位)时延。
方式二、不同发送端装置在相同的时间单元组的频域子带上通过梳分复用发送信号。
示例性的，以两个发送端装置分别为UE 1和UE 2，时间单元组包括时间单元1、时间单元2、时间单元3为例，UE 1和UE 2均在时间单元1、时间单元2、和时间单元3的频域子带上发送信号。
可选的，不同发送端装置可以在时间单元组的频域子带中的第一类频域区域内进行梳分复用。即，不同发送端装置采用相同的第一梳齿。其中，进行梳分复用的发送端装置的数量小于或等于第一梳齿。
可选的，对于第二类频域区域，第二梳齿大于1的情况下，不同发送端装置可以在第二类频域区域内进行梳分复用。在第二梳齿等于1的情况下，各个发送端装置的信号(或序列中的元素)可能均需要映射在第二类频域区域的每个频域单元，此时，各个发送端装置可以采用正交掩码(orthogonal cover code，OCC)调制原本需要映射在第二类区域的元素，以降低多个发送端装置之间的干扰。
示例性的，以两个发送端装置分别为UE 1和UE 2，UE1和UE2分别发送信号1和信号2，第一梳齿等于2，第二梳齿等于1为例，如图12中的(a)所示，UE 1和UE 2在时间单元1、时间单元2、和时间单元3的第一类频域区域内进行2梳齿梳分复用。在第二类频域区域内，UE 1和UE 2的信号均需映射在第二类频域区域的每个频域单元上，因此，UE 1和UE 2可以采用OCC码调制原本需要映射在第二类区域的元素。
可选的，以第一通信设备为多个发送端装置中的一个发送端装置(例如上述UE 1)为例，在第一信号中映射于N个时间单元中的第n个时间单元的频域子带上的信号是根据长度为M的序列(记为序列1)生成的情况下：
该序列1中，M1个元素可以映射在第n个时间单元的第一类频域区域内，剩余M-M1个元素映射在第n个时间单元的第二类频域区域内。其中，该剩余M-M1个元素可以根据基序列和长度为L的OCC码调制得到。n为1至N的正整数。M、M-M1、L为正整数。
需要说明的是，在n的取值不同时，相应的M、M1的取值可以不同。即时间单元组内不同时间单元的频域子带上映射的序列(或子序列)的长度可以不同。
作为一种可能的实现，基序列的长度可以为M-M1，即基序列可以包括M-M1个元素。序列1的上述M1个元素和基序列的M-M1个元素可以属于同一序列(记为序列2)。即，序列1由序列2的M1个元素、以及根据序列2的剩余M-M1个元素和OCC码调制后得到的M-M1个元素组成。
示例性的，以M等于14，M1等于10为例，假设序列2为[1,2,3,4,5,6,7,8,9,10,11,12,13,14]，那么序列1可以为[1,2,3,4,5,6,7,8,9,10,X1,X2,X3,X4]。其中，[X1,X2,X3,X4]可以理解为根据[11,12,13,14]和长度为L的OCC码调制得到的4个元素。
作为另一种可能的实现，基序列的长度可以为M-M1，即基序列可以包括M-M1个元素。序列1的上述M1个元素和基序列的M-M1个元素可以不属于同一序列。例如，序列1的上述M1个元素单独构成一个序列，基序列的M-M1个元素构成另外一个序列。
可选的，OCC码的长度L为大于或等于第一梳齿的正整数。示例性的，基于图12中的(a)所示的示例，OCC码的长度为大于或等于2的正整数。
可选的，第二类频域区域包括的频域单元的数量是L的正整数倍，即第二类频域区域包括的频域单元的数量大于或等于L。示例性的，基于图12中的(a)所示的示例，第二类频域区域包括4个频域单元，则OCC码的长度例如可以为2或4。
可选的，M-M1是L的正整数倍。即映射于第二类频域区域内的元素数量是OCC码的长度的正整数倍。
可选的，根据基序列和长度为L的OCC码调制得到序列1的剩余M-M1个元素，可以包括：采用长度为L的OCC码调制基序列得到序列1的剩余M-M1个元素。
示例性的，采用长度为L的OCC码调制基序列可以包括：按照OCC码的长度对基序列的元素进行分组得到至少一个元素组，之后，采用OCC码分别对每个元素组进行调制。以基序列包括M-M1个元素为例，可以将该M-M1个元素分为(M-M1)/L个元素组，每个元素组包括L个元素，即以L个元素为一组进行调制。
基于图12中的(a)所示的示例，以M-M1等于第二类频域区域包括的频域单元的数量4为例，若OCC码的长度L等于2，则如图13中的(a)所示，可以将长度为4的基序列分为2个元素组，采用长度为2的OCC码分别对2个元素组进行调制。若OCC码的长度L等于4，则如图13中的(b)所示，长度为4的基序列可以作为一个元素组，采用长度为4的OCC码对该元素组进行调制。
可选的，该方式二中，跳频次数、N的取值(即时间单元组包括的时间单元的数量)、或第二类频域区域包括的频域单元的数量可以是预配置或预定义的。或者，第二类频域区域包括的频域单元的数量可以由随机相位误差估计所需的SNR确定。可参考上述方式一中的相关说明，在此不再赘述。
可选的，上述梳分复用可以存在于多个时间单元组的频域子带上。示例性的，如图12中的(a)所示， 除UE 1和UE 2在时间单元组1(包括时间单元1、时间单元2、时间单元3)的频域子带上进行梳分复用外，另外两个发送端装置可以在时间单元组2(包括时间单元4、时间单元5、时间单元6)的频域子带上进行梳分复用，以分别发送信号3和信号4。其中，时间单元组2的频域子带上的梳分复用可参考上述梳分复用的相关说明，在此不再赘述。
需要说明的是，图12中的(a)以两个时间单元组对应的第一梳齿、第二梳齿、第二类频域区域包括的频域单元的数量、OCC码的长度相等为例进行说明。当然，不同时间单元组对应的第一梳齿、第二梳齿、第二类频域区域包括的频域单元的数量、OCC码的长度中的一项或多项也可以不同，本申请对此不作具体限定。
基于该方式二，不同发送端装置可以在同一时间单元组的频域子带上进行梳分复用，从而提高资源利用率。此外，采用OCC码调制映射于第二类频域区域的元素，可以降低第二类频域区域内各个发送端装置之间的干扰，从而降低各个发送端装置之间的干扰对随机相位误差估计的影响，提高随机相位误差估计的准确性。
可选的，在同一时间单元组的频域子带上进行梳分复用的多个发送端装置，其各自采用的第二类频域区域包括的频域单元的数量可以相同也可以不同。例如，图12中的(a)所示的示例中，UE 1和UE 2的第二类频域区域包括的频域单元的数量相同，均为4。
此外，UE 1和UE 2的第二类频域区域包括的频域单元的数量也可以不同。示例性的，如图12中的(b)所示，UE 1的第二类频域区域可以包括4个频域单元，即UE 1采用两次跳频间重叠的4个频域单元上的信号进行随机相位误差估计；UE 2的第二类频域区域可以包括2个频域单元，即UE 2采用两次跳频间重叠的2个频域单元上的信号进行随机相位误差估计。
可选的，各个发送端装置的第二类频域区域包括的频域单元的数量可以根据随机相位误差估计所需的SNR确定。基于图12中的(b)所示的示例，UE 2进行随机相位误差估计所需的SNR可能小于UE 1进行随机相位误误差估计所需的SNR。
可选的，在多个发送端装置各自的第二类频域区域内，各个发送端装置可以采用OCC码调制映射于第二类频域区域的元素，可参考上述OCC码调制的相关说明，在此不再赘述。
示例性的，基于图12中的(b)所示的示例，UE 1和UE 2均可以采用长度为2的OCC码调制映射在各自的第二类频域区域内的元素。
可选的，对于在同一时间单元组的频域子带上进行梳分复用的多个发送端装置，若某个发送端装置的第一类频域区域和另一发送端装置的第二类频域区域存在重叠，那么该发送端装置也可以采用OCC码调制映射在该重叠区域的元素。
示例性的，基于图12中的(b)所示的示例，时间单元1的频域单元21位于UE 1的第二类频域区域，且位于UE 2的第一类频域区域，那么，UE 2可以采用OCC码调制映射在该频域单元21上的UE 2的元素。
基于该方案，不同发送端装置可以在同一时间单元组的频域子带上进行梳分复用，从而提高资源利用率。此外，不同发送端装置可以根据实际需求灵活调整第二类频域区域包括的频域单元的数量，相比于第二类频域区域包括固定数量的频域单元，灵活性较高。
可以理解的是，以上各个实施例中，由第一通信设备实现的方法和/或步骤，也可以由可用于该第一通信设备的部件(例如处理器、芯片、芯片系统、电路、逻辑模块、或软件例如芯片或者电路)实现。由第二通信设备实现的方法和/或步骤，也可以由可用于该第二通信设备的部件(例如处理器、芯片、芯片系统、电路、逻辑模块、或软件例如芯片或者电路)实现。
上述主要对本申请提供的方案进行了介绍。相应的，本申请还提供了通信装置，该通信装置用于实现上述各种方法。该通信装置可以为上述方法实施例中的第一通信设备，或者包含上述第一通信设备的装置，或者为可用于第一通信设备的部件；或者，该通信装置可以为上述方法实施例中的第二通信设备，或者包含上述第二通信设备的装置，或者为可用于第二通信设备的部件。
可以理解的是，该通信装置为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法实施例对通信装置进行功能模块的划分，例如，可以对应各个功能划 分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
图14示出了一种通信装置140的结构示意图。该通信装置140包括处理模块1401和收发模块1402。该通信装置140可以用于实现上述第一通信设备或第二通信设备的功能。
在一些实施例中，该通信装置140还可以包括存储模块(图14中未示出)，用于存储程序指令和数据。
在一些实施例中，收发模块1402，也可以称为收发单元用以实现发送和/或接收功能。该收发模块1402可以由收发电路、收发机、收发器或者通信接口构成。
在一些实施例中，收发模块1402，可以包括接收模块和发送模块，分别用于执行上述方法实施例中由第一通信设备或第二通信设备执行的接收和发送类的步骤，和/或用于支持本文所描述的技术的其它过程；处理模块1401，可以用于执行上述方法实施例中由第一通信设备或第二通信设备执行的处理类(例如确定、生成等)的步骤，和/或用于支持本文所描述的技术的其它过程。
在该通信装置140用于实现上述第一通信设备的功能时：
处理模块1401，用于生成第一信号；收发模块1402，用于发送第一信号。
其中，第一信号映射于N个时间单元各自的频域子带上，每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域。第i个时间单元的频域子带中的至少一个第二类频域区域和第i+1个时间单元的频域子带中的至少一个第二类频域区域是重叠的，N为大于1的正整数，i为1至N-1的正整数。并且，第一信号以第一梳齿映射在第一类频域区域内，以第二梳齿映射在第二类频域区域内，第二梳齿小于第一梳齿。
可选的，收发模块1402，还用于接收第二信号，第二信号为第一信号的回波信号；处理模块1401，还用于根据第一信号对第二信号进行处理。
在该通信装置140用于实现上述第二通信设备的功能时：
收发模块1402，用于接收第三信号，第三信号是第一信号经过目标反射后的信号；处理模块1401，用于根据第一信号对第三信号进行处理。
其中，第一信号映射于N个时间单元各自的频域子带上，每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域；第i个时间单元的频域子带中的至少一个第二类频域区域和第i+1个时间单元的频域子带中的至少一个第二类频域区域是重叠的，N为大于1的正整数，i为1至N-1的正整数。并且，第一信号以第一梳齿映射在第一类频域区域内，以第二梳齿映射在第二类频域区域内，第二梳齿小于第一梳齿；
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本申请中，该通信装置140以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定专用集成电路(application-specific integrated circuit，ASIC)，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
作为一种可能的产品形态，本领域的技术人员可以想到该通信装置140可以采用图7a所示的通信装置700的形式。
作为一种示例，图14中的处理模块1401的功能/实现过程可以通过图7a所示的通信装置700中的处理器701调用存储器703中存储的计算机执行指令来实现，图14中的收发模块1402的功能/实现过程可以通过图7a所示的通信装置700中的通信接口704来实现。
作为另一种可能的产品形态，本申请实施例所述的通信装置，还可以使用下述来实现：一个或多个现场可编程门阵列(field programmable gate array，FPGA)、可编程逻辑器件(programmable logic device，PLD)、控制器、状态机、门逻辑、分立硬件部件、任何其它适合的电路、或者能够执行本申请通篇所描述的各种功能的电路的任意组合。
在一些实施例中，当图14中的通信装置140是芯片或芯片系统时，收发模块1402的功能/实现过程可以通过芯片或芯片系统的输入输出接口(或通信接口)实现，处理模块1401的功能/实现过程可以通过芯片或芯片系统的处理器(或者处理电路)实现。
由于本实施例提供的通信装置140可执行上述方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
在一些实施例中，本申请实施例还提供一种通信装置，该通信装置包括处理器，用于实现上述任一方 法实施例中的方法。
作为一种可能的实现方式，该通信装置还包括存储器。该存储器，用于保存必要的程序指令和数据，处理器可以调用存储器中存储的程序代码以指令该通信装置执行上述任一方法实施例中的方法。当然，存储器也可以不在该通信装置中。
作为另一种可能的实现方式，该通信装置还包括接口电路，该接口电路为代码/数据读写接口电路，该接口电路用于接收计算机执行指令(计算机执行指令存储在存储器中，可能直接从存储器读取，或可能经过其他器件)并传输至该处理器。
作为又一种可能的实现方式，该通信装置还包括通信接口，该通信接口用于与该通信装置之外的模块通信。
可以理解的是，该通信装置可以是芯片或芯片系统，该通信装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
本申请还提供了一种计算机可读存储介质，其上存储有计算机程序或指令，该计算机程序或指令被计算机执行时实现上述任一方法实施例的功能。
本申请还提供了一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例的功能。
本领域普通技术人员可以理解，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
可以理解，本申请中描述的系统、装置和方法也可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，即可以位于一个地方，或者也可以分布到多个网络单元上。作为单元显示的部件可以是或者也可以不是物理单元。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。本申请实施例中,计算机可以包括前面所述的装置。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (25)

  1. 一种信号发送方法，其特征在于，所述方法应用于第一通信设备，所述方法包括：
    生成第一信号；
    发送所述第一信号，所述第一信号映射于N个时间单元各自的频域子带上，每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域；第i个时间单元的频域子带中的至少一个所述第二类频域区域和第i+1个时间单元的频域子带中的至少一个所述第二类频域区域是重叠的，N为大于1的正整数，i为1至N-1的正整数；
    其中，所述第一信号以第一梳齿映射在所述第一类频域区域内，以第二梳齿映射在所述第二类频域区域内，所述第二梳齿小于所述第一梳齿。
  2. 根据权利要求1所述的方法，其特征在于，所述每个时间单元的频域子带包括多个频域单元；所述N个时间单元的频域子带满足以下多项关系中的至少一项：
    属于同一载波；
    属于同一载波的同一带宽部分BWP；
    属于同一载波的同一资源池；
    属于同一载波的相邻BWP；
    属于同一载波的相邻资源池；或者，
    属于带内载波聚合的不同载波。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一信号中映射于所述第i个时间单元的频域子带上的信号是根据长度为M的序列生成的；
    所述长度为M的序列中，M1个元素映射在所述第一类频域区域内，剩余M-M1个元素映射在所述第二类频域区域内；其中，所述M-M1个元素是根据基序列和长度为L的正交掩码调制得到的，L为正整数。
  4. 根据权利要求3所述的方法，其特征在于，所述第二类频域区域包括的频域单元的数量是L的正整数倍，和/或，M-M1是L的正整数倍。
  5. 根据权利要求3或4所述的方法，其特征在于，L为大于或等于所述第一梳齿的正整数。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述N的取值和/或所述第二类频域区域包括的频域单元的数量为预设值。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述第二类频域区域包括的频域单元的数量由随机相位误差估计所需的信噪比SNR确定。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述方法还包括：
    接收第二信号，所述第二信号为所述第一信号的回波信号；
    根据所述第一信号对所述第二信号进行处理。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，所述时间单元为符号，或者，所述时间单元为时隙。
  10. 根据权利要求1-9任一项所述的方法，其特征在于，所述第一通信设备为终端设备或接入网设备。
  11. 一种信号处理方法，其特征在于，所述方法应用于第二通信设备，所述方法包括：
    接收第三信号，所述第三信号是第一信号经过目标反射后的信号；所述第一信号映射于N个时间单元各自的频域子带上，每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域；第i个时间单元的频域子带中的至少一个所述第二类频域区域和第i+1个时间单元的频域子带中的至少一个所述第二类频域区域是重叠的，N为大于1的正整数，i为1至N-1的正整数；其中，所述第一信号以第一梳齿映射在所述第一类频域区域内，以第二梳齿映射在所述第二类频域区域内，所述第二梳齿小于所述第一梳齿；
    根据所述第一信号对所述第三信号进行处理。
  12. 一种通信装置，其特征在于，所述通信装置包括：处理模块和收发模块；
    所述处理模块，用于生成第一信号；
    所述收发模块，用于发送所述第一信号，所述第一信号映射于N个时间单元各自的频域子带上，每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域；第i个时间单元的频域子带中的至少一个所述第二类频域区域和第i+1个时间单元的频域子带中的至少一个所述第二类频域区域是重叠的，N为大于1的正整数，i为1至N-1的正整数；
    其中，所述第一信号以第一梳齿映射在所述第一类频域区域内，以第二梳齿映射在所述第二类频域区 域内，所述第二梳齿小于所述第一梳齿。
  13. 根据权利要求12所述的通信装置，其特征在于，所述每个时间单元的频域子带包括多个频域单元；所述N个时间单元的频域子带满足以下多项关系中的至少一项：
    属于同一载波；
    属于同一载波的同一带宽部分BWP；
    属于同一载波的同一资源池；
    属于同一载波的相邻BWP；
    属于同一载波的相邻资源池；或者，
    属于带内载波聚合的不同载波。
  14. 根据权利要求12或13所述的通信装置，其特征在于，所述第一信号中映射于所述第i个时间单元的频域子带上的信号是根据长度为M的序列生成的；
    所述长度为M的序列中，M1个元素映射在所述第一类频域区域内，剩余M-M1个元素映射在所述第二类频域区域内；其中，所述M-M1个元素是根据基序列和长度为L的正交掩码调制得到的，L为正整数。
  15. 根据权利要求14所述的通信装置，其特征在于，所述第二类频域区域包括的频域单元的数量是L的正整数倍，和/或，M-M1是L的正整数倍。
  16. 根据权利要求14或15所述的通信装置，其特征在于，L为大于或等于所述第一梳齿的正整数。
  17. 根据权利要求12-16任一项所述的通信装置，其特征在于，所述N的取值和/或所述第二类频域区域包括的频域单元的数量为预设值。
  18. 根据权利要求12-17任一项所述的通信装置，其特征在于，所述第二类频域区域包括的频域单元的数量由随机相位误差估计所需的信噪比SNR确定。
  19. 根据权利要求12-18任一项所述的通信装置，其特征在于，
    所述收发模块，还用于接收第二信号，所述第二信号为所述第一信号的回波信号；
    所述处理模块，还用于根据所述第一信号对所述第二信号进行处理。
  20. 根据权利要求12-19任一项所述的通信装置，其特征在于，所述时间单元为符号，或者，所述时间单元为时隙。
  21. 根据权利要求12-20任一项所述的通信装置，其特征在于，所述通信装置为终端设备或接入网设备。
  22. 一种通信装置，其特征在于，所述通信装置包括：处理模块和收发模块；
    所述收发模块，用于接收第三信号，所述第三信号是第一信号经过目标反射后的信号；所述第一信号映射于N个时间单元各自的频域子带上，每个时间单元的频域子带包括第一类频域区域和至少一个第二类频域区域；第i个时间单元的频域子带中的至少一个所述第二类频域区域和第i+1个时间单元的频域子带中的至少一个所述第二类频域区域是重叠的，N为大于1的正整数，i为1至N-1的正整数；其中，所述第一信号以第一梳齿映射在所述第一类频域区域内，以第二梳齿映射在所述第二类频域区域内，所述第二梳齿小于所述第一梳齿；
    所述处理模块，用于根据所述第一信号对所述第三信号进行处理。
  23. 一种通信装置，其特征在于，所述通信装置包括处理器；所述处理器，用于运行计算机程序或指令，以使所述通信装置执行如权利要求1-10任一项所述的方法，或者，以使所述通信装置执行如权利要求11所述的方法。
  24. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机指令或程序，当所述计算机指令或程序在计算机上运行时，使得如权利要求1-10任一项所述的方法被执行，或者，使得如权利要求11所述的方法被执行。
  25. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机指令；当部分或全部所述计算机指令在计算机上运行时，使得如权利要求1-10任一项所述的方法被执行，或者，使得如权利要求11所述的方法被执行。
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