WO2024087028A1 - 一种信道测量方法及装置 - Google Patents

一种信道测量方法及装置 Download PDF

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Publication number
WO2024087028A1
WO2024087028A1 PCT/CN2022/127438 CN2022127438W WO2024087028A1 WO 2024087028 A1 WO2024087028 A1 WO 2024087028A1 CN 2022127438 W CN2022127438 W CN 2022127438W WO 2024087028 A1 WO2024087028 A1 WO 2024087028A1
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Prior art keywords
csi
channel measurement
phase deviation
channel
information
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PCT/CN2022/127438
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English (en)
French (fr)
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刘瑶
刘乔
高宽栋
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华为技术有限公司
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Priority to PCT/CN2022/127438 priority Critical patent/WO2024087028A1/zh
Publication of WO2024087028A1 publication Critical patent/WO2024087028A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular to a channel measurement method and device.
  • one transmit/receive channel usually corresponds to multiple array elements (called channel elements), and the amplitude and phase (abbreviated as amplitude and phase) differences between the multiple elements are called the consistency error of the channel elements.
  • the consistency error not only affects the precise pointing of the phased array antenna beam in array signal processing, but also leads to the performance deterioration of technologies such as high-resolution spectrum estimation technology, super-resolution direction of arrival estimation technology, various adaptive beamforming algorithms, and nulling algorithms for multi-user interference avoidance.
  • the commonly used consistency error estimation method is a simple method based on time-sharing vector rotation.
  • the principle of the vector rotation method is: by adjusting the amplitude and/or phase of the transmitter weighting vector in time-sharing to perform multiple measurements, a joint solution is performed based on the multiple measurement results to estimate the consistency error.
  • phase deviation of the measured values is the same during multiple measurements.
  • factors such as the jitter or position movement of the device crystal oscillator will cause the phase deviation of the measured values of the same channel to be different at different times. Affected by the different phase deviations of the measured values at different times, the accuracy of the consistency error estimation will be greatly reduced.
  • the present application provides a channel measurement method and device, which can improve the accuracy of channel measurement.
  • a channel measurement method which can be executed by a terminal device, or by a component of the terminal device, such as a processor, chip, or chip system of the terminal device, or by a logic module or software that can realize all or part of the functions of the terminal device.
  • the method includes: receiving a first channel state information reference signal CSI-RS i from N first antenna ports of a network device, where i is a positive integer from 1 to N, and N is a positive integer greater than 1; receiving N second CSI-RS from a second antenna port of the network device.
  • the first CSI-RS i is used for channel measurement; and the N second CSI-RS are used to estimate the phase deviation.
  • Sending first information to the network device the first information indicates the result of the channel measurement corresponding to the first CSI-RS i, and the result of the channel measurement is determined based on the phase deviation and the measurement amount of the channel measurement.
  • the terminal device receives N second CSI-RS from the second antenna port of the network device to estimate the phase deviation, and receives the first CSI-RS i from the N first antenna ports of the network device to perform channel measurement. Since the result of the channel measurement corresponding to the first CSI-RS i is determined based on the phase deviation and the measurement amount, that is, the result of the channel measurement corresponding to the first CSI-RS i takes the phase deviation into account, the accuracy of the channel measurement result corresponding to the first CSI-RS i can be improved. Furthermore, in the consistency error estimation scenario, the impact of the phase deviation on the consistency error estimation can be reduced, and the accuracy of the consistency error estimation can be improved. In addition, the solution of the present application does not require additional hardware, and the phase deviation can be estimated by using the existing antenna port at the transmitting end, which has low complexity and can reduce the application cost.
  • the first CSI-RS i and the i-th second CSI-RS satisfy at least one of the following: the time domain position of the first CSI-RS i is the same as the time domain position of the i-th second CSI-RS; or, the frequency domain position of the first CSI-RS i is different from the frequency domain position of the i-th second CSI-RS.
  • the phase deviation of the channel measurement amount corresponding to the second CSI-RS can be approximated to the phase deviation of the channel measurement amount corresponding to the first CSI-RS, so that the channel measurement amount corresponding to the first CSI-RS can be phase compensated using the phase deviation estimated based on the second CSI-RS.
  • the method also includes: determining the phase deviation based on M channel measurement quantities corresponding to the M second CSI-RSs, where M is a positive integer less than or equal to N.
  • the phase deviation is determined according to M channel measurement quantities corresponding to M second CSI-RSs, including: determining the jth element of the phase deviation according to the channel measurement quantity corresponding to the jth second CSI-RS; or determining the jth element of the phase deviation according to the ratio of the channel measurement quantity corresponding to the jth second CSI-RS and the first value.
  • j is a positive integer from 1 to M
  • the M elements of the phase deviation are located on the main diagonal of the phase deviation matrix.
  • the first value is a channel measurement amount corresponding to the mth second CSI-RS, where m is a positive integer from 1 to M; or, the first value is a preset value.
  • phase deviation matrix D satisfies:
  • diag is used to construct a diagonal matrix
  • ⁇ is the phase deviation
  • angle is used to solve the phase angle
  • C represents the first value
  • the first information includes a phase deviation and a measurement value of the channel measurement.
  • the first information includes a phase deviation and a value obtained according to the measurement value of the channel measurement.
  • the first information includes a result of the channel measurement.
  • the method further includes: receiving second information from a network device.
  • the second information indicates that the terminal device estimates the phase deviation of the channel measurement quantities corresponding to the N first antenna ports based on the channel measurement quantity corresponding to the second antenna port; or, the second information indicates that the terminal device determines the results of the channel measurement corresponding to the N first antenna ports based on the channel measurement quantity corresponding to the second antenna port.
  • the second information from the network device can enable the terminal device to know the antenna port and CSI-RS used for phase deviation estimation, as well as the antenna port and CSI-RS used for channel measurement, so that the terminal device can correctly process the received CSI-RS to obtain the results of phase deviation and channel measurement.
  • receiving a first CSI-RS I from a network device through a first antenna port I includes: repeatedly receiving the first CSI-RS I K times through the first antenna port I, where I is a positive integer from 1 to N, and K is a positive integer.
  • Receiving an Ith second CSI-RS from a network device through a second antenna port includes: repeatedly receiving the Ith second CSI-RS K times through the second antenna port.
  • the repeated transmission of the first CSI-RS and the Ith second CSI-RS can enable the terminal device to determine the channel measurement amount based on the repeatedly received multiple CSI-RS, and reduce the noise of the channel measurement amount obtained based on a single reception, thereby improving the accuracy of the channel measurement amount.
  • the method also includes: receiving third information from a network device, the third information indicating the number of repetitions K of the first CSI-RS I.
  • the channel measurement amount corresponding to the first CSI-RS I is an average of the channel measurement amounts corresponding to the K-times-received first CSI-RS I.
  • the channel measurement amount corresponding to the I-th second CSI-RS is an average of the channel measurement amounts corresponding to the K-times-received I-th second CSI-RS.
  • the channel measurement result, the phase deviation, and the measurement quantity of the channel measurement satisfy:
  • D represents the phase deviation matrix
  • the elements in the phase deviation are located on the main diagonal of the phase deviation matrix
  • Y A represents the measurement value of the channel measurement
  • exp represents an exponential function with the natural constant e as the base.
  • sending first information to a network device includes: sending the first information to the network device according to a reporting period.
  • a channel measurement method which can be executed by a network device, or by a component of the network device, such as a processor, chip, or chip system of the network device, or by a logic module or software that can realize all or part of the functions of the network device.
  • the method includes: sending a first channel state information reference signal CSI-RS i to a terminal device through N first antenna ports, where i is a positive integer from 1 to N, and N is a positive integer greater than 1; sending N second CSI-RS to the terminal device through a second antenna port.
  • the first CSI-RS i is used for channel measurement
  • the N second CSI-RS are used to estimate the phase deviation.
  • Receive first information from the terminal device the first information indicates the result of the channel measurement corresponding to the first CSI-RS i, and the result of the channel measurement is determined based on the phase deviation and the measurement amount of the channel measurement.
  • the network device sends N second CSI-RS through the second antenna port for estimating the phase deviation, and the first CSI-RS i through the N first antenna ports for channel measurement. Since the result of the channel measurement corresponding to the first CSI-RS i is determined based on the phase deviation and the measurement amount, that is, the result of the channel measurement corresponding to the first CSI-RS i takes the phase deviation into account, the accuracy of the channel measurement result corresponding to the first CSI-RS i can be improved. Furthermore, in the consistency error estimation scenario, the impact of the phase deviation on the consistency error estimation can be reduced, and the accuracy of the consistency error estimation can be improved. In addition, the solution of the present application does not require additional hardware, and the phase deviation can be estimated by using the existing antenna ports at the transmitting end, which has low complexity and can reduce application costs.
  • the first CSI-RS i and the i-th second CSI-RS satisfy at least one of the following: the time domain position of the first CSI-RS i is the same as the time domain position of the i-th second CSI-RS; or, the frequency domain position of the first CSI-RS i is different from the frequency domain position of the i-th second CSI-RS.
  • the phase deviation is determined based on M channel measurement quantities corresponding to M second CSI-RSs, where M is a positive integer less than or equal to N.
  • the phase deviation includes M elements, and the M elements are located on the main diagonal of the phase deviation matrix.
  • the jth element is determined according to the channel measurement amount corresponding to the jth second CSI-RS; or, the jth element is determined according to the ratio of the channel measurement amount corresponding to the jth second CSI-RS to the first value; j is a positive integer from 1 to M.
  • the first value is a channel measurement amount corresponding to the mth second CSI-RS, where m is a positive integer from 1 to M; or, the first value is a preset value.
  • phase deviation matrix D satisfies:
  • diag is used to construct a diagonal matrix
  • ⁇ is the phase deviation
  • angle is used to solve the phase angle
  • C represents the first value
  • the first information includes a phase deviation and a measurement value of the channel measurement.
  • the first information includes a phase deviation and a value obtained according to the measurement value of the channel measurement.
  • the first information includes a result of the channel measurement.
  • the method also includes: sending second information to the terminal device, the second information instructing the terminal device to estimate the phase deviation of the channel measurement quantity corresponding to the N first antenna ports based on the channel measurement quantity corresponding to the second antenna port; or, the second information instructs the terminal device to determine the result of the channel measurement corresponding to the N first antenna ports based on the channel measurement quantity corresponding to the second antenna port.
  • sending a first CSI-RS I to a terminal device through a first antenna port I includes: repeatedly sending the first CSI-RS I to the terminal device through the first antenna port I for K times, where I is a positive integer from 1 to N, and K is a positive integer.
  • Sending an Ith second CSI-RS to the terminal device through a second antenna port includes: repeatedly sending an Ith second CSI-RS to the terminal device through the second antenna port for K times.
  • the method also includes: sending third information to the terminal device, the third information indicating the number of repetitions K of the first CSI-RS I.
  • the channel measurement result, the phase deviation, and the measurement quantity of the channel measurement satisfy:
  • D represents the phase deviation matrix
  • the elements in the phase deviation are located on the main diagonal of the phase deviation matrix
  • Y A represents the measurement value of the channel measurement
  • exp represents an exponential function with the natural constant e as the base.
  • the technical effects brought about by any possible design of the second aspect can refer to the technical effects brought about by the corresponding design in the above-mentioned first aspect, and will not be repeated here.
  • a communication device for implementing various methods.
  • the communication device may be the terminal device in the first aspect, or a device included in the terminal device, such as a chip or a chip system; or, the communication device may be the network device in the second aspect, or a device included in the network device, such as 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.
  • the communication device includes a module, unit, or means corresponding to the implementation method, which can be implemented by hardware, software, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the functions.
  • the communication device may include a processing module and a transceiver module.
  • 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 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 transceiver module includes a sending module and/or a receiving module, which are respectively used to implement the sending or receiving function in any of the above aspects and any possible implementation methods thereof.
  • 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 aspect.
  • the communication device can be the terminal device in the first aspect, or a device included in the terminal device, such as a chip or a chip system; or the communication device can be the network device in the second aspect, or a device included in the network device, such as a chip or a chip system.
  • the device is a chip system, it can be composed of a chip, or it can include a chip and other discrete devices.
  • a communication device comprising: at least one processor; the processor is used to execute a computer program or instruction stored in a memory so that the communication device executes the method described in any aspect.
  • the memory may be coupled to the processor, or the memory may exist independently of the processor, for example, the memory and the processor are two independent modules.
  • the memory may be located outside the communication device or inside the communication device.
  • the communication device may be the terminal device in the first aspect, or a device included in the terminal device, such as a chip or a chip system; or the communication device may be the network device in the second aspect, or a device included in the network device, such as a chip or a chip system. 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 in which a computer program or instruction is stored, and when the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any one of the 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 aspects.
  • the communication device provided in any one of the third to seventh aspects is a chip
  • the sending action/function of the communication device can be understood as output information
  • the receiving action/function of the communication device can be understood as input information
  • the technical effects brought about by any design method in the third to seventh aspects can refer to the technical effects brought about by different design methods in the first or second aspects, and will not be repeated here.
  • a communication system which includes the terminal device in the above aspect and the network device in the above aspect.
  • FIG1 is a schematic diagram of the structure of a communication system provided by the present application.
  • FIG2 is a schematic diagram of the structure of a communication device provided by the present application.
  • FIG3a is a schematic diagram of the effect of consistency error on output power provided by the present application.
  • FIG3b is a schematic diagram of the effect of consistency error on sidelobe energy provided by the present application.
  • FIG4 is a schematic diagram of a channel and channel array elements provided by the present application.
  • FIG5 is a flow chart of a channel measurement method provided by the present application.
  • FIG6 is a schematic diagram of the time-frequency position of a CSI-RS provided in the present application.
  • FIG7 is a schematic diagram of a channel grouping provided by the present application.
  • FIG8 is a schematic diagram showing the principle of a channel measurement method provided by the present application.
  • FIG9 is a schematic diagram of simulation results when phase offset compensation is performed and when phase offset compensation is not performed provided by the present application;
  • FIG10 is a schematic diagram of another time-frequency position of CSI-RS provided in the present application.
  • FIG11 is a schematic diagram of the structure of a network device and a terminal device provided by the present application.
  • FIG. 12 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application.
  • plural means two or more than two.
  • At least one of the following or similar expressions refers to any combination of these items, including any combination of single items or plural items.
  • at least one of a, b, or c can mean: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.
  • 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.
  • the technical solution provided in the present application can be used in various communication systems, which can be a 3rd generation partnership project (3GPP) communication system, for example, a 4th generation (4G) long term evolution (LTE) system, a 5th generation (5G) new radio (NR) system, a vehicle to everything (V2X) system, a system of LTE and NR hybrid networking, or a device-to-device (D2D) system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT), and other next generation communication systems.
  • 3GPP 3rd generation partnership project
  • 4G 4th generation
  • LTE long term evolution
  • 5G new radio
  • 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 without limitation.
  • the above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited to this. It is uniformly explained here and will not be repeated below.
  • the communication system includes a network device and at least one terminal device.
  • the terminal devices can communicate with each other.
  • 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 device may be 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 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 a smart phone with wireless transceiver function.
  • IoT device e.g., a sensor, an electric meter, a water meter, etc.
  • V2X device e.g., a V2X device
  • ST wireless local area network
  • WLAN wireless local area network
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital
  • Computers 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-to-vehicle (V2V) communication capabilities, intelligent networked vehicles, drones with UAV to UAV (U2U) communication capabilities, etc.
  • the terminal can be mobile or fixed, and this application does not make specific restrictions on this.
  • the terminal device in the embodiment of the present application may also be a base station-type device, but is used as a terminal device in the present application.
  • the network device is a device that connects a terminal device to a wireless network, and may be an evolutionary Node B (eNB or eNodeB) in an LTE or 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 (transmission reception point).
  • eNB or eNodeB LTE or evolved LTE system
  • LTE-A LTE-Advanced, LTE-A
  • a base station in a public land mobile network (PLMN) to be evolved in the future or a broadband network gateway (BNG), an aggregation switch or a non-3GPP access device; or a wireless controller in a cloud radio access network (CRAN); or an access point (AP) in a WiFi system; or a wireless relay node or a wireless backhaul node; or a device that implements a base station function in IoT, a device that implements a base station function in V2X, a device that implements a base station function in D2D, or a device that implements a base station function in M2M, and the embodiments of the present application do not make specific limitations on this.
  • the base stations in the embodiments of the present application may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, etc., and the embodiments of the present application do not specifically limit this.
  • a network device may refer to a centralized unit (CU) or a distributed unit (DU), or a network device may be composed of a CU and a DU.
  • the CU and the DU may be divided according to the protocol layer of the wireless network.
  • the functions of the radio resource control (RRC) protocol layer, the service data adaptation protocol (SDAP) layer, and the packet data convergence protocol (PDCP) layer are set in the CU, while the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer are set in the DU.
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • the CU may consist of a CU control plane (CU control plane, CU-CP) and a CU user plane (CU user plane, CU-UP).
  • CU control plane CU control plane, CU-CP
  • CU user plane CU-UP
  • the communication system shown in FIG. 1 is merely an example, and the communication system does not constitute any limitation on the solution of the present application, and the communication system to which the solution of the present application is applicable is not limited thereto.
  • the terminal device and the network device shown in FIG1 may adopt the composition structure shown in FIG2, or include the components shown in FIG2.
  • FIG2 is a schematic diagram of the composition of a communication device 200 provided in the present application, and the communication device 200 may be a terminal device or a chip or a system on chip in a terminal device; or, it may be a network device or a module or a chip or a system on chip in a network device.
  • the communication device 200 includes at least one processor 201 and at least one communication interface (FIG. 2 is merely an example of a communication interface 204 and a processor 201).
  • the communication device 200 may further include a communication bus 202 and a memory 203.
  • the processor 201 may be a general-purpose central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof.
  • the processor 201 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.
  • the communication bus 202 is used to connect different components in the communication device 200 so that the different components can communicate.
  • the communication bus 202 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in FIG. 2, but it does not mean that there is only one bus or one type of bus.
  • the communication interface 204 is used to communicate with other devices or communication networks.
  • the communication interface 204 can be a transceiver module, a transceiver circuit, a transceiver, or any device capable of implementing communication; or, the communication interface 204 can be an input/output interface located in the processor 201 to implement signal input and signal output of the processor.
  • the memory 203 may be a device with a storage function, used to store instructions and/or data, wherein the instructions may be computer programs.
  • the memory 203 may be a read-only memory (ROM) or other types of static storage devices that can store static information and/or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and/or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.
  • ROM read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • CD-ROM compact disc read-only memory
  • optical disc storage including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.
  • magnetic disk storage media or other magnetic storage devices etc., without limitation.
  • the memory 203 may exist independently of the processor 201, or may be integrated with the processor 201.
  • the memory 203 may be located inside the communication device 200, or may be located outside the communication device 200, without limitation.
  • the processor 201 can be used to process the communication protocol and communication data, as well as to control the entire communication device, execute the software program, and process the data of the software program.
  • the memory 203 can be used to store the software program and data.
  • the communication interface 204 is a transceiver, it can include a radio frequency circuit and an antenna.
  • the radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • the antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves.
  • the antenna can be a phased array antenna, which can include a multi-element antenna array.
  • the multi-element antenna array can be provided with a phase shifter or an antenna off switch.
  • the processor 201 can read the software program in the memory 203, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 201 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 201.
  • the processor 201 converts the baseband signal into data and processes the data.
  • the RF circuit and the antenna may be arranged independently of the processor that performs baseband processing.
  • the RF circuit and the antenna may be arranged independently of the communication device in a remote manner.
  • the communication device 200 may further include an output device 205 and an input device 206.
  • the output device 205 communicates with the processor 201 and may display information in a variety of ways.
  • the output device 205 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 206 communicates with the processor 201 and may receive user input in a variety of ways.
  • the input device 206 may be a mouse, a keyboard, a touch screen device, or a sensor device.
  • the structure shown in FIG2 does not constitute a specific limitation on the terminal device or network device.
  • the terminal device or network device may include more or fewer components than shown in the figure, or combine certain components, or split 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.
  • Channel array element It can also be called antenna array element or antenna array.
  • One channel can correspond to multiple channel array elements.
  • the receiving end receives the combined (or superimposed) value of the signals sent by the multiple channel array elements corresponding to the channel.
  • Channel array element consistency error refers to the amplitude and/or phase difference between different channel array elements.
  • the amplitude and phase of a channel array element can be understood as the change in amplitude and phase after the signal passes through the channel array element.
  • Antenna port is a logical concept.
  • An antenna port can correspond to one physical transmit antenna or multiple physical transmit antennas. In both cases, the receiver of the terminal device will not decompose the signal from the same antenna port. Because from the perspective of the terminal device, whether the channel is formed by a single physical transmit antenna or a combination of multiple physical transmit antennas, the reference signal (RS) corresponding to this antenna port defines this antenna port. The terminal device can perform channel estimation and data demodulation based on the reference signal corresponding to this antenna port.
  • the consistency error of the channel array element leads to a reduction in output power and a beam direction deviation.
  • the maximum energy of the side lobe is -20 dB.
  • the maximum energy of the side lobe increases to -10 dB, and in the case of a phase error, the maximum energy of the side lobe increases to about -8 dB, that is, the consistency error of the channel array element leads to an increase in the side lobe energy.
  • the commonly used estimation method is the vector rotation method.
  • the following is an example of a communication scenario with one transmitting channel (Tx) and one receiving channel (Rx) as shown in Figure 4, where both the transmitting channel and the receiving channel include N array elements, to introduce the commonly used vector rotation method.
  • the principle of the vector rotation method can be expressed by the following formula:
  • yi represents the measurement value determined by the receiving end at the i-th measurement.
  • xj can indicate the amplitude and phase value of the j-th channel array element, and the amplitude and phase value can be represented by a complex number.
  • [ mi1 , mi2 ,..., miN ] represents the vector rotation vector at the i-th measurement.
  • mij represents the vector rotation value of the j-th channel array element at the i-th measurement, and the vector rotation value is used to adjust the amplitude and/or phase of the channel array element.
  • i,j 1,2,...,N. Taking N equal to 4 as an example, a simple design of the matrix M can be:
  • the measurement value yi determined by the receiving end can be expressed as:
  • ⁇ represents the vector dot product, that is, the vector elements are multiplied one by one.
  • H Space represents the air interface channel.
  • the air interface channel can be expressed as:
  • AOA angle of arrival
  • AOD angle of depart
  • w T represent the weighted vectors (or analog weights) of the receiving and transmitting ends respectively.
  • the i-th element of is represented by
  • the j-th element of w T is denoted as w T,j .
  • mi represents the vector rotation vector at the i-th measurement
  • mi ,j represents the rotation vector value of the j-th channel array element at the transmitting end at the i-th measurement
  • mi,j is the j-th element of mi .
  • mi is a known quantity.
  • the measurement value yi determined by the receiver can be further expressed as:
  • ⁇ T,j represents the amplitude information of ⁇ T,j , that is, the amplitude information of the j-th channel array element at the transmitting end; represents the phase information of ⁇ T,j , that is, the phase information of the j-th channel array element at the transmitting end.
  • the phase information of is a known quantity.
  • a 0 and ⁇ 0 are mainly caused by the channel array element consistency error at the receiving end. Assuming that the spatial interface channel and the channel array element consistency error at the transmitting and receiving ends remain unchanged during multiple measurements, A 0 and ⁇ 0 can be regarded as constants.
  • a 0 and ⁇ 0 are constants, so the amplitude ratio between x j is equal to the amplitude ratio between ⁇ T,j , and the phase difference between x j is equal to The phase difference between them is equal.
  • the purpose of consistency error estimation is to obtain the amplitude ratio and phase difference between each channel array element, so the consistency error can be estimated by the above formula.
  • phase deviations of the measured values at multiple measurement moments are the same.
  • the phase deviations of the measured values at different times are different.
  • the amplitude of the crystal oscillator jitter will increase, making the phase deviations of the measured values at different times more obvious. Since one of the purposes of consistency error estimation is to measure the phase deviations between the array elements of each channel, the accuracy of consistency error estimation will be greatly reduced due to the influence of different phase deviations of the measured values at different times.
  • D represents the phase deviation matrix
  • D is a diagonal matrix
  • the values on the diagonal represent the phase deviations at different times.
  • D is an unknown quantity.
  • the present application provides a channel measurement method, which can estimate the phase deviation of the channel measurement quantity of N first antenna ports according to the channel measurement quantity corresponding to the second antenna port, so that the channel measurement quantity of the N first antenna ports can be phase compensated according to the phase deviation, thereby improving the accuracy of the channel measurement quantity of the first antenna port, and then reducing the influence of the phase deviation on the consistency error estimation, thereby improving the accuracy of the consistency error estimation.
  • the terminal device or the network 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 not to perform all the operations in the embodiment of the present application.
  • the method provided in the following embodiments of the present application can be applied to various time-sharing measurements and joint calculation processes, for example, it can be applied to the scenario of consistency error estimation.
  • this is only an exemplary description of the application scenario of the present application, and the application scenario does not impose any limitation on the present application.
  • the present application does not specifically limit the application scenario of the method provided below, for example, it can also be used in other scenarios involving time-sharing measurements and joint calculations.
  • a channel measurement method is provided in an embodiment of the present application, and the channel measurement method includes the following steps:
  • the network device sends a first channel state information reference signal (CSI-RS) i to the terminal device through N first antenna ports.
  • the terminal device receives the first CSI-RS i from the N antenna ports of the network device.
  • CSI-RS channel state information reference signal
  • the network device sends the first CSI-RS i to the terminal device through the N first antenna ports, which can be understood as: the network device sends the first CSI-RS 1 through the first antenna port 1, sends the first CSI-RS 2 through the first antenna port 2, sends the first CSI-RS 3 through the first antenna port 3, and so on, until the first CSI-RS N is sent through the first antenna port N.
  • the N first antenna ports are different from each other, and therefore, the first CSI-RS 1 to the first CSI-RS N are different from each other.
  • the time domain positions of the N first CSI-RS sent by the network device through the N first antenna ports are different, that is, the network device sends the first CSI-RS 1 to the first CSI-RS N at N measurement times respectively.
  • the network device can send the first CSI-RS 1 at time domain position 1, send the first CSI-RS 2 at time domain position 2, and so on, send the first CSI-RS N-1 at time domain position N-1, and send the first CSI-RS N at time domain position N.
  • the first CSI-RS i is used for channel measurement.
  • the channel measurement amount corresponding to the first CSI-RS i can be used for consistency error estimation.
  • the network device may adjust the amplitude and/or vector of the first CSI-RS i by the vector rotation vector Mi.
  • the vector rotation vectors corresponding to the first CSI-RS 1 to the first CSI-RS N are different from each other. Exemplarily, as shown in FIG6, the vector rotation vector corresponding to the first CSI-RS 1 is M1 , the vector rotation vector corresponding to the first CSI-RS 2 is M2 , and so on, the vector rotation vector corresponding to the first CSI-RS N-1 is MN -1 , and the vector rotation vector corresponding to the first CSI-RS N is MN .
  • the vector rotation vectors corresponding to the first CSI-RS 1 to the first CSI-RS N may form a vector rotation matrix.
  • Each vector rotation vector or vector rotation matrix may be pre-designed or protocol-defined, and this application does not specifically limit this.
  • the N first antenna ports are antenna ports corresponding to the first channel.
  • the first channel may be any transmission channel of the transmitting end (ie, the network device).
  • the terminal device may perform channel measurement based on the received first CSI-RS i to obtain a measurement value of the channel measurement corresponding to the first CSI-RS i.
  • the superscript A indicates that the measurement amount is the measurement amount corresponding to the first antenna port (or the first CSI-RS).
  • the measurement amount corresponding to the first CSI-RS 1 to the first CSI-RS N can be expressed as
  • the measurement quantity of the channel measurement may be understood as a channel estimation value, which may include phase information of the channel, and further, may also include amplitude information of the channel.
  • the network device sends N second CSI-RSs to the terminal device via the second antenna port.
  • the terminal device receives the N second CSI-RSs from the second antenna port of the network device.
  • the network device sends the second CSI-RS to the terminal device N times through the same antenna port (ie, the second antenna port).
  • the N second CSI-RS are used to estimate the phase deviation.
  • the phase deviation may be the phase deviation of the channel measurement quantity of the N first antenna ports. That is, the embodiment of the present application can estimate the phase deviation of the channel measurement quantity of the N first antenna ports through the CSI-RS sent by the second antenna port.
  • the time domain positions of the N second CSI-RSs sent by the network device through the second antenna port are different, that is, the network device sends the second CSI-RSs at N measurement times respectively.
  • the first CSI-RS i and the i-th second CSI-RS may satisfy at least one of the following (1) and (2):
  • the time domain position of the first CSI-RS i is the same as the time domain position of the i-th second CSI-RS. That is, as shown in FIG6 , the time domain position of the first CSI-RS 1 is the same as the first second CSI-RS, the time domain position of the first CSI-RS 2 is the same as the second second CSI-RS, and so on, the time domain position of the first CSI-RS N-1 is the same as the N-1-th second CSI-RS, and the time domain position of the first CSI-RS N is the same as the N-th second CSI-RS.
  • the frequency domain position of the first CSI-RS i is different from the frequency domain position of the i-th second CSI-RS. That is, as shown in FIG6 , the frequency domain position of the first CSI-RS 1 is different from the first second CSI-RS, the frequency domain position of the first CSI-RS 2 is different from the second second CSI-RS, and so on, the frequency domain position of the first CSI-RS N-1 is different from the N-1-th second CSI-RS, and the frequency domain position of the first CSI-RS N is different from the N-th second CSI-RS.
  • the network device may adjust the amplitude and/or vector of the i-th second CSI-RS through the vector rotation vector Ci .
  • the vector rotation vectors corresponding to the N second CSI-RSs are the same.
  • it can be considered that the change in the channel measurement amount corresponding to the N second CSI-RSs is only caused by the phase deviation, so that the phase deviation can be estimated through the N second CSI-RSs.
  • the vector rotation vectors corresponding to the N second CSI-RSs may form a vector rotation matrix.
  • the vector rotation matrix corresponding to the second antenna port may be an all-1 matrix.
  • the second antenna port is an antenna port corresponding to the second channel.
  • the second channel is a transmission channel of the transmitting end (ie, the network device) that is homologous to the first channel.
  • the second channel and the first channel being homologous can be understood as: the second channel and the first channel share a local oscillator, a reference clock, etc.
  • phase change value of the first channel at time t2 relative to time t1 is ⁇ 1
  • the phase change value of the second channel at time t2 relative to time t1 is ⁇ 2
  • the phase deviation of the first channel i.e., the phase deviation of the channel measurement quantity of the N first antenna ports
  • the network device may divide the Q channels of the network device into P groups according to the homology of the channels.
  • the channels in each channel group are homologous to each other.
  • the numbering (or indexing) of the channels in the pth group may be from q p-1 +1 to q p . That is, after the Q channels are divided into P groups, the numbering of each group and the numbering of the channels in each group may be as follows:
  • [1 2 ... Q] [1, 2, ..., q 1 , q 1 + 1 ... q 2 , ..., q P - 1 , q P - 1 + 1 ..., q P ]
  • the grouping of the Q channels may be as shown in FIG7 .
  • the first channel and the second channel may be two channels in any channel group.
  • first channel in the embodiment of the present application may also be referred to as a "channel to be tested”, and the "second channel” may also be referred to as an "auxiliary channel”.
  • first channel and the second channel may also have other names, which are not specifically limited in the present application.
  • the terminal device may perform channel measurement based on the received N second CSI-RSs to obtain a channel measurement value corresponding to the i-th second CSI-RS.
  • the superscript B indicates that the measurement quantity is the measurement quantity corresponding to the second antenna port (or the second CSI-RS).
  • the channel measurement quantity corresponding to N second CSI-RSs can be expressed as
  • the network device can also send N third CSI-RS through the third antenna port corresponding to the third channel.
  • the N third CSI-RS are also used to estimate the phase deviation.
  • the terminal device can receive the N third CSI-RS and perform channel measurement to obtain the channel measurement amount corresponding to the N third CSI-RS.
  • the relevant instructions of the second CSI-RS please refer to the relevant instructions of the second CSI-RS.
  • the network device may send configuration information to the terminal device, and the configuration information may be used to configure the CSI-RS, for example, including index information and position information of the first CSI-RS i and the second CSI-RS. Further, the configuration information may also be used to configure the value of N, etc.
  • the terminal device may receive the first CSI-RS i and N second CSI-RSs according to the configuration of the configuration information, and determine the corresponding channel measurement amount according to the CSI-RS.
  • the terminal device sends first information to the network device.
  • the network device receives the first information from the terminal device.
  • the first information indicates a result of a channel measurement corresponding to the first CSI-RS i.
  • the result of the channel measurement can be determined according to the phase deviation and the measurement amount of the channel measurement corresponding to the first CSI-RS i.
  • the phase deviation is obtained based on part or all of the second CSI-RSs among the N second CSI-RSs.
  • the result of the channel measurement corresponding to the first CSI-RS i can also be understood as the channel measurement amount after phase compensation is performed according to the phase deviation.
  • the first information may include a phase deviation and a measurement amount of a channel measurement corresponding to the first CSI-RS i.
  • the network device may determine a result of the channel measurement corresponding to the first CSI-RS i based on the phase deviation and the measurement amount, and the terminal device does not need to calculate the result of the channel measurement, thereby reducing the implementation complexity and power consumption of the terminal device.
  • the first information may include a phase deviation and a value obtained according to a measurement amount of a channel measurement corresponding to the first CSI-RS i.
  • the terminal device may perform noise reduction and other processing on the measurement amount of the channel measurement and carry it in the first information to send it to the network device.
  • the network device may determine the channel measurement result corresponding to the first CSI-RS i according to the phase deviation and the value obtained according to the measurement amount of the channel measurement, and the terminal device does not need to calculate the result of the channel measurement.
  • the first information may include a result of a channel measurement corresponding to the first CSI-RS i, that is, the terminal device feeds back a phase-compensated channel measurement amount to the network device. Based on this implementation, the amount of information reported by the terminal device can be reduced, thereby reducing resource overhead.
  • the specific parameters included in the first information may be pre-configured by the network device, or may be determined by the terminal device itself, and this application does not make any specific limitations on this.
  • the first information may be carried in a physical uplink shared channel (PUSCH), or the first information may be carried in uplink control information (UCI).
  • PUSCH physical uplink shared channel
  • UCI uplink control information
  • the network device may send the second information to the terminal device. Accordingly, the terminal device receives the second information from the network device.
  • the second information may be carried in the configuration information for configuring the CSI-RS, or may not be carried in the configuration information, which is not specifically limited in this application.
  • the second information indicates that the terminal device estimates the phase deviation of the channel measurement amount of the N first antenna ports according to the channel measurement amount corresponding to the second antenna port.
  • the second information indicates that the terminal device determines the channel measurement results corresponding to the N first antenna ports according to the channel measurement amount corresponding to the second antenna port.
  • the second information indicates that the channel measurement amount corresponding to the second antenna port is used for phase deviation estimation of the channel measurement amount corresponding to the N first antenna ports.
  • the second information indicates that the N first antenna ports are used for channel measurement and the second antenna port is used for phase deviation estimation.
  • phase deviation design in the embodiment of the present application is only an application form of the channel measurement of the second antenna port, and other forms may also be used.
  • the measurement of the reference signal on the second antenna port (or the channel measurement of the second antenna port) is used for the channel measurement of the first antenna port.
  • the present application is not limited to using only the channel measurement of the second antenna port for the phase deviation estimation of the first antenna port, and other estimates obtained based on the channel measurement of the second antenna port can also be used for the channel measurement of the first antenna port.
  • the channel measurement amount corresponding to the antenna port can be understood as: the channel measurement amount corresponding to the CSI-RS sent through the antenna port.
  • the channel measurement results corresponding to the N first antenna ports can be understood as: the channel measurement results corresponding to the first CSI-RS i sent through the N first antenna ports.
  • the second information may include the index of the N first antenna ports and the index of the second antenna port.
  • the index of the second antenna port may be carried in the configuration information of the N first antenna ports.
  • the second information may include the index of the first CSI-RS i and the index of the second CSI-RS.
  • the index of the second CSI-RS may be carried in the configuration information of the first CSI-RS i.
  • the index of the second CSI-RS may be located in a specific field in the configuration information of the first CSI-RS i, and the specific field may indicate the CSI-RS used for the channel measurement corresponding to the first CSI-RS i, or indicate the antenna port used for the channel measurement of the first antenna port. Therefore, when the specific field carries the index of the second CSI-RS, it may indicate that the channel measurement corresponding to the second CSI-RS may be used for the channel measurement corresponding to the first CSI-RS i, or it may indicate that the channel measurement of the second antenna port is used for the channel measurement of the first antenna port.
  • the purpose of the second CSI-RS may also be carried in the configuration information of the first CSI-RS i.
  • the configuration information also indicates that the channel measurement corresponding to the second CSI-RS is used for the channel measurement corresponding to the first CSI-RS i, or also indicates that the channel measurement of the second antenna port is used for the channel measurement of the first antenna port.
  • the second information may include an index of the first channel and an index of the second channel.
  • the index of the second channel may be carried in the configuration information of the first channel.
  • the terminal device may determine the N first antenna ports and the second antenna ports based on the correspondence between the channel and the antenna port.
  • the second information may include an index of the first channel and channel grouping information, where the channel grouping information indicates the channel grouping situation, for example, indicating the channels included in a certain channel group.
  • the terminal device can determine the channel group where the first channel is located according to the index of the first channel, thereby determining the other channels in the channel group except the first channel as auxiliary channels. Accordingly, the network device sends CSI-RS for phase deviation estimation through the antenna ports corresponding to the other channels in the channel group except the first channel.
  • the second information may be carried in a radio resource control (RRC) message, or downlink control information (DCI), or a media access control-control element (MAC-CE).
  • RRC radio resource control
  • DCI downlink control information
  • MAC-CE media access control-control element
  • the second information may also be carried in other messages, for example, the second information may also be carried in system information, such as a system information block (SIB), and this application does not specifically limit this.
  • SIB system information block
  • the terminal device may determine the phase deviation based on M channel measurement amounts corresponding to the M second CSI-RSs, where M is a positive integer less than or equal to N. That is, the terminal device may determine the phase deviation based on the channel measurement amounts corresponding to some or all of the above-mentioned N second CSI-RSs.
  • the channel measurement amount corresponding to the CSI-RS can be understood as the channel measurement amount obtained according to the CSI-RS.
  • the terminal device may perform the determination of the phase deviation according to the indication of the above-mentioned second information.
  • the M second CSI-RSs may be the first M second CSI-RSs with the strongest signal quality among the N second CSI-RSs.
  • Signal quality may be represented by reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), etc.
  • the phase deviation may include M elements, and the M elements are located on the main diagonal of the phase deviation matrix.
  • the phase deviation matrix is a diagonal matrix.
  • the terminal device may determine the jth element of the phase deviation according to the channel measurement amount corresponding to the jth second CSI-RS among the above-mentioned M second CSI-RSs.
  • j is a positive integer from 1 to M, that is, the terminal device may determine the first element of the phase deviation according to the channel measurement amount corresponding to the 1st second CSI-RS, determine the second element of the phase deviation according to the channel measurement amount corresponding to the 2nd second CSI-RS, and so on, determine the Mth element of the phase deviation according to the channel measurement amount corresponding to the Mth second CSI-RS.
  • the phase deviation and the channel measurement amount corresponding to the N second CSI-RSs may satisfy the following relationship:
  • ⁇ is the phase deviation
  • angle is used to solve the phase angle.
  • the terminal device may determine the jth element of the phase deviation based on the channel measurement amount corresponding to the jth second CSI-RS among the above-mentioned M second CSI-RSs and the first numerical value.
  • j is a positive integer from 1 to M, that is, the terminal device may determine the first element of the phase deviation based on the channel measurement amount corresponding to the 1st second CSI-RS and the first numerical value, determine the second element of the phase deviation based on the channel measurement amount corresponding to the 2nd second CSI-RS and the first numerical value, and so on, determine the Mth element of the phase deviation based on the channel measurement amount corresponding to the Mth second CSI-RS and the first numerical value.
  • the first value may be a channel measurement amount corresponding to a second CSI-RS among the M second CSI-RSs, that is, the first value is a channel measurement amount corresponding to the mth second CSI-RS, where m is a positive integer from 1 to M.
  • the first value may be a preset value, for example, the value of the first value may be equal to 1.
  • the value of the first value may also be other values, which is not specifically limited in the present application.
  • the phase deviation and the channel measurement amount corresponding to the N second CSI-RSs may satisfy the following relationship:
  • ⁇ is the phase deviation
  • angle is used to solve the phase angle.
  • C represents the first value.
  • the terminal device can also determine the phase deviation according to the channel measurement amount corresponding to the M third CSI-RS. Afterwards, the phase deviation determined according to the channel measurement amount corresponding to the M second CSI-RS and the phase deviation determined according to the channel measurement amount corresponding to the M third CSI-RS are used to obtain the final phase deviation. For example, the average value, maximum value or minimum value of the two is taken to obtain the final phase deviation.
  • phase deviation ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • diag is used to construct a diagonal matrix.
  • the terminal device can determine the result of the channel measurement corresponding to the first CSI-RS i based on the phase deviation and the measurement value of the channel measurement corresponding to the first CSI-RS i.
  • the result of the channel measurement corresponding to the first CSI-RS i, the phase deviation, and the measurement amount of the channel measurement corresponding to the first CSI-RS i may satisfy the following formula (1):
  • D represents the phase deviation matrix.
  • Y A represents the measurement value of the channel measurement.
  • Y A may also be replaced by a value obtained according to Y A.
  • the terminal device may perform noise reduction and other processing on Y A , and use the processed result to determine the result of the channel measurement.
  • exp represents an exponential function with the natural constant e as the base.
  • exp(D) represents the transformation of each element in the phase deviation matrix D into an exponential form with e as the base.
  • exp(D) is written as Representation Matrix The inverse matrix of .
  • ⁇ represents the nth element of the phase deviation ⁇ .
  • the network device after the network device obtains the channel measurement result corresponding to the first CSI-RS i, it can perform consistency error estimation.
  • M -1 represents the inverse matrix of matrix M. Since M is a known quantity, M -1 is also a known quantity. Further, According to the process shown in Fig. 5, the network device can estimate X, thereby estimating the consistency error of the channel array element of the first channel. Further, after obtaining the consistency error, the network device can compensate for the consistency error of the channel array element.
  • the channel measurement result can also have other uses, and the network device can flexibly use the channel measurement result according to actual needs, and this application does not make specific limitations on this.
  • the network device sends N second CSI- RSs through the second antenna port for measurement to estimate the phase deviation.
  • the first CSI-RS i is sent through the N first antenna ports for channel measurement.
  • the channel measurement amount corresponding to the first antenna port is compensated by the estimated phase deviation to obtain the result of the channel measurement corresponding to the first antenna port, that is, the compensated channel measurement amount. Since the result of the channel measurement corresponding to the first CSI-RS i takes the phase deviation into account, the accuracy of the channel measurement result corresponding to the first CSI-RS i can be improved.
  • the influence of phase deviation on the consistency error estimation can be reduced, and the accuracy of the consistency error estimation can be improved.
  • the accuracy of the consistency error estimation can be improved by nearly 3 dB at most compared to the solution without phase deviation compensation.
  • the estimation accuracy of the solution of the present application can be improved by more than 5dB.
  • the solution of the present application does not require additional hardware, and the phase deviation can be estimated by using the antenna port corresponding to the existing channel at the transmitting end. It has low complexity and can reduce application costs.
  • the network device may repeatedly send certain first CSI-RS. For example, the network device may repeatedly send the first CSI-RS I to the terminal device through the first antenna port I for K times, where I is a positive integer from 1 to N and K is a positive integer. Accordingly, the terminal device repeatedly receives the first CSI-RS I through the first antenna port I for K times.
  • the channel measurement quantity corresponding to the first CSI-RS I is the average value of the channel measurement quantities corresponding to the first CSI-RS I received K times repeatedly, or the maximum or minimum value thereof.
  • the network device repeatedly sends the first CSI-RS 2 three times, which are respectively recorded as the first CSI-RS 21, the first CSI-RS 22, and the first CSI-RS 23.
  • the channel measurement value corresponding to the first CSI-RS 2 is It can be the channel measurement value corresponding to the first CSI-RS 21 Channel measurement value corresponding to the first CSI-RS 22 Channel measurement value corresponding to the first CSI-RS 23 The average value of the three, or the maximum or minimum value of the three.
  • the network device when the network device repeatedly sends the first CSI-RS I K times, it can also send the Ith second CSI-RS K times to the terminal device through the second antenna port.
  • the channel measurement amount corresponding to the Ith second CSI-RS in this scenario may be an average value of the channel measurement amounts corresponding to the Ith second CSI-RS received repeatedly K times, or a maximum value or a minimum value thereof.
  • the network device repeatedly sends the second CSI-RS three times. That is, the network device actually sends N+K-1 second CSI-RSs through the second antenna port.
  • the channel measurement value corresponding to the second CSI-RS is It can be the channel measurement value corresponding to the second CSI-RS 21 Channel measurement value corresponding to the second CSI-RS 22 Channel measurement quantity corresponding to the second CSI-RS 23 The average value of the three, or the maximum or minimum value of the three.
  • the terminal device can determine the channel measurement amount according to the repeatedly received multiple CSI-RS, and reduce the noise of the channel measurement amount obtained according to a single reception, thereby improving the accuracy of the channel measurement amount.
  • the network device may send third information to the terminal device. Accordingly, the terminal device receives the third information from the network device.
  • the third information indicates the number of repetitions K of the first CSI-RS I.
  • the third information may be carried in the information used to configure the first CSI-RS I.
  • the third information may include the index and repetition number K of the first CSI-RS I, or the third information may include the index and repetition number K of the first antenna port I sending the first CSI-RS I.
  • the third information may include a repetition number K.
  • each first CSI-RS i is repeatedly sent K times by default.
  • the third information may include an index I and a repetition number K, indicating that the I-th first CSI-RS (i.e., the first CSI-RS I) is repeated K times. In other words, it indicates that the I-th first CSI-RS to the (I+K-1)-th first CSI-RS are the same CSI-RS.
  • the process shown in Figure 5 above can be understood as a round of measurement process to obtain a phase deviation and a channel measurement result.
  • the network device and the terminal device perform multiple rounds of measurement, and obtain a phase deviation and channel measurement result in each round of measurement.
  • the terminal device may send the first information to the network device according to the reporting period. That is, the terminal device periodically indicates the channel measurement result to the network device.
  • the terminal device may indicate the channel measurement result of the last round of measurement within the reporting period to the network device; or, the terminal device may determine the final channel measurement result based on the channel measurement results of the multiple rounds of measurements and indicate it to the network device.
  • the reporting period may be configured by the network device, for example, the network device may configure the reporting period in the measurement configuration of the CSI-RS, or may be customized by the terminal device, or may be predefined by the protocol, and this application does not make any specific limitation on this.
  • the terminal device may indicate the channel measurement result to the network device based on an event trigger, that is, when a trigger event occurs, the terminal device indicates the channel measurement result to the network device.
  • the trigger event may be, for example, that the phase deviation is greater than a first threshold, the channel measurement amount corresponding to the first antenna port is greater than a second threshold, etc.
  • the trigger event, the first threshold, and the second threshold may be configured by the network device, or may be customized by the terminal device, or may be predefined by the protocol, and this application does not make any specific limitations on this.
  • the network device may perform consistency error estimation based on the measurement feedback result of the terminal device, and execute the method shown in Figure 5 when the estimated consistency error is greater than a threshold.
  • the network device may also execute the method shown in Figure 5 when there are special requirements, such as the need to obtain more accurate channel measurement results. That is, the execution of the method shown in Figure 5 may be triggered by the consistency error being greater than a threshold, or by special requirements of the network device. Of course, it may also be triggered by other events, which is not specifically limited in this application.
  • CSI-RS may also be replaced by other types of reference signals.
  • the methods and/or steps implemented by the network device can also be implemented by components that can be used for the network device (such as a processor, chip, chip system, circuit, logic module, or software such as a chip or circuit); the methods and/or steps implemented by the terminal device can also be implemented by components that can be used for the terminal device (such as a processor, chip, chip system, circuit, logic module, or software such as a chip or circuit).
  • 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 a network device in the above method embodiment, or a device including the above network device, or a component that can be used for a network device, such as a chip or a chip system; or, the communication device can be a terminal device in the above method embodiment, or a device including the above terminal device, or a component that can be used for a terminal device, such as a chip or a chip system.
  • the communication device includes hardware structures and/or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, 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 the present application.
  • the embodiment of the present application can divide the functional modules of the communication device according to the above method embodiment.
  • each functional module can be divided according to each function, or two or more functions can be integrated into one processing module.
  • the above integrated module 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.
  • the network device may include a pilot generation module, a transmission signal processing module, a transmission port control module, and a multi-element antenna array. Furthermore, the network device may also include a consistency error estimation module and a consistency error compensation module.
  • the pilot generation module is used to generate a first CSI-RS i and a second CSI-RS.
  • the transmission signal processing module is used to implement baseband processing such as encoding and modulation of the signal to obtain a baseband signal, and modulate the baseband signal into a radio frequency signal.
  • the multi-element antenna array may include a phase adjustment unit for completing the transmission of the first CSI-RS i and the second CSI-RS.
  • the transmission port control module can be used to control the switching of the antenna port so that the network device can send the first CSI-RS i through different first antenna ports at different measurement times, and send the second CSI-RS through the same second antenna port.
  • the transmission port control module can control the switching of the antenna port by controlling the phase adjustment unit of the multi-element antenna array or the antenna shutdown switch.
  • the consistency error estimation module is used to determine the result of the channel measurement corresponding to the first CSI-RS i according to the first information reported by the terminal device, so as to estimate the consistency error.
  • the consistency error compensation module is used to compensate for the consistency error of the channel array element.
  • the terminal device may include a receiving antenna, a receiving signal processing module, a channel estimation module, and a phase deviation estimation module. Furthermore, the terminal device may also include a phase deviation compensation module.
  • the receiving antenna is used to receive a radio frequency signal.
  • the receiving signal processing module is used to implement down-conversion and baseband signal recovery.
  • the channel estimation module is used to determine the channel measurement quantity.
  • the phase deviation estimation module is used to estimate the phase deviation based on the channel measurement quantities corresponding to the N second CSI-RSs.
  • the phase deviation compensation module is used to determine the result of the channel measurement corresponding to the first CSI-RS i, or in other words, to compensate the channel measurement quantity corresponding to the first CSI-RS i according to the phase deviation.
  • the communication device 120 includes a processing module 1201 and a transceiver module 1202.
  • the communication device 120 can be used to implement the functions of the above-mentioned network device or terminal device.
  • the communication device 120 may further include a storage module (not shown in FIG. 12 ) for storing program instructions and data.
  • the transceiver module 1202 may also be referred to as a transceiver unit for implementing a sending and/or receiving function.
  • the transceiver module 1202 may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.
  • the transceiver module 1202 may include a receiving module and a sending module, which are respectively used to execute the receiving and sending steps performed by the network device or terminal device in the above-mentioned method embodiment, and/or used to support other processes of the technology described in this document; the processing module 1201 may be used to execute the processing steps (such as determination, generation, etc.) performed by the network device or terminal device in the above-mentioned method embodiment, and/or used to support other processes of the technology described in this document.
  • the processing module 1201 may be used to execute the processing steps (such as determination, generation, etc.) performed by the network device or terminal device in the above-mentioned method embodiment, and/or used to support other processes of the technology described in this document.
  • the transceiver module 1202 is used to receive a first channel state information reference signal CSI-RS i from N first antenna ports of the network device, where i is a positive integer from 1 to N, and N is a positive integer greater than 1, and the first CSI-RS i is used for channel measurement; the transceiver module 1202 is also used to receive N second CSI-RS from the second antenna port of the network device, and the N second CSI-RS are used to estimate the phase deviation; the transceiver module 1202 is also used to send first information to the network device, where the first information indicates a result of the channel measurement, and the result of the channel measurement is determined based on the phase deviation and a measurement amount of the channel measurement.
  • CSI-RS i channel state information reference signal
  • the processing module 1201 is configured to determine a phase deviation according to M channel measurement quantities corresponding to M second CSI-RSs, where M is a positive integer less than or equal to N.
  • the processing module 1201 is specifically used to determine the jth element of the phase deviation based on the channel measurement amount corresponding to the jth second CSI-RS; or, to determine the jth element of the phase deviation based on the ratio of the channel measurement amount corresponding to the jth second CSI-RS and the first numerical value; wherein j is a positive integer from 1 to M, and the M elements of the phase deviation are located on the main diagonal of the phase deviation matrix.
  • the transceiver module 1202 is also used to receive second information from the network device, the second information indicating that the terminal device estimates the phase deviation of the channel measurement quantity corresponding to the N first antenna ports based on the channel measurement quantity corresponding to the second antenna port; or, the second information indicates that the terminal device determines the result of the channel measurement corresponding to the N first antenna ports based on the channel measurement quantity corresponding to the second antenna port.
  • the transceiver module 1202 is used to receive a first CSI-RS I from a network device through a first antenna port I, including: the transceiver module 1202 is used to repeatedly receive the first CSI-RS I through the first antenna port I for K times, where I is a positive integer from 1 to N, and K is a positive integer.
  • the transceiver module 1202 is used to receive an Ith second CSI-RS from a network device through the second antenna port, including: the transceiver module 1202 is used to repeatedly receive the Ith second CSI-RS through the second antenna port for K times.
  • the transceiver module 1202 is also used to receive third information from the network device, where the third information indicates the number of repetitions K of the first CSI-RS I.
  • the transceiver module 1202 is used to send the first information to the network device, including: the transceiver module 1202 is used to send the first information to the network device according to the reporting period.
  • the transceiver module 1202 is used to send a first channel state information reference signal CSI-RS i to the terminal device through N first antenna ports, where i is a positive integer from 1 to N, and N is a positive integer greater than 1, and the first CSI-RS i is used for channel measurement; the transceiver module 1202 is also used to send N second CSI-RS to the terminal device through the second antenna port, and the N second CSI-RS are used to estimate the phase deviation; the transceiver module 1202 is also used to receive first information from the terminal device, the first information indicates a result of the channel measurement, and the result of the channel measurement is determined based on the phase deviation and the measurement amount of the channel measurement.
  • CSI-RS i channel state information reference signal
  • the transceiver module 1202 is also used to send second information to the terminal device, the second information instructing the terminal device to estimate the phase deviation of the channel measurement quantity corresponding to the N first antenna ports based on the channel measurement quantity corresponding to the second antenna port; or, the second information instructs the terminal device to determine the result of the channel measurement corresponding to the N first antenna ports based on the channel measurement quantity corresponding to the second antenna port.
  • the transceiver module 1202 is specifically used to repeatedly send the first CSI-RS I to the terminal device through the first antenna port I for K times, where I is a positive integer from 1 to N, and K is a positive integer; the transceiver module 1202 is specifically used to repeatedly send the Ith second CSI-RS to the terminal device through the second antenna port for K times.
  • the transceiver module 1202 is also used to send third information to the terminal device, where the third information indicates the number of repetitions K of the first CSI-RS I.
  • the communication device 120 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 120 may take the form of the communication device 200 shown in FIG. 2 .
  • the function/implementation process of the processing module 1201 in FIG12 can be implemented by the processor 201 in the communication device 200 shown in FIG2 calling the computer execution instructions stored in the memory 203.
  • the function/implementation process of the transceiver module 1202 in FIG12 can be implemented by the communication interface 204 in the communication device 200 shown in FIG2.
  • the function/implementation process of the transceiver module 1202 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 1201 can be implemented through the processor (or processing circuit) of the chip or the chip system.
  • the communication device 120 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 network device or terminal device described in the embodiments of the present application can 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
  • controllers state machines
  • gate logic discrete hardware components
  • discrete hardware components any other suitable circuits, or any combination of circuits that can perform the various functions described throughout the present application.
  • an embodiment of the present application further provides a communication device, which includes a processor for implementing a method in any of the above method embodiments.
  • the communication device further includes a memory.
  • the memory is used to store necessary computer programs and data.
  • the computer program may include instructions, and the processor may call the instructions in the computer program 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 above embodiments it can be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes (or functions) described in the embodiments of the present application are implemented.
  • 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, for example, 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

一种信道测量方法及装置，能够提高信道测量的精度，从而降低相位偏差对一致性误差估计的影响，提高一致性误差估计的精度。该方法包括：网络设备通过N个第一天线端口向终端设备发送第一CSI-RS 1至第一CSI-RS N，以及，通过第二天线端口向终端设备发送N个第二CSI-RS。终端设备接收来自N个第一天线端口的第一CSI-RS 1至第一CSI-RS N，得到该第一CSI-RS对应的信道测量的测量量，以及，接收来自第二天线端口的N个第二CSI-RS，以估计相位偏差。终端设备向网络设备发送第一信息，该第一信息指示第一CSI-RS对应的信道测量的结果，该信道测量的结果是根据相位偏差和该信道测量的测量量确定。其中，N为正整数。

Description

一种信道测量方法及装置 技术领域
本申请实施例涉及通信领域，尤其涉及一种信道测量方法及装置。
背景技术
相控阵天线系统中，一个收/发通道通常对应多个阵元(称为通道阵元)，该多个阵元中各个阵元之间的幅度和相位(简称幅相)差称为通道阵元的一致性误差。一致性误差不仅影响阵列信号处理中相控阵天线波束的精确指向，还会导致高分辨谱估计技术、超分辨波达方向估计技术、各类自适应波束形成算法、用于多用户干扰避让的零陷算法等技术的性能恶化。
为了满足上述技术对通道阵元幅相一致性的要求，需要对通道阵元的一致性误差进行监测和校正，其本质即为对通道阵元的一致性误差的精确测量或估计。目前常用的一致性误差估计方法是一种简单的基于分时矢量旋转的方法。矢量旋转法的原理为：通过分时调整发送端加权向量的幅度和/或相位进行多次测量，基于多次测量结果进行联合求解，估计一致性误差。
在目前的矢量旋转方案中，通常假设多次测量时测量值的相位偏差是相同的。但是实际应用中，设备晶振的抖动或位置移动等因素，会导致同一通道的测量值的相位偏差在不同时刻不同。受不同时刻测量值的不同相位偏差的影响，一致性误差估计的精度将大幅降低。
发明内容
本申请提供一种信道测量方法及装置，能够提高信道测量的精度。
第一方面，提供了一种信道测量方法，该方法可以由终端设备执行，也可以由终端设备的部件，例如终端设备的处理器、芯片、或芯片系统等执行，还可以由能实现全部或部分终端设备功能的逻辑模块或软件实现。该方法包括：接收来自网络设备的N个第一天线端口的第一信道状态信息参考信号CSI-RS i，i为从1至N的正整数，N为大于1的正整数；接收来自网络设备的第二天线端口的N个第二CSI-RS。其中，第一CSI-RS i用于信道测量；N个第二CSI-RS用于估计相位偏差。向网络设备发送第一信息，第一信息指示第一CSI-RS i对应的信道测量的结果，该信道测量的结果是根据相位偏差和信道测量的测量量确定。
基于该方案，终端设备接收来自网络设备的第二天线端口的N个第二CSI-RS，以估计相位偏差，以及接收来自网络设备的N个第一天线端口的第一CSI-RS i，以进行信道测量。由于第一CSI-RS i对应的信道测量的结果是根据相位偏差和测量量确定，即第一CSI-RS i对应的信道测量的结果考虑了相位偏差，因此能够提高第一CSI-RS i对应的信道测量结果的精度。进一步的，在一致性误差估计场景中，可以降低相位偏差对一致性误差估计的影响，提高一致性误差估计的精度。此外，本申请的方案无需额外增加硬件，利用发送端已有的天线端口即可估计相位偏差，复杂度较低，可以降低应用成本。
在一种可能的设计中，第一CSI-RS i和第i个第二CSI-RS满足如下至少一项：第一CSI-RS i的时域位置和第i个第二CSI-RS的时域位置相同；或者，第一CSI-RS i的频域位置和第i个第二CSI-RS的频域位置不同。
基于该可能的设计，在第一CSI-RS i的时域位置和第i个第二CSI-RS的时域位置相同的情况下，第二CSI-RS对应的信道测量量的相位偏差可以近似于第一CSI-RS对应的信道测量量的相位偏差，从而可以使用基于第二CSI-RS估计的相位偏差对第一CSI-RS对应的信道测 量量进行相位补偿。
在一种可能的设计中，该方法还包括：根据M个第二CSI-RS对应的M个信道测量量确定相位偏差，M为小于或等于N的正整数。
在一种可能的设计中，根据M个第二CSI-RS对应的M个信道测量量确定相位偏差，包括：根据第j个第二CSI-RS对应的信道测量量确定相位偏差的第j个元素；或者，根据第j个第二CSI-RS对应的信道测量量和第一数值的比值确定相位偏差的第j个元素。其中，j是从1至M的正整数，相位偏差的M个元素位于相位偏差矩阵的主对角线上。
在一种可能的设计中，第一数值为第m个第二CSI-RS对应的信道测量量，m为1至M中的一个正整数；或者，第一数值为预设值。
在一种可能的设计中，相位偏差矩阵D满足：
D＝diag(Δθ)
Figure PCTCN2022127438-appb-000001
或者，
Figure PCTCN2022127438-appb-000002
其中，diag用于构造对角矩阵，Δθ为相位偏差，angle用于求解相位角；
Figure PCTCN2022127438-appb-000003
表示第j个第二CSI-RS对应的信道测量量；C表示第一数值。
在一种可能的设计中，第一信息包括相位偏差和信道测量的测量量。或者，第一信息包括相位偏差和根据信道测量的测量量得到的值。或者，第一信息包括信道测量的结果。
在一种可能的设计中，该方法还包括：接收来自网络设备的第二信息。第二信息指示终端设备根据第二天线端口对应的信道测量量估计N个第一天线端口对应的信道测量量的相位偏差；或者，第二信息指示终端设备根据第二天线端口对应的信道测量量确定N个第一天线端口对应的信道测量的结果。
基于该可能的设计，来自网络设备的第二信息能够使得终端设备获知用于相位偏差估计的天线端口和CSI-RS，以及用于信道测量的天线端口和CSI-RS，以便终端设备能够对接收到的CSI-RS进行正确处理，从而得到相位偏差和信道测量的结果。
在一种可能的设计中，通过第一天线端口I接收来自网络设备的第一CSI-RS I，包括：通过第一天线端口I重复接收K次第一CSI-RS I，I为1至N中的正整数，K为正整数。通过第二天线端口接收来自网络设备的第I个第二CSI-RS，包括：通过第二天线端口重复接收K次第I个第二CSI-RS。
基于该可能的设计，第一CSI-RS和第I个第二CSI-RS的重复发送，可以使得终端设备根据重复接收的多次CSI-RS确定信道测量量，对根据单次接收得到的信道测量量进行降噪，从而提高信道测量量的精度。
在一种可能的设计中，该方法还包括：接收来自网络设备的第三信息，第三信息指示第一CSI-RS I的重复次数K。
在一种可能的设计中，第一CSI-RS I对应的信道测量量为重复接收的K次第一CSI-RS I对应的信道测量量的平均值。第I个第二CSI-RS对应的信道测量量为重复接收的K次第I个第二CSI-RS对应的信道测量量的平均值。
在一种可能的设计中，信道测量的结果、相位偏差、信道测量的测量量满足：
Figure PCTCN2022127438-appb-000004
其中，
Figure PCTCN2022127438-appb-000005
表示信道测量的结果，D表示相位偏差矩阵，相位偏差中的元素位于相位偏差矩阵的主对角线上，Y A表示信道测量的测量量，exp表示以自然常数e为底的指数函数。
在一种可能的设计中，向网络设备发送第一信息，包括：根据上报周期向网络设备发送第一信息。
第二方面，提供了一种信道测量方法，该方法可以由网络设备执行，也可以由网络设备的部件，例如网络设备的处理器、芯片、或芯片系统等执行，还可以由能实现全部或部分网络设备功能的逻辑模块或软件实现。该方法包括：通过N个第一天线端口向终端设备发送第一信道状态信息参考信号CSI-RS i，i为从1至N的正整数，N为大于1的正整数；通过第二天线端口向终端设备发送N个第二CSI-RS。其中，第一CSI-RS i用于信道测量，N个第二CSI-RS用于估计相位偏差。接收来自终端设备的第一信息，第一信息指示第一CSI-RS i对应的信道测量的结果，信道测量的结果是根据相位偏差和信道测量的测量量确定。
基于该方案，网络设备通过第二天线端口发送N个第二CSI-RS，用于估计相位偏差，以及通过N个第一天线端口的第一CSI-RS i，用于进行信道测量。由于第一CSI-RS i对应的信道测量的结果是根据相位偏差和测量量确定，即第一CSI-RS i对应的信道测量的结果考虑了相位偏差，因此能够提高第一CSI-RS i对应的信道测量结果的精度。进一步的，在一致性误差估计场景中，可以降低相位偏差对一致性误差估计的影响，提高一致性误差估计的精度。此外，本申请的方案无需额外增加硬件，利用发送端已有的天线端口即可估计相位偏差，复杂度较低，可以降低应用成本。
在一种可能的设计中，第一CSI-RS i和第i个第二CSI-RS满足如下至少一项：第一CSI-RS i的时域位置和第i个第二CSI-RS的时域位置相同；或者，第一CSI-RS i的频域位置和第i个第二CSI-RS的频域位置不同。
在一种可能的设计中，相位偏差根据M个第二CSI-RS对应的M个信道测量量确定，M为小于或等于N的正整数。
在一种可能的设计中，相位偏差包括M个元素，M个元素位于相位偏差矩阵的主对角线上。其中，第j个元素根据第j个第二CSI-RS对应的信道测量量确定；或者，第j个元素根据第j个第二CSI-RS对应的信道测量量和第一数值的比值确定；j是从1至M的正整数。
在一种可能的设计中，第一数值为第m个第二CSI-RS对应的信道测量量，m为1至M中的一个正整数；或者，第一数值为预设值。
在一种可能的设计中，相位偏差矩阵D满足：
D＝diag(Δθ)
Figure PCTCN2022127438-appb-000006
或者，
Figure PCTCN2022127438-appb-000007
其中，diag用于构造对角矩阵，Δθ为相位偏差，angle用于求解相位角；
Figure PCTCN2022127438-appb-000008
表示第j个第二CSI-RS对应的信道测量量；C表示第一数值。
在一种可能的设计中，第一信息包括相位偏差和信道测量的测量量。或者，第一信息包括相位偏差和根据信道测量的测量量得到的值。或者，第一信息包括信道测量的结果。
在一种可能的设计中，该方法还包括：向终端设备发送第二信息，第二信息指示终端设备根据第二天线端口对应的信道测量量估计N个第一天线端口对应的信道测量量的相位偏差；或者，第二信息指示终端设备根据第二天线端口对应的信道测量量确定N个第一天线端口对应的信道测量的结果。
在一种可能的设计中，通过第一天线端口I向终端设备发送第一CSI-RS I包括：通过第一天线端口I向终端设备重复发送K次第一CSI-RS I，I为1至N中的正整数，K为正整数。通过第二天线端口向终端设备发送第I个第二CSI-RS，包括：通过第二天线端口向终端设备重复发送K次第I个第二CSI-RS。
在一种可能的设计中，该方法还包括：向终端设备发送第三信息，第三信息指示第一CSI-RS I的重复次数K。
在一种可能的设计中，信道测量的结果、相位偏差、信道测量的测量量满足：
Figure PCTCN2022127438-appb-000009
其中，
Figure PCTCN2022127438-appb-000010
表示信道测量的结果，D表示相位偏差矩阵，相位偏差中的元素位于相位偏差矩阵的主对角线上，Y A表示信道测量的测量量，exp表示以自然常数e为底的指数函数。
其中，第二方面的任一种可能的设计所带来的技术效果可参考上述第一方面中的相应设计所带来的技术效果，在此不再赘述。
第三方面，提供了一种通信装置用于实现各种方法。该通信装置可以为第一方面中的终端设备，或者终端设备中包含的装置，比如芯片或芯片系统；或者，所述通信装置可以为第二方面中的网络设备，或者网络设备中包含的装置，比如芯片或芯片系统。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。
所述通信装置包括实现方法相应的模块、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括收发模块。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。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。
在一些可能的设计中，收发模块包括发送模块和/或接收模块，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或接收功能。
第四方面，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任一方面所述的方法。该通信装置可以为第一方面中的终端设备，或者终端设备中包含的装置，比如芯片或芯片系统；或者，所述通信装置可以为第二方面中的网络设备，或者网络设备中包含的装置，比如芯片或芯片系统。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。
第五方面，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存储器中存储的计算机程序或指令，以使该通信装置执行任一方面所述的方法。该存储器可以与处理器耦合，或者，该存储器也可以独立于处理器存在，例如，存储器和处理器为两个独立的模块。该存储器可以位于所述通信装置之外，也可以位于所述通信装置之内。该通信装置可以为第一方面中的终端设备，或者终端设备中包含的装置，比如芯片或芯片系统；或者，所述通信装置可以为第二方面中的网络设备，或者网络设备中包含的装置，比如芯片或芯片系统。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。
第六方面，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计算机程序或指令，当其在通信装置上运行时，使得通信装置可以执行任一方面所述的方法。
第七方面，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任一方面所述的方法。
可以理解的是，第三方面至第七方面中任一方面提供的通信装置是芯片时，通信装置的发送动作/功能可以理解为输出信息，通信装置的接收动作/功能可以理解为输入信息。
其中，第三方面至第七方面中任一种设计方式所带来的技术效果可参见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。
第八方面，提供了一种通信系统，该通信系统包括上述方面中的终端设备和上述方面中 的网络设备。
附图说明
图1为本申请提供的一种通信系统的结构示意图；
图2为本申请提供的一种通信装置的结构示意图；
图3a为本申请提供的一种一致性误差对输出功率的影响示意图；
图3b为本申请提供的一种一致性误差对旁瓣能量的影响示意图；
图4为本申请提供的一种通道及通道阵元的示意图；
图5为本申请提供的一种信道测量方法的流程示意图；
图6为本申请提供的一种CSI-RS的时频位置示意图；
图7为本申请提供的一种通道分组的示意图；
图8为本申请提供的一种信道测量方法的原理示意图；
图9为本申请提供的一种进行相偏补偿时和未进行相偏补偿时的仿真结果示意图；
图10为本申请提供的另一种CSI-RS的时频位置示意图；
图11为本申请提供的一种网络设备和终端设备的结构示意图；
图12为本申请实施例提供的另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，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。
本申请提供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，第四代(4th generation，4G)长期演进(long term evolution，LTE)系统、第五代(5th generation，5G)新无线(new radio，NR)系统、车联网(vehicle to everything，V2X)系统、LTE和NR混合组网的系统、或者设备到设备(device-to-device，D2D)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等。或者，该通信系统也可以为非3GPP通信系统，不予限制。
其中，上述适用本申请的通信系统仅是举例说明，适用本申请的通信系统不限于此，在此统一说明，以下不再赘述。
示例性的，参见图1，为本申请提供的一种本申请方案适用的通信系统。该通信系统包括网络设备和至少一个终端设备。可选的，终端设备之间可以相互通信。
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。终端设备可以是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。
可选的，本申请实施例中的终端设备还可以是基站形态的设备，只是在本申请中被用作终端设备的角色。
可选的，网络设备是一种将终端设备接入到无线网络的设备，可以是LTE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。
示例性的，本申请实施例中的基站可以包括各种形式的基站，例如：宏基站，微基站(也称为小站)，中继站，接入点等，本申请实施例对此不作具体限定。
可选的，在具体实现时，网络设备可以指集中单元(central unit，CU)或分布式单元(distributed unit，DU)，或者，网络设备可以是CU和DU组成的。CU和DU可以根据无线网络的协议层划分。例如，无线资源控制(radio resource control，RRC)协议层、业务数据适配协议(service data adaptation protocol,SDAP)层以及分组数据汇聚协议(packet data convergence protocol，PDCP)层的功能设置在CU中，而无线链路控制(radio link control，RLC)层，媒体接入控制(media access control，MAC)层，物理(physical，PHY)层的功能设置在DU中。
可以理解，对CU和DU处理功能按照这种协议层的划分仅仅是一种举例，也可以按照其他的方式进行划分，本申请对此不作具体限定。
在一些实施例中，CU可以由CU控制面(CU control plane，CU-CP)和CU用户面(CU user plane，CU-UP)组成。
其中，上述图1所示的通信系统仅是举例说明，该通信系统对本申请的方案不构成任何限定，本申请的方案适用的通信系统也不限于此。
可选的，具体实现时，图1所示的终端设备和网络设备可以采用图2所示的组成结构，或者包括图2所示的部件。图2为本申请提供的一种通信装置200的组成示意图，该通信装置200可以为终端设备或者终端设备中的芯片或者片上系统；或者，可以为网络设备或者网络设备中的模块或芯片或片上系统。
如图2所示，该通信装置200包括至少一个处理器201，以及至少一个通信接口(图2中仅是示例性的以包括一个通信接口204，以及一个处理器201为例进行说明)。可选的，该通信装置200还可以包括通信总线202和存储器203。
处理器201可以是一个通用中央处理器(central processing unit，CPU)、通用处理器、网络处理器(network processor，NP)、数字信号处理器(digital signal processing，DSP)、微处理器、微控制器、可编程逻辑器件(programmable logic device，PLD)或它们的任意组合。处理器201还可以是其它具有处理功能的装置，例如电路、器件或软件模块，不予限制。
通信总线202用于连接通信装置200中的不同组件，使得不同组件可以通信。通信总线202可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。该总线可以分为地址总线、数据总线、控制总线等。为便于表示，图2中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
通信接口204，用于与其他设备或通信网络通信。示例性的，通信接口204可以是收发模块、收发电路、收发器或者任何能够实现通信的装置；或者，通信接口204可以是位于处理器201内的输入输出接口，用以实现处理器的信号输入和信号输出。
存储器203，可以是具有存储功能的装置，用于存储指令和/或数据。其中，指令可以是计算机程序。
示例性的，存储器203可以是只读存储器(read-only memory，ROM)或可存储静态信息和/或指令的其他类型的静态存储设备，也可以是随机存取存储器(random access memory，RAM)或可存储信息和/或指令的其他类型的动态存储设备，还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)、磁盘存储介质或其他磁存储设备等，不予限制。
需要指出的是，存储器203可以独立于处理器201存在，也可以和处理器201集成在一起。存储器203可以位于通信装置200内，也可以位于通信装置200外，不予限制。
可选的，处理器201可以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203可以用于存储软件程序和数据。通信接口204为收发器时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。天线可以是相控阵天线，可以包括多阵元天线阵列。该多阵元天线阵列可以带有移相器或天线关断开关。
当通信装置开机后，处理器201可以读取存储器203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201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201，处理器201将基带信号转换为数据并对该数据进行处理。
在一种实现中，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。
作为一种可选的实现方式，通信装置200还可以包括输出设备205和输入设备206。输出设备205和处理器201通信，可以以多种方式来显示信息。例如，输出设备205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206和处理器201通信，可以以多种方式接收用户的输入。例如，输入设备206可以是鼠标、键盘、触摸屏设备或传感设备等。
需要说明的是，图2所示的结构并不构成对终端设备或网络设备的具体限定。比如，在本申请另一些实施例中，终端设备或网络设备可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，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。
为了方便理解本申请实施例的技术方案，首先给出本申请相关技术的简要介绍如下。
通道阵元：也可以称为天线阵元或天线阵子。一个通道可以对应多个通道阵元。对于一个通道，接收端接收到的是该通道对应的多个通道阵元发送的信号的合并(或叠加)值。
通道阵元的一致性误差：指不同通道阵元之间的幅度和/或相位差。通道阵元的幅度和相位可以分别理解为信号经过该通道阵元后幅度和相位的变化量。
天线端口：天线端口是逻辑上的概念，一个天线端口可以对应一个物理发射天线，也可以对应多个物理发射天线。在这两种情况下，终端设备的接收机(receiver)都不会去分解来自同一个天线端口的信号。因为从终端设备的角度来看，不管信道是由单个物理发射天线形 成的，还是由多个物理发射天线合并而成的，这个天线端口对应的参考信号(reference signal，RS)就定义了这个天线端口，终端设备可以根据这个天线端口对应的参考信号进行信道估计和数据解调。
实际应用中，无线电通信雷达、声呐地震探测导航、射电天文、医学等领域中的关键技术例如高分辨谱估计技术、超分辨波达方向估计技术等的优良性能依赖于良好的通道阵元一致性。然而，通道阵元的一致性误差不可避免地存在于各种应用场景中，从而对上述关键技术的性能造成影响。
示例性的，如图3a所示，通道阵元的一致性误差导致输出功率降低以及波束方向偏移。如图3b所示，在理想情况下，旁瓣的最大能量为-20dB。存在振幅误差的情况下，旁瓣的最大能量增加至-10dB，存在相位误差的情况下，旁瓣的最大能量增加至-8dB左右，即通道阵元的一致性误差导致旁瓣能量增加。
为了满足对通道阵元一致性的要求，需要对通道阵元的一致性误差进行估计。目前常用的估计方法为矢量旋转法。下面以图4所示的1个发送通道(Tx)和1个接收通道(Rx)，发送通道和接收通道均包括N个阵元的通信场景为例，对常用的矢量旋转法进行介绍。示例性的，该矢量旋转法的原理可以通过如下公式表示：
Y＝MX
即：
Figure PCTCN2022127438-appb-000011
其中，y i表示第i次测量时接收端确定的测量值。x j可以指示第j个通道阵元的幅度和相位值，幅度和相位值可以用一个复数表示。[m i1,m i2,...,m iN]表示第i次测量时的矢量旋转向量，具体的，m ij表示第i次测量时第j个通道阵元的矢量旋转值，该矢量旋转值用于调整通道阵元的幅度和/或相位。i,j＝1,2,...,N。以N等于4为例，矩阵M的一种简单设计可以为：
Figure PCTCN2022127438-appb-000012
由于Y为接收端测量所得，M可以预先设计，即Y和M均为已知量。因此，可以通过上述公式估计X，从而估计通道阵元的一致性误差。
以上以结果为导向对矢量旋转法进行了说明，下面从对整个收发过程进行建模的角度，对上述原理进行补充说明。
示例性的，对于第i次测量，接收端确定的测量值y i可以表示为：
Figure PCTCN2022127438-appb-000013
其中，·表示向量点乘。即向量元素一一对应相乘。
H Space表示空口信道。考虑通道阵元的导向矢量时，空口信道可以表示为：
Figure PCTCN2022127438-appb-000014
Figure PCTCN2022127438-appb-000015
表示到达角(angle of arrival，AOA)，是接收端的导向矢量；
Figure PCTCN2022127438-appb-000016
表示发送角(angle of depart，AOD)，是发送端的导向矢量。
Figure PCTCN2022127438-appb-000017
和
Figure PCTCN2022127438-appb-000018
为列向量。
Figure PCTCN2022127438-appb-000019
表示
Figure PCTCN2022127438-appb-000020
的共轭转置。
Figure PCTCN2022127438-appb-000021
的第i个元素表示为
Figure PCTCN2022127438-appb-000022
Figure PCTCN2022127438-appb-000023
的第j个元素表示为
Figure PCTCN2022127438-appb-000024
Figure PCTCN2022127438-appb-000025
表示克罗内克(Kronecker)乘积。
Figure PCTCN2022127438-appb-000026
和w T分别表示接收端和发送端的加权向量(或称为模拟权值)。
Figure PCTCN2022127438-appb-000027
的第i个元素表示 为
Figure PCTCN2022127438-appb-000028
w T的第j个元素表示为w T,j。
Figure PCTCN2022127438-appb-000029
和Λ T分别表示接收端和发送端的通道阵元的一致性误差复数。
Figure PCTCN2022127438-appb-000030
为行向量，Λ T为列向量。
Figure PCTCN2022127438-appb-000031
的第i个元素表示为γ R,i，Λ T的第j个元素表示为γ T,j。
m i表示第i次测量时的矢量旋转向量，m i,j表示第i次测量时，发送端的第j个通道阵元的旋转矢量值，m i,j是m i的第j个元素。m i为已知量。
综上，第i次测量时，接收端确定的测量值y i可以进一步表示为：
Figure PCTCN2022127438-appb-000032
其中：
Figure PCTCN2022127438-appb-000033
α T,j表示γ T,j的幅度信息，即发送端第j个通道阵元的幅度信息；
Figure PCTCN2022127438-appb-000034
表示γ T,j的相位信息，即发送端第j个通道阵元的相位信息。
Figure PCTCN2022127438-appb-000035
表示
Figure PCTCN2022127438-appb-000036
的相位信息，为已知量。
Figure PCTCN2022127438-appb-000037
表示w T,j的相位信息，为已知量。
A 0和∈ 0主要由接收端的通道阵元一致性误差导致。假设多次测量时空口信道和收发端的通道阵元一致性误差不变，那么A 0和∈ 0可以看作常数。
也就是说，由于
Figure PCTCN2022127438-appb-000038
和
Figure PCTCN2022127438-appb-000039
为已知量，A 0和∈ 0为常数，因此，x j之间的幅度比值与α T,j之间的幅度比值相等，x j之间的相位差值与
Figure PCTCN2022127438-appb-000040
之间的相位差值相等。而一致性误差估计的目的即为得到各个通道阵元之间的幅度比值和相位差值，从而，通过上述公式即可进行估计得到一致性误差。
上述方案中，需要假设多次测量时刻测量值的相位偏差(例如相噪或移动带来的相位偏差)相同。然而，实际的相控阵天线系统中，由于设备晶振的抖动或设备位置的移位等因素，不同时刻测量值的相位偏差是不同的。此外，随着载波频率的升高，晶振抖动幅度会变大，使得不同时刻测量值的相位偏差更加明显。由于一致性误差估计的一方面目的即为测量各个通道阵元之间的相位偏差，因此，受不同时刻测量值的不同相位偏差的影响，一致性误差估计的精度将大幅降低。
在考虑时变的相位偏差后，一致性误差估计的模型可以表示为：
Y＝DMX
其中，D表示相位偏差矩阵，D为对角矩阵，对角线上的值表示不同时刻的相位偏差。D为未知量。
基于该一致性误差估计模型可知，降低相位偏差对一致性误差估计影响的一种可能的方式是：对不同测量时刻的相位偏差进行补偿。也就是说，需要对相位偏差进行估计，从而估计相位偏差矩阵D，以进行相位偏差补偿。
基于此，本申请提供一种信道测量方法，能够根据第二天线端口对应的信道测量量估计N个第一天线端口的信道测量量的相位偏差，从而能够根据该相位偏差对N个第一天线端口的信道测量量进行相位补偿，提高第一天线端口的信道测量量的精度，进而降低相位偏差对 一致性误差估计的影响，提高一致性误差估计的精度。
下面将结合附图，以终端设备和网络设备之间的交互为例，对本申请实施例提供的方法进行展开说明。
可以理解的，本申请实施例中，终端设备或网络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。
需要说明的是，本申请下述实施例中各个设备之间的信息名称或信息中各参数的名称等只是一个示例，具体实现中也可以是其他的名称，本申请实施例对此不作具体限定。
示例性的，本申请下述实施例提供的方法可以应用于各种分时测量并联合测算的过程，例如，可以应用于一致性误差估计的场景。当然，此处仅是示例性的对本申请的应用场景进行说明，该应用场景对本申请不造成任何限定，本申请对下述提供的方法的应用场景也不作具体限定，例如还可以用于其他涉及分时测量联合测算的场景。
如图5所示，为本申请实施例提供的一种信道测量方法，该信道测量方法包括如下步骤：
S501、网络设备通过N个第一天线端口向终端设备发送第一信道状态信息参考信号(channel state information-reference signal，CSI-RS)i。相应的，终端设备接收来自网络设备的N个天线端口的第一CSI-RS i。
其中，i为从1至N的正整数，N为大于1的正整数。也就是说，网络设备通过N个第一天线端口向终端设备发送第一CSI-RS i，可以理解为：网络设备通过第一天线端口1发送第一CSI-RS 1，通过第一天线端口2发送第一CSI-RS 2，通过第一天线端口3发送第一CSI-RS 3，以此类推，直至通过第一天线端口N发送第一CSI-RS N。
可选的，该N个第一天线端口互不相同，因此，第一CSI-RS 1至第一CSI-RS N互不相同。网络设备通过N个第一天线端口发送的N个第一CSI-RS的时域位置不同，即，网络设备在N个测量时刻分别发送第一CSI-RS 1至第一CSI-RS N。
示例性的，如图6所示，网络设备可以在时域位置1发送第一CSI-RS 1，在时域位置2发送第一CSI-RS 2，以此类推，在时域位置N-1发送第一CSI-RS N-1，在时域位置N发送第一CSI-RS N。
其中，第一CSI-RS i用于信道测量。可选的，在一致性误差估计场景下，该第一CSI-RS i对应的信道测量量可以用于一致性误差估计。
可选的，网络设备在发送第一CSI-RS i时，可以通过矢量旋转向量M i调整第一CSI-RS i的幅度和/或向量。其中，第一CSI-RS 1至第一CSI-RS N对应的矢量旋转向量互不相同。示例性的，如图6所示，第一CSI-RS 1对应的矢量旋转向量为M 1，第一CSI-RS 2对应的矢量旋转向量为M 2，以此类推，第一CSI-RS N-1对应的矢量旋转向量为M N-1，第一CSI-RS N对应的矢量旋转向量为M N。
可选的，第一CSI-RS 1至第一CSI-RS N对应的矢量旋转向量可以组成矢量旋转矩阵。各个矢量旋转向量或矢量旋转矩阵可以是预先设计或协议定义的，本申请对此不作具体限定。
可选的，该N个第一天线端口为第一通道对应的天线端口。第一通道可以是发送端(即网络设备)的任意发送通道。
可选的，终端设备可以基于接收到的第一CSI-RS i进行信道测量，得到第一CSI-RS i对应的信道测量的测量量
Figure PCTCN2022127438-appb-000041
其中，上标A表示该测量量是第一天线端口(或第一CSI-RS)对应的测量量。第一CSI-RS 1至第一CSI-RS N对应的测量量可以表示为
Figure PCTCN2022127438-appb-000042
可选的，信道测量的测量量(或称为信道测量量)可以理解为信道估计值，其可以包括信道的相位信息，进一步的，还可以包括信道的幅度信息。
S502、网络设备通过第二天线端口向终端设备发送N个第二CSI-RS。相应的，终端设备接收来自网络设备的第二天线端口的N个第二CSI-RS。
也就是说，网络设备通过同一天线端口(即第二天线端口)向终端设备发送N次第二CSI-RS。
其中，该N个第二CSI-RS用于估计相位偏差。示例性的，该相位偏差可以是N个第一天线端口的信道测量量的相位偏差。即，本申请实施例可以通过第二天线端口发送的CSI-RS估计N个第一天线端口的信道测量量的相位偏差。
可选的，网络设备通过第二天线端口发送的N个第二CSI-RS的时域位置不同，即网络设备在N个测量时刻分别发送第二CSI-RS。
可选的，第一CSI-RS i和第i个第二CSI-RS可以满足如下(1)和(2)中的至少一项：
(1)第一CSI-RS i的时域位置和第i个第二CSI-RS的时域位置相同。也就是说，如图6所示，第一CSI-RS 1和第一个第二CSI-RS的时域位置相同，第一CSI-RS 2和第二个第二CSI-RS的时域位置相同，以此类推，第一CSI-RS N-1和第N-1个第二CSI-RS的时域位置相同，第一CSI-RS N和第N个第二CSI-RS的时域位置相同。
(2)第一CSI-RS i的频域位置和第i个第二CSI-RS的频域位置不同。也就是说，如图6所示，第一CSI-RS 1和第一个第二CSI-RS的频域位置不同，第一CSI-RS 2和第二个第二CSI-RS的频域位置不同，以此类推，第一CSI-RS N-1和第N-1个第二CSI-RS的频域位置不同，第一CSI-RS N和第N个第二CSI-RS的频域位置不同。
可选的，网络设备在发送第二CSI-RS时，可以通过矢量旋转向量C i调整第i个第二CSI-RS的幅度和/或向量。其中，N个第二CSI-RS对应的矢量旋转向量相同。在N个第二CSI-RS对应的矢量旋转向量相同的情况下，可以认为该N个第二CSI-RS对应的信道测量量的变化仅由相位偏差导致，从而可以通过该N个第二CSI-RS估计相位偏差。
可选的，N个第二CSI-RS对应的矢量旋转向量可以组成矢量旋转矩阵。示例性的，第二天线端口对应的该矢量旋转矩阵可以为全1矩阵。
可选的，该第二天线端口为第二通道对应的天线端口。第二通道为发送端(即网络设备)的与第一通道同源的发送通道。示例性的，第二通道与第一通道同源可以理解为：第二通道和第一通道共用本振，共用参考时钟等。
可选的，假设第一通道在t2时刻相对于t1时刻的相位变化值为θ 1，第二通道在t2时刻相对于t1时刻的相位变化值为θ 2，那么在第二通道与第一通道同源的情况下，θ 1＝θ 2。从而，利用同源通道的这一特性，可以根据第二通道对应的第二CSI-RS估计第一通道的相位偏差(即N个第一天线端口的信道测量量的相位偏差)。
可选的，网络设备可以根据通道的同源情况，将网络设备的Q个通道划分为P组。其中，每个通道组中的通道两两同源。示例性的，第p组内通道的编号(或索引)可以从q p-1+1至q p。即，Q个通道分为P组后，每个组的编号，以及每组内通道的编号可以如下所示：
[1 2 ... Q]＝[1,2,…,q 1,q 1+1…q 2,…,q P-1,q P-1+1…,q P]
其中，q 0＝0，q P＝Q。此时，该Q个通道的分组情况可以如图7所示。第一通道和第二通道可以是任一通道组中的两个通道。
可选的，本申请实施例中的“第一通道”也可以称为“待测通道”，“第二通道”也可以称为“辅助通道”。当然，第一通道和第二通道还可以有其他名称，本申请对此不作具体限定。
可选的，终端设备可以基于接收到的N个第二CSI-RS进行信道测量，得到第i个第二CSI-RS对应的信道测量量
Figure PCTCN2022127438-appb-000043
其中，上标B表示该测量量是第二天线端口(或第二CSI-RS)对应的测量量。N个第二CSI-RS对应的信道测量量可以表示为
Figure PCTCN2022127438-appb-000044
可选的，第一通道所在的通道组中除第二通道外，还存在其他通道(例如第三通道)时，网络设备还可以通过第三通道对应的第三天线端口发送N个第三CSI-RS。该N个第三CSI-RS也用于估计相位偏差。相应的，终端设备可以接收该N个第三CSI-RS，并进行信道测量，得到N个第三CSI-RS对应的信道测量量，具体实现可参考第二CSI-RS的相关说明。
可选的，在上述步骤S501和S502之前，网络设备可以向终端设备发送配置信息，该配置信息可以用于配置CSI-RS，例如，包括第一CSI-RS i和第二CSI-RS的索引信息、位置信息等。进一步的，该配置信息还可以用于配置N的取值等。终端设备在收到该配置信息后，可以根据配置信息的配置接收第一CSI-RS i和N个第二CSI-RS，并根据CSI-RS确定对应的信道测量量。
S503、终端设备向网络设备发送第一信息。相应的，网络设备接收来自终端设备的第一信息。其中，第一信息指示第一CSI-RS i对应的信道测量的结果。
其中，该信道测量的结果可以根据相位偏差和第一CSI-RS i对应的信道测量的测量量确定。该相位偏差是基于上述N个第二CSI-RS中的部分或全部第二CSI-RS得到的。
可选的，该第一CSI-RS i对应的信道测量的结果也可以理解为，根据该相位偏差进行相位补偿后的信道测量量。
作为一种可能的实现，第一信息可以包括相位偏差和第一CSI-RS i对应的信道测量的测量量。可选的，该场景下，网络设备可以根据相位偏差和该测量量确定第一CSI-RS i对应的信道测量的结果，终端设备无需计算该信道测量的结果，从而降低终端设备的实现复杂度和功耗。
作为另一种可能的实现，第一信息可以包括相位偏差和根据第一CSI-RS i对应的信道测量的测量量得到的值。示例性的，终端设备可以对该信道测量的测量量进行降噪等处理后携带在第一信息中发送给网络设备。网络设备可以根据相位偏差和根据该信道测量的测量量得到的值确定第一CSI-RS i对应的信道测量结果，终端设备无需计算该信道测量的结果。
作为又一种可能的实现方式，第一信息可以包括第一CSI-RS i对应的信道测量的结果，即终端设备向网络设备反馈相位补偿后的信道测量量。基于该实现，可以减少终端设备上报的信息量，从而降低资源开销。
可选的，第一信息中包括的具体参数可以是网络设备预先配置的，或者可以是终端设备自行确定的，本申请对此不作具体限定。
可选的，第一信息可以携带在物理上行共享信道(physical uplink shared channel，PUSCH)中，或者，第一信息可以携带在上行控制信息(uplink control information，UCI)中。
可选的，在步骤S503之前，网络设备可以向终端设备发送第二信息。相应的，终端设备接收来自网络设备的第二信息。该第二信息可以携带在上述用于配置CSI-RS的配置信息中，也可以不携带在该配置信息中，本申请对此不作具体限定。
其中，第二信息指示终端设备根据第二天线端口对应的信道测量量估计N个第一天线端口的信道测量量的相位偏差。或者，第二信息指示终端设备根据第二天线端口对应的信道测量量确定N个第一天线端口对应的信道测量结果。或者，第二信息指示第二天线端口对应的信道测量量用于N个第一天线端口对应的信道测量量的相位偏差估计。或者，第二信息指示N个第一天线端口用于信道测量，第二天线端口用于相位偏差估计。
需要说明的是，本申请实施例中的相位偏差设计只是第二天线端口的信道测量的一种应用形式，也可以有其他的形式。总的来说，第二天线端口上的参考信号的测量(或者说第二天线端口的信道测量)用于第一天线端口的信道测量。也就是说，本申请并不限定仅将第二天线端口的信道测量用于第一天线端口的相位偏差估计，还可以将根据第二天线端口的信道测量得到的其他估计量用于第一天线端口信道测量。
可选的，天线端口对应的信道测量量，可以理解为：通过天线端口发送的CSI-RS对应的信道测量量。N个第一天线端口对应的信道测量结果，可以理解为：通过N个第一天线端口发送的第一CSI-RS i对应的信道测量的结果。
作为一种可能的实现，第二信息可以包括N个第一天线端口的索引和第二天线端口的索引，例如，可以在N个第一天线端口的配置信息中携带第二天线端口的索引。或者，第二信息可以包括第一CSI-RS i的索引和第二CSI-RS的索引，例如，可以在第一CSI-RS i的配置信息中携带第二CSI-RS的索引。
作为一种示例，第二CSI-RS的索引可以位于第一CSI-RS i的配置信息中的特定字段中，该特定字段可以表示用于第一CSI-RS i对应的信道测量的CSI-RS，或者表示用于第一天线端口的信道测量的天线端口。因此，在该特定字段承载第二CSI-RS的索引的情况下，可以表示第二CSI-RS对应的信道测量可以用于第一CSI-RS i对应的信道测量，或者可以表示第二天线端口的信道测量用于第一天线端口的信道测量。
作为另一种示例，还可以在第一CSI-RS i的配置信息中携带第二CSI-RS的用途，例如，在该配置信息中还指示第二CSI-RS对应的信道测量用于第一CSI-RS i对应的信道测量的信息，或者，还指示第二天线端口的信道测量用于第一天线端口的信道测量。
作为另一种可能的实现，第二信息可以包括第一通道的索引和第二通道的索引，例如，可以在第一通道的配置信息中携带第二通道的索引。终端设备收到通道的索引后，可以根据通道和天线端口的对应关系确定N个第一天线端口和第二天线端口。
作为又一种可能的实现，第二信息可以包括第一通道的索引和通道分组信息，该通道分组信息指示通道分组情况，例如指示某个通道组包括的通道。终端设备收到该第二信息后，可以根据第一通道的索引确定第一通道所在的通道组，从而将该通道组中除第一通道外的其他通道确定为辅助通道。相应的，网络设备通过该通道组中除第一通道外的其他通道对应的天线端口发送用于相位偏差估计的CSI-RS。
可选的，第二信息可以携带在无线资源控制(radio resource control，RRC)消息、或下行控制信息(downlink control information，DCI)、或媒体接入控制-控制元素(media access control-control element，MAC-CE)中。当然，第二信息还可以携带在其他消息中，例如，第二信息还可以携带在系统信息，例如系统信息块(system information block，SIB)中，本申请对此不作具体限定。
可选的，在步骤S503之前，终端设备可以根据M个第二CSI-RS对应的M个信道测量量确定相位偏差，M为小于或等于N的正整数。即，终端设备可以根据上述N个第二CSI-RS中的部分或全部第二CSI-RS对应的信道测量量确定相位偏差。其中，CSI-RS对应的信道测量量可以理解为根据该CSI-RS得到的信道测量量。示例性的，终端设备可以根据上述第二信息的指示执行相位偏差的确定。
可选的，该M个第二CSI-RS可以是N个第二CSI-RS中信号质量最强的前M个第二CSI-RS。信号质量可以通过参考信号接收功率(reference signal receiving power，RSRP)、参考信号接收质量(reference signal receiving quality，RSRQ)等表示。
可选的，该相位偏差可以包括M个元素，该M个元素位于相位偏差矩阵的主对角线上。该相位偏差矩阵为对角矩阵。
作为一种可能的实现，终端设备可以根据上述M个第二CSI-RS中的第j个第二CSI-RS对应的信道测量量确定相位偏差的第j个元素。j为从1至M的正整数，即，终端设备可以根据第1个第二CSI-RS对应的信道测量量确定相位偏差的第1个元素，根据第2个第二CSI-RS对应的信道测量量确定相位偏差的第2个元素，以此类推，根据第M个第二CSI-RS对应的信道测量量确定相位偏差的第M个元素。
示例性的，以M等于N为例，该相位偏差和N个第二CSI-RS对应的信道测量量可以满足如下关系：
Figure PCTCN2022127438-appb-000045
其中，Δθ为相位偏差，angle用于求解相位角。
Figure PCTCN2022127438-appb-000046
表示第j个第二CSI-RS对应的信道测量量。
作为另一种可能的实现，终端设备可以根据上述M个第二CSI-RS中的第j个第二CSI-RS对应的信道测量量以及第一数值确定相位偏差的第j个元素。j为从1至M的正整数，即，终端设备可以根据第1个第二CSI-RS对应的信道测量量和第一数值确定相位偏差的第1个元素，根据第2个第二CSI-RS对应的信道测量量和第一数值确定相位偏差的第2个元素，以此类推，根据第M个第二CSI-RS对应的信道测量量和第一数值确定相位偏差的第M个元素。
可选的，第一数值可以为上述M个第二CSI-RS中的一个第二CSI-RS对应的信道测量量，即第一数值为第m个第二CSI-RS对应的信道测量量，m为1至M中的一个正整数。或者，第一数值可以为预设值，例如，第一数值的取值可以等于1。当然，第一数值的取值还可以为其他值，本申请对此不作具体限定。
示例性的，以M等于N为例，该相位偏差和N个第二CSI-RS对应的信道测量量可以满足如下关系：
Figure PCTCN2022127438-appb-000047
其中，Δθ为相位偏差，angle用于求解相位角。
Figure PCTCN2022127438-appb-000048
表示第j个第二CSI-RS对应的信道测量量。C表示第一数值。
可选的，网络设备还通过第三天线端口发送N个第三CSI-RS的情况下，终端设备也可以根据M个第三CSI-RS对应的信道测量量确定相位偏差。之后，将根据M个第二CSI-RS对应的信道测量量确定的相位偏差，和，根据M个第三CSI-RS对应的信道测量量确定的相位偏差，得到最终的相位偏差。例如对二者取平均值或最大值或最小值，得到最终的相位偏差。
可选的，相位偏差和相位偏差矩阵之间的关系可以表示为：
D＝diag(Δθ)
其中，diag用于构造对角矩阵。
可选的，终端设备在确定相位偏差后，可以根据相位偏差和第一CSI-RS i对应的信道测量的测量量，确定第一CSI-RS i对应的信道测量的结果。
可选的，第一CSI-RS i对应的信道测量的结果、相位偏差、第一CSI-RS i对应的信道测量的测量量可以满足如下公式(1)：
Figure PCTCN2022127438-appb-000049
其中，
Figure PCTCN2022127438-appb-000050
表示该信道测量的结果。D表示相位偏差矩阵。该相位偏差Δθ中的元素位于 相位偏差矩阵的主对角线上，二者满足：D＝diag(Δθ)。Y A表示该信道测量的测量量。
可选的，作为一种可能的实现，Y A也可以替换为根据Y A得到的值，例如，终端设备可以对Y A进行降噪等处理，采用处理后的结果确定信道测量的结果。
其中，exp表示以自然常数e为底的指数函数。exp(D)表示将相位偏差矩阵D中的每个元素变换为以e为底的指数形式。exp(D)记为
Figure PCTCN2022127438-appb-000051
Figure PCTCN2022127438-appb-000052
表示矩阵
Figure PCTCN2022127438-appb-000053
的逆矩阵。
可选的，由于相位偏差矩阵为对角矩阵，因此[exp(D)] -1＝exp(-D)，从而上述公式(1)也可以描述为如下公式(2)的形式：
Figure PCTCN2022127438-appb-000054
可选的，由于相位偏差包括多个元素，因此，相位偏差Δθ可以表示为行向量的形式，即Δθ＝[Δθ 1 Δθ 1 … Δθ N]，其中，Δθ n表示相位偏差Δθ的第n个元素。在信道测量的测量量Y A和信道测量的结果
Figure PCTCN2022127438-appb-000055
表示为如下列向量的形式的情况下：
Figure PCTCN2022127438-appb-000056
Figure PCTCN2022127438-appb-000057
其中，
Figure PCTCN2022127438-appb-000058
表示信道测量量的第n个元素，
Figure PCTCN2022127438-appb-000059
表示信道测量结果的第n个元素。则，上述公式(1)也可以描述为如下公式(3)或公式(4)或公式(5)的形式：
Figure PCTCN2022127438-appb-000060
Figure PCTCN2022127438-appb-000061
Figure PCTCN2022127438-appb-000062
需要说明的是，上述公式(1)至公式(5)仅是示例性的对第一CSI-RS i对应的信道测量的结果、相位偏差、以及第一CSI-RS i对应的信道测量的测量量之间满足关系进行说明，三者还可以满足其他关系，例如，可以在上述公式(1)至公式(5)的等号右边乘以某个系数等，本申请对此不作具体限定。
可选的，在一致性误差估计场景下，网络设备获取第一CSI-RS i对应的信道测量的结果后，可以进行一致性误差估计。
示例性的，一致性误差估计模型为Y＝DMX时，假设
Figure PCTCN2022127438-appb-000063
则：
Figure PCTCN2022127438-appb-000064
从而，
Figure PCTCN2022127438-appb-000065
其中，M -1表示矩阵M的逆矩阵。由于M为已知量，因此M -1为已知量。进一步的，
Figure PCTCN2022127438-appb-000066
可以根据上述图5所示的流程得到，因此，网络设备可以估计X，从而估计第一通道的通道阵元的一致性误差。进一步的，得到一致性误差后，网络设备可以对通道阵元的一致性误差进行补偿。
需要说明的是，上述仅以该第一CSI-RS i对应的信道测量结果用于一致性误差估计为例进行说明。当然，该信道测量结果还可以有其他用途，网络设备可以根据实际需求灵活运用该信道测量结果，本申请对此不作具体限定。
综上，本申请提供的方案中，如图8所示，网络设备通过第二天线端口发送N个第二CSI- RS进行测量，以估计相位偏差。通过N个第一天线端口发送第一CSI-RS i进行信道测量。通过估计的相位偏差对第一天线端口对应的信道测量量进行补偿，得到第一天线端口对应的信道测量的结果，即补偿后的信道测量量。由于第一CSI-RS i对应的信道测量的结果考虑了相位偏差，因此能够提高第一CSI-RS i对应的信道测量结果的精度。
进一步的，在一致性误差估计场景中，可以降低相位偏差对一致性误差估计的影响，提高一致性误差估计的精度。示例性的，如图9所示的累积分布函数(cumulative distribution function，CDF)图所示，在信噪比(signal-to-noise ratio，SNR)为30分贝(dB)的场景下，本申请的方案相比于未进行相偏补偿的方案，一致性误差估计的精度(图9中以振幅(amlitude)归一化均方误差(normalized mean squared error，NMSE))最大可以提升将近3dB。在高信噪比(例如信噪比为40dB或50dB)场景下，本申请方案的估计精度可以提升5dB以上。
此外，本申请的方案无需额外增加硬件，利用发送端已有的通道对应的天线端口即可估计相位偏差，复杂度较低，可以降低应用成本。
在一些实施例中，网络设备可以重复发送某些第一CSI-RS。例如，网络设备可以通过第一天线端口I向终端设备重复发送K次第一CSI-RS I，I为1至N中的正整数，K为正整数。相应的，终端设备通过第一天线端口I重复接收K次第一CSI-RS I。
可选的，该场景下，第一CSI-RS I对应的信道测量量为重复接收的K次第一CSI-RS I对应的信道测量量的平均值，或其中的最大值或最小值。
示例性的，以I等于2，K等于3为例，如图10所示，网络设备重复发送3次第一CSI-RS 2，分别记为第一CSI-RS 21、第一CSI-RS 22、和第一CSI-RS 23。此时，第一CSI-RS 2对应的信道测量量
Figure PCTCN2022127438-appb-000067
可以为第一CSI-RS 21对应的信道测量量
Figure PCTCN2022127438-appb-000068
第一CSI-RS 22对应的信道测量量
Figure PCTCN2022127438-appb-000069
和第一CSI-RS 23对应的信道测量量
Figure PCTCN2022127438-appb-000070
的平均值，或三者中的最大值或最小值。
可选的，在网络设备重复发送K次第一CSI-RS I的情况下，还可以通过第二天线端口向终端设备发送K次第I个第二CSI-RS。
可选的，该场景下第I个第二CSI-RS对应的信道测量量可以为重复接收的K次第I个第二CSI-RS对应的信道测量量的平均值，或其中的最大值或最小值。
示例性的，以I等于2，K等于3为例，如图10所示，网络设备重复发送3次第2个第二CSI-RS。也就是说，网络设备实际通过第二天线端口发送N+K-1个第二CSI-RS。此时，第2个第二CSI-RS对应的信道测量量
Figure PCTCN2022127438-appb-000071
可以为第二CSI-RS 21对应的信道测量量
Figure PCTCN2022127438-appb-000072
第二CSI-RS 22对应的信道测量量
Figure PCTCN2022127438-appb-000073
和第二CSI-RS 23对应的信道测量量
Figure PCTCN2022127438-appb-000074
的平均值，或三者中的最大值或最小值。
基于第一CSI-RS和第I个第二CSI-RS的重复发送，可以使得终端设备根据重复接收的多次CSI-RS确定信道测量量，对根据单次接收得到的信道测量量进行降噪，从而提高信道测量量的精度。
可选的，网络设备可以向终端设备发送第三信息。相应的，终端设备接收来自网络设备的第三信息。其中，该第三信息指示第一CSI-RS I的重复次数K。示例性的，该第三信息可以携带在用于配置第一CSI-RS I的信息中。
作为一种可能的实现，第三信息可以包括第一CSI-RS I的索引和重复次数K，或者，第三信息可以包括发送第一CSI-RS I的第一天线端口I的索引和重复次数K。
作为另一种可能的实现，第三信息可以包括重复次数K。该场景下，默认每个第一CSI-RS i均重复发送K次。
作为再一种可能的实现，第三信息可以包括索引I和重复次数K，表示第I个第一CSI-RS(即第一CSI-RS I)重复K次。或者说，表示第I个第一CSI-RS至第I+K-1个第一CSI-RS为相同的CSI-RS。
可选的，上述图5所示的流程，可以理解为得到一个相位偏差和一个信道测量结果的一轮测量过程。此外，网络设备和终端设备进行多轮测量，在每一轮测量中得到一个相位偏差和信道测量结果。
作为一种可能的实现，进行多轮测量的场景下，终端设备可以根据上报周期向网络设备发送第一信息。即终端设备周期性地向网络设备指示信道测量结果。示例性的，若在一个上报周期内进行了多轮测量，那么终端设备可以向网络设备指示该上报周期内最后一轮测量的信道测量结果；或者，终端设备可以根据该多轮测量的信道测量结果确定出最终的信道测量结果并向网络设备指示。
可选的，该上报周期可以是网络设备配置的，例如，网络设备可以在CSI-RS的测量配置中配置该上报周期，或者可以是终端设备自定义的，或者可以是协议预定义的，本申请对此不作具体限定。
作为另一种可能的实现，进行多轮测量的场景下，终端设备可以基于事件的触发向网络设备指示信道测量结果，即在触发事件发生的情况下，终端设备向网络设备指示信道测量的结果。该触发事件例如可以为：相位偏差大于第一阈值，第一天线端口对应的信道测量量大于第二阈值等。
可选的，触发事件、第一阈值、第二阈值可以是网络设备配置的，或者可以是终端设备自定义的，或者，可以是协议预定义的，本申请对此不作具体限定。
可选的，在上述步骤S501之前，网络设备可以根据终端设备的测量反馈结果进行一致性误差估计，在估计的一致性误差大于阈值的情况下，执行图5所示的方法。或者，网络设备也可以在存在特殊性需求，例如需要获知更精确的信道测量结果时，执行图5所示的方法。即，图5所示方法的执行可以通过一致性误差大于阈值触发，也可以通过网络设备的特殊需求触发。当然，也可以通过其他事件触发，本申请对此不作具体限定。
需要说明的是，本申请上述实施例中仅以参考信号为CSI-RS为例进行说明，本申请并不限定参考信号的形式，例如上述CSI-RS也可以替换为其他类型的参考信号。
可以理解的是，以上各个实施例中，由网络设备实现的方法和/或步骤，也可以由可用于该网络设备的部件(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；由终端设备实现的方法和/或步骤，也可以有可用于该终端设备的部件(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网络设备，或者包含上述网络设备的装置，或者为可用于网络设备的部件，例如芯片或芯片系统；或者，该通信装置可以为上述方法实施例中的终端设备，或者包含上述终端设备的装置，或者为可用于终端设备的部件，例如芯片或芯片系统。
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。
如图11所示，为本申请实施例提供的一种网络设备和终端设备的结构示意图。参见图11，网络设备可以包括导频生成模块、发送信号处理模块、发送端口控制模块、多阵元天线阵列。进一步的，网络设备还可以包括一致性误差估计模块、一致性误差补偿模块。
可选的，导频生成模块用于生成第一CSI-RS i和第二CSI-RS。发送信号处理模块用于实现对信号的编码、调制等基带处理得到基带信号，并将基带信号调制为射频信号。多阵元天线阵列可以包括相位调节单元，用于完成第一CSI-RS i和第二CSI-RS的发送。发送端口控制模块可以用于控制天线端口的切换，使得网络设备在不同测量时刻能够通过不同的第一天线端口发送第一CSI-RS i，以及通过相同的第二天线端口发送第二CSI-RS。示例性的，发送端口控制模块可以通过控制多阵元天线阵列的相位调节单元或者天线关断开关等方式控制天线端口的切换。
可选的，一致性误差估计模块用于根据终端设备上报的第一信息，确定第一CSI-RS i对应的信道测量的结果，从而估计一致性误差。一致性误差补偿模块用于对通道阵元的一致性误差进行补偿。
参见图11，终端设备可以包括接收天线、接收信号处理模块、信道估计模块、相偏估计模块。进一步的，终端设备还可以包括相偏补偿模块。
可选的，接收天线用于接收射频信号。接收信号处理模块用于实现下变频及基带信号的恢复。信道估计模块用于确定信道测量量。相偏估计模块用于根据N个第二CSI-RS对应的信道测量量估计相位偏差。相偏补偿模块用于确定第一CSI-RS i对应的信道测量的结果，或者说，用于根据相偏偏差对第一CSI-RS i对应的信道测量量进行补偿。
如图12所示，为本申请实施例提供的另一种通信装置的结构示意图。该通信装置120包括处理模块1201和收发模块1202。该通信装置120可以用于实现上述网络设备或终端设备的功能。
在一些实施例中，该通信装置120还可以包括存储模块(图12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1202，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1202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1202，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网络设备或终端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1201，可以用于执行上述方法实施例中由网络设备或终端设备执行的处理类(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120用于实现上述终端设备的功能时：
收发模块1202，用于接收来自网络设备的N个第一天线端口的第一信道状态信息参考信号CSI-RS i，i为从1至N的正整数，N为大于1的正整数，第一CSI-RS i用于信道测量；收发模块1202，还用于接收来自网络设备的第二天线端口的N个第二CSI-RS，N个第二CSI-RS用于估计相位偏差；收发模块1202，还用于向网络设备发送第一信息，第一信息指示信道 测量的结果，信道测量的结果是根据相位偏差和信道测量的测量量确定。
可选的，处理模块1201，用于根据M个第二CSI-RS对应的M个信道测量量确定相位偏差，M为小于或等于N的正整数。
可选的，处理模块1201，具体用于根据第j个第二CSI-RS对应的信道测量量确定相位偏差的第j个元素；或者，根据第j个第二CSI-RS对应的信道测量量和第一数值的比值确定相位偏差的第j个元素；其中，j是从1至M的正整数，相位偏差的M个元素位于相位偏差矩阵的主对角线上。
可选的，收发模块1202，还用于接收来自网络设备的第二信息，第二信息指示终端设备根据第二天线端口对应的信道测量量估计N个第一天线端口对应的信道测量量的相位偏差；或者，第二信息指示终端设备根据第二天线端口对应的信道测量量确定N个第一天线端口对应的信道测量的结果。
可选的，收发模块1202，用于通过第一天线端口I接收来自网络设备的第一CSI-RS I，包括：收发模块1202，用于通过所述第一天线端口I重复接收K次所述第一CSI-RS I，I为1至N中的正整数，K为正整数。收发模块1202，用于通过所述第二天线端口接收来自网络设备的第I个第二CSI-RS，包括：收发模块1202，用于通过所述第二天线端口重复接收K次所述第I个第二CSI-RS。
可选的，收发模块1202，还用于接收来自网络设备的第三信息，第三信息指示第一CSI-RS I的重复次数K。
可选的，收发模块1202，用于向网络设备发送第一信息，包括：收发模块1202，用于根据上报周期向网络设备发送第一信息。
在该通信装置120用于实现上述网络设备的功能时：
收发模块1202，用于通过N个第一天线端口向终端设备发送第一信道状态信息参考信号CSI-RS i，i为从1至N的正整数，N为大于1的正整数，第一CSI-RS i用于信道测量；收发模块1202，还用于通过第二天线端口向终端设备发送N个第二CSI-RS，N个第二CSI-RS用于估计相位偏差；收发模块1202，还用于接收来自终端设备的第一信息，第一信息指示信道测量的结果，信道测量的结果是根据相位偏差和信道测量的测量量确定。
可选的，收发模块1202，还用于向终端设备发送第二信息，第二信息指示终端设备根据第二天线端口对应的信道测量量估计N个第一天线端口对应的信道测量量的相位偏差；或者，第二信息指示终端设备根据第二天线端口对应的信道测量量确定N个第一天线端口对应的信道测量的结果。
可选的，收发模块1202，具体用于通过第一天线端口I向终端设备重复发送K次第一CSI-RS I，I为1至N中的正整数，K为正整数；收发模块1202，具体用于通过第二天线端口向终端设备重复发送K次第I个第二CSI-RS。
可选的，收发模块1202，还用于向终端设备发送第三信息，第三信息指示第一CSI-RS I的重复次数K。
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120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。
在一些实施例中，在硬件实现上，本领域的技术人员可以想到该通信装置120可以采用图2所示的通信装置200的形式。
作为一种示例，图12中的处理模块1201的功能/实现过程可以通过图2所示的通信装置200中的处理器201调用存储器203中存储的计算机执行指令来实现。图12中的收发模块1202的功能/实现过程可以通过图2所示的通信装置200中的通信接口204来实现。
在一些实施例中，当图12中的通信装置120是芯片或芯片系统时，收发模块1202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1201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120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。
作为一种可能的产品形态，本申请实施例所述的网络设备或终端设备，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，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，用于保存必要的计算机程序和数据。该计算机程序可以包括指令，处理器可以调用存储器中存储的计算机程序中的指令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，本申请实施例所述的全部或部分流程(或功能)被实现。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 (30)

  1. 一种信道测量方法，其特征在于，所述方法包括：
    接收来自网络设备的N个第一天线端口的第一信道状态信息参考信号CSI-RS i，i为从1至N的正整数，N为大于1的正整数，所述第一CSI-RS i用于信道测量；
    接收来自所述网络设备的第二天线端口的N个第二CSI-RS，所述N个第二CSI-RS用于估计相位偏差；
    向所述网络设备发送第一信息，所述第一信息指示所述信道测量的结果，所述信道测量的结果是根据所述相位偏差和所述信道测量的测量量确定。
  2. 根据权利要求1所述的方法，其特征在于，所述第一CSI-RS i和第i个第二CSI-RS满足如下至少一项：
    所述第一CSI-RS i的时域位置和所述第i个第二CSI-RS的时域位置相同；或者，
    所述第一CSI-RS i的频域位置和所述第i个第二CSI-RS的频域位置不同。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    根据M个所述第二CSI-RS对应的M个信道测量量确定所述相位偏差，M为小于或等于N的正整数。
  4. 根据权利要求3所述的方法，其特征在于，所述根据M个所述第二CSI-RS对应的M个信道测量量确定所述相位偏差，包括：
    根据第j个所述第二CSI-RS对应的信道测量量确定所述相位偏差的第j个元素；或者，根据第j个所述第二CSI-RS对应的信道测量量和第一数值的比值确定所述相位偏差的第j个元素；
    其中，j是从1至M的正整数，所述相位偏差的M个元素位于相位偏差矩阵的主对角线上。
  5. 根据权利要求4所述的方法，其特征在于，所述第一数值为第m个所述第二CSI-RS对应的信道测量量，m为1至M中的一个正整数；
    或者，所述第一数值为预设值。
  6. 根据权利要求4或5所述的方法，其特征在于，所述M等于N，所述相位偏差矩阵D满足：
    D＝diag(Δθ)
    Figure PCTCN2022127438-appb-100001
    或者，
    Figure PCTCN2022127438-appb-100002
    其中，diag用于构造对角矩阵，Δθ为所述相位偏差，angle用于求解相位角；
    Figure PCTCN2022127438-appb-100003
    表示第j个所述第二CSI-RS对应的信道测量量；C表示所述第一数值。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述第一信息包括所述相位偏差和所述信道测量的测量量；或者，
    所述第一信息包括所述相位偏差和根据所述信道测量的测量量得到的值；或者，
    所述第一信息包括所述信道测量的结果。
  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：
    接收来自所述网络设备的第二信息，所述第二信息指示终端设备根据所述第二天线端口对应的信道测量量估计所述N个第一天线端口对应的信道测量量的相位偏差；或者，所述第二信息指示终端设备根据所述第二天线端口对应的信道测量量确定所述N个第一天线端口对应的信道测量的结果。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，通过第一天线端口I接收来自网 络设备的第一CSI-RS I，包括：
    通过所述第一天线端口I重复接收K次所述第一CSI-RS I，I为1至N中的正整数，K为正整数；
    通过所述第二天线端口接收来自网络设备的第I个第二CSI-RS，包括：
    通过所述第二天线端口重复接收K次所述第I个第二CSI-RS。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    接收来自所述网络设备的第三信息，所述第三信息指示所述第一CSI-RS I的重复次数K。
  11. 根据权利要求9或10所述的方法，其特征在于，所述第一CSI-RS I对应的信道测量量为所述重复接收的K次第一CSI-RS I对应的信道测量量的平均值；
    所述第I个第二CSI-RS对应的信道测量量为所述重复接收的K次第I个第二CSI-RS对应的信道测量量的平均值。
  12. 根据权利要求1-11任一项所述的方法，其特征在于，所述信道测量的结果、所述相位偏差、所述信道测量的测量量满足：
    Figure PCTCN2022127438-appb-100004
    其中，
    Figure PCTCN2022127438-appb-100005
    表示所述信道测量的结果，D表示相位偏差矩阵，所述相位偏差中的元素位于所述相位偏差矩阵的主对角线上，Y A表示所述信道测量的测量量，exp表示以自然常数e为底的指数函数。
  13. 根据权利要求1-12任一项所述的方法，其特征在于，所述向所述网络设备发送第一信息，包括：
    根据上报周期向所述网络设备发送所述第一信息。
  14. 一种信道测量方法，其特征在于，所述方法包括：
    通过N个第一天线端口向终端设备发送第一信道状态信息参考信号CSI-RS i，i为从1至N的正整数，N为大于1的正整数，所述第一CSI-RS i用于信道测量；
    通过第二天线端口向所述终端设备发送N个第二CSI-RS，所述N个第二CSI-RS用于估计相位偏差；
    接收来自所述终端设备的第一信息，所述第一信息指示所述信道测量的结果，所述信道测量的结果是根据所述相位偏差和所述信道测量的测量量确定。
  15. 根据权利要求14所述的方法，其特征在于，所述第一CSI-RS i和第i个第二CSI-RS满足如下至少一项：
    所述第一CSI-RS i的时域位置和所述第i个第二CSI-RS的时域位置相同；或者，
    所述第一CSI-RS i的频域位置和所述第i个第二CSI-RS的频域位置不同。
  16. 根据权利要求14或15所述的方法，其特征在于，所述相位偏差根据M个所述第二CSI-RS对应的M个信道测量量确定，M为小于或等于N的正整数。
  17. 根据权利要求16所述的方法，其特征在于，所述相位偏差包括M个元素，所述M个元素位于相位偏差矩阵的主对角线上；
    其中，第j个元素根据第j个所述第二CSI-RS对应的信道测量量确定；或者，第j个元素根据第j个所述第二CSI-RS对应的信道测量量和第一数值的比值确定；j是从1至M的正整数。
  18. 根据权利要求17所述的方法，其特征在于，所述第一数值为第m个所述第二CSI-RS对应的信道测量量，m为1至M中的一个正整数；
    或者，所述第一数值为预设值。
  19. 根据权利要求17或18所述的方法，其特征在于，所述M等于N，所述相位偏差矩阵D满足：
    D＝diag(Δθ)
    Figure PCTCN2022127438-appb-100006
    或者，
    Figure PCTCN2022127438-appb-100007
    其中，diag用于构造对角矩阵，Δθ为所述相位偏差，angle用于求解相位角；
    Figure PCTCN2022127438-appb-100008
    表示第j个所述第二CSI-RS对应的信道测量量；C表示所述第一数值。
  20. 根据权利要求14-19任一项所述的方法，其特征在于，所述第一信息包括所述相位偏差和所述信道测量的测量量；或者，
    所述第一信息包括所述相位偏差和根据所述信道测量的测量量得到的值；或者，
    所述第一信息包括所述信道测量的结果。
  21. 根据权利要求14-20任一项所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第二信息，所述第二信息指示所述终端设备根据所述第二天线端口对应的信道测量量估计所述N个第一天线端口对应的信道测量量的相位偏差；或者，所述第二信息指示终端设备根据所述第二天线端口对应的信道测量量确定所述N个第一天线端口对应的信道测量的结果。
  22. 根据权利要求14-21任一项所述的方法，其特征在于，通过第一天线端口I向终端设备发送第一CSI-RS I包括：
    通过所述第一天线端口I向所述终端设备重复发送K次所述第一CSI-RS I，I为1至N中的正整数，K为正整数；
    通过所述第二天线端口向所述终端设备发送第I个第二CSI-RS，包括：
    通过所述第二天线端口向所述终端设备重复发送K次所述第I个第二CSI-RS。
  23. 根据权利要求22所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第三信息，所述第三信息指示所述第一CSI-RS I的重复次数K。
  24. 根据权利要求14-23任一项所述的方法，其特征在于，所述信道测量的结果、所述相位偏差、所述信道测量的测量量满足：
    Figure PCTCN2022127438-appb-100009
    其中，
    Figure PCTCN2022127438-appb-100010
    表示所述信道测量的结果，D表示相位偏差矩阵，所述相位偏差中的元素位于所述相位偏差矩阵的主对角线上，Y A表示所述信道测量的测量量，exp表示以自然常数e为底的指数函数。
  25. 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1-13任一项所述的方法。
  26. 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14-24任一项所述的方法。
  27. 一种计算机可读存储介质，其特征在于，计算机可读存储介质存储有计算机指令或程序，当计算机指令或程序在计算机上运行时，使得如权利要求1-13任一项所述的方法被执行。
  28. 一种计算机可读存储介质，其特征在于，计算机可读存储介质存储有计算机指令或程序，当计算机指令或程序在计算机上运行时，使得如权利要求14-24任一项所述的方法被执行。
  29. 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1-13任一项所述的方法被执行。
  30. 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14-24任一项所述的方法被执行。
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