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CN-122001714-A - Wireless channel measurement method and communication device

CN122001714ACN 122001714 ACN122001714 ACN 122001714ACN-122001714-A

Abstract

The embodiment of the application provides a wireless channel measurement method and a communication device, which relate to the field of communication and can reduce the number of REs occupied by an antenna port in a channel estimation process and reduce the overhead in the channel estimation process, thereby improving the data channel resource occupation ratio and the channel estimation precision. The method includes transmitting a first signal through at least one port group. Each port group includes a plurality of antenna ports supporting code division multiplexing. The first signal comprises a plurality of resource elements occupied by at least one port group. The number of the resource particles occupied by the first port group is smaller than the number of the antenna ports in the first port group. The first port group is any one of the at least one port group. Channel parameters for each antenna port in at least one port group are received.

Inventors

  • NING BOYU
  • LI GAIYOU
  • LIU FENGWEI

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (12)

  1. 1. A method for measuring a radio channel, comprising: The method comprises the steps of transmitting a first signal through at least one port group, wherein each port group comprises a plurality of antenna ports supporting code division multiplexing, the first signal comprises a plurality of resource particles occupied by the at least one port group, the number of the resource particles occupied by the first port group is smaller than that of the antenna ports in the first port group, and the first port group is any port group in the at least one port group; and the channel parameters of the antenna ports in the at least one port group are determined through a compressed sensing algorithm and the measurement result of the first signal.
  2. 2. A method for measuring a radio channel, comprising: The method comprises the steps of measuring a first signal, wherein the first signal comprises a plurality of resource elements occupied by at least one port group, each port group comprises a plurality of antenna ports supporting code division multiplexing, the number of the resource elements occupied by the first port group is smaller than that of the antenna ports in the first port group, and the first port group is any port group in the at least one port group; And determining the channel parameters of the antenna ports in the at least one port group through a compressed sensing algorithm and the measurement result of the first signal.
  3. 3. The method according to claim 1 or 2, wherein any resource element occupied by the first port group includes pilot signals transmitted by each antenna port in the first port group.
  4. 4. The method of claim 3 wherein the first port group comprises a first antenna port and a second antenna port, wherein pilot signals transmitted by the first antenna port on each resource element occupied by the first port group form a first sequence, wherein pilot signals transmitted by the second antenna port on each resource element occupied by the first port group form a second sequence, and wherein the first sequence is non-orthogonal to the second sequence.
  5. 5. The method of claim 3 or 4, wherein a pilot signal transmitted by a first antenna port on a first resource element is associated with a random sequence symbol and a weight corresponding to the first antenna port on the first resource element, wherein the first antenna port is any antenna port in the first port group, and the first resource element is any resource element in resource elements occupied by the first port group.
  6. 6. The method of claim 5, wherein weights corresponding to the antenna ports in the at least one port group at each resource particle together form an oversampled discrete fourier transform matrix, and dimensions of the discrete fourier transform matrix are M and N, where M is a number of antenna ports in the at least one port group, and N is a number of resource particles occupied by the at least one port group.
  7. 7. The method according to claim 5 or 6, wherein the random sequence symbols corresponding to each antenna port in the first port group on the same resource element are the same.
  8. 8. A communication device comprising means or units for performing the method of any of claims 1-7.
  9. 9. A communication device comprising one or more processors configured to execute a computer program or instructions to implement the method of any of claims 1-7.
  10. 10. A communication device comprising a memory for storing computer programs or instructions and one or more processors for executing the computer programs or instructions in the memory, causing the communication device to perform the method of any of claims 1-7.
  11. 11. A computer readable storage medium, characterized in that the computer readable storage medium comprises a computer program or instructions which, when executed, cause the method of any of claims 1-7 to be implemented.
  12. 12. A computer program product, characterized in that the computer program product comprises a computer program or instructions which, when run, cause the method of any one of claims 1-7 to be implemented.

Description

Wireless channel measurement method and communication device Technical Field The present application relates to the field of communications, and in particular, to a wireless channel measurement method and a communication device. Background During communication, the network device may transmit a reference signal (CHANNEL STATE information-REFERENCE SIGNAL, CSI-RS) for evaluating downlink channel state information to a User Equipment (UE) so that the UE may perform channel estimation by measuring the CSI-RS and evaluate the quality of a channel, thereby supporting efficient beamforming, link adaptation, network optimization, and the like. However, as the number of antenna ports increases, the number of Resource Elements (REs) occupied by each antenna port in the channel estimation process also increases, which results in an excessively high channel estimation overhead and a reduced data channel resource ratio. Disclosure of Invention The embodiment of the application provides a wireless channel measurement method and a communication device, which can reduce the number of REs occupied by an antenna port in a channel estimation process, reduce the overhead of the channel estimation process and improve the accuracy of channel estimation. In a first aspect, a wireless channel measurement method is provided, where the method may be applied to a network side, for example, a network device or a communication module in the network device, or a circuit or a chip (such as a modem (modem) chip, also called a baseband (baseband) chip, or a system on chip (SoC) chip or a system in package (SYSTEMIN PACKAGE, SIP) chip that includes a modem core) in the network device that is responsible for a communication function. The network device may be a device or apparatus with a chip, or a device or apparatus with an integrated circuit, or a chip, a chip system, a module, or a control unit in the device or apparatus, which is not limited by the present application. In the present application, when referring to a network device, the network device may refer to the network device itself, or may refer to a chip, a functional module, an integrated circuit, or the like that completes the method provided by the present application in the network device, and the present application is not limited specifically. In the first aspect and its possible implementation manners, the method is described as being executed by the network device as an example. The method includes transmitting a first signal through at least one port group. Each port group includes a plurality of antenna ports supporting code division multiplexing. The first signal comprises a plurality of resource elements occupied by at least one port group. The number of the resource particles occupied by the first port group is smaller than the number of the antenna ports in the first port group. The first port group is any one of the at least one port group. Channel parameters for each antenna port in at least one port group are received. The channel parameters of each antenna port in at least one port group are determined by a compressed sensing algorithm and the measurement of the first signal. Based on the scheme, in the channel estimation process, a first signal for channel estimation includes a plurality of REs occupied by one or more port groups. According to the scheme, the RE number occupied by any port group is smaller than the antenna port number in the port group, so that each port group can comprise more antenna ports under the condition that the RE number occupied by each port group is unchanged. Therefore, the channel parameters of more antenna ports can be measured in one channel estimation process, and the efficiency is high. From another perspective, by designing that the number of REs occupied by any port group is smaller than the number of antenna ports in that port group, channel estimation can be achieved with fewer REs, with the number of antenna ports in the port group unchanged. Thus, the resource overhead in the channel estimation process is reduced. In addition, when antenna ports in a future evolution communication system are greatly increased, the number of RE occupied by any port group is designed to be smaller than the number of antenna ports in the port group, so that the number of RE occupied by each antenna port in the channel estimation process is also beneficial to control, and the channel corresponding to RE occupied by each antenna port is controlled to meet the condition of being far smaller than relevant bandwidth and coherence time, so that the accuracy of channel estimation is ensured. In some possible implementations, the wireless channel measurement method provided in the first aspect may also be expressed as dividing antenna ports participating in downlink pilot signal measurement (which may also be referred to as channel estimation) into M port groups by code division multiplexing, where each port group includes N antenna ports supporti