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Method, device and system for determining precoding matrix

A precoding matrix and terminal equipment technology, applied in the field of communication, can solve problems such as the inability to improve spectrum efficiency

Active Publication Date: 2022-02-25
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] However, in this scheme, in the channel environment with a large direct line-of-sight component, the MIMO channel degenerates into a single input single output (SISO) channel, that is, the MIMO channel can only support single-stream signal transmission, Unable to use space division multiplexing to improve spectrum efficiency

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  • Method, device and system for determining precoding matrix
  • Method, device and system for determining precoding matrix
  • Method, device and system for determining precoding matrix

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Embodiment Construction

[0049] In order to facilitate understanding of the technical solutions of the embodiments of the present application, a brief introduction of relevant technologies or terms of the present application is given as follows.

[0050] First, the channel quality acquisition method.

[0051] For downlink transmission, the network device first sends a channel state information reference signal (CSI-RS) to the terminal device, and the terminal device performs channel measurement according to the CSI-RS to obtain the channel state information (CSI) of the downlink channel , and send a CSI report to the network device, the CSI report may include, for example, a channel quality indicator (channel quality indicator, CQI), a rank indicator (rank indicator, RI), a precoding matrix indicator (precoding matrix indicator, PMI), etc., the network After receiving the CSI report reported by the terminal device, the device uses the precoding matrix indicated by the PMI in the CSI report or other pr...

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Abstract

A method, device and system for determining a precoding matrix can improve the performance of traditional MIMO and increase the spectral efficiency. In this method, the receiving end device obtains the CSI of the first channel and the information of the P antenna port groups of the transmitting end device, and then determines V OAM mode groups according to the CSI of the first channel and the first OAM mode, and then determines V OAM mode groups. The first precoding matrix is ​​determined according to the P antenna port groups and the V OAM modal groups of the transmitting end device, and finally the first indication information for indicating the first precoding matrix is ​​sent to the transmitting end device; the transmitting end device receives the first precoding matrix. indication information, and determine the first precoding matrix according to the first indication information. Wherein, P is a positive integer, V is a positive integer less than or equal to P, the first OAM mode is an OAM mode supported by both the transmitting-end device and the receiving-end device, and the first precoding matrix includes P*V second precoding encoding matrix.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method, device and system for determining a precoding matrix. Background technique [0002] In the fifth generation (5th generation, 5G) network, multiple input multiple output (MIMO) technology is widely used. MIMO technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end respectively, so that data Transmit and receive via multiple antennas at the transmitter and receiver. [0003] In the traditional data transmission scheme based on MIMO technology, the sending end device obtains the channel state information (channel state information, CSI) of the channel by means of channel detection, and then when sending data, it can determine the precoding matrix according to the CSI of the channel, through The precoding matrix maps different transmission layers to different antenna ports, and f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0626
Inventor 祝倩吕艺倪锐
Owner HUAWEI TECH CO LTD
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