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A coefficient indication method and communication device for constructing a precoding matrix

A technology of precoding matrix and indicating information, applied in the field of communication, can solve problems such as inability to accurately obtain information, affect system transmission performance, and inability to accurately estimate CSI report overhead

Active Publication Date: 2021-06-08
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the network device cannot know in advance what information the terminal device reports, it may not be able to accurately estimate the cost of the second part of the CSI report, and it will not be able to decode it correctly.
Therefore, network devices may not be able to accurately obtain the information in the CSI report, thus affecting system transmission performance

Method used

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  • A coefficient indication method and communication device for constructing a precoding matrix
  • A coefficient indication method and communication device for constructing a precoding matrix
  • A coefficient indication method and communication device for constructing a precoding matrix

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Embodiment Construction

[0065] The technical solution in this application will be described below with reference to the accompanying drawings.

[0066] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: global system for mobile communications (GSM) system, code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long termevolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunication system (universal mobile telecommunication system, UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, future fifth generation (5th generation, 5G) system or new Wireless (new ra...

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Abstract

The present application provides a coefficient indication method and a communication device for constructing a precoding matrix. The method includes: a terminal device generates and sends a CSI report to a network device. The CSI report includes K 1 The quantization information of weighting coefficients and the first indication information; the K 1 weighting coefficients are used to construct a precoding matrix corresponding to one or more frequency domain units; the first indication information is used to indicate the K 1 Whether the weighting coefficients are the number K reported by the terminal device based on the pre-configured weighting coefficients 0 Determined weighting coefficients for all non-zero magnitudes, K 1 ≤ K 0 , K 0 and K 1 All are positive integers. Based on the above method, the network device can estimate the length of the second part according to the predefined CSI report format and the first part, and then correctly decode the CSI report, which is conducive to improving system transmission performance.

Description

technical field [0001] The present application relates to the communication field, and more specifically, relates to a coefficient indicating method and a communication device for constructing a precoding matrix. Background technique [0002] In a massive multiple-input multiple output (Massive MIMO) technology, a network device may reduce interference between multiple users and interference between multiple signal streams of the same user through a precoding technology. Thereby improving signal quality, realizing space division multiplexing, and improving spectrum utilization. [0003] The terminal device may determine the precoding vector through channel measurement, etc., and hopes to make the network device obtain a precoding vector that is the same as or similar to the precoding vector determined by the terminal device through feedback. In order to obtain higher feedback accuracy, the terminal device may fit the precoding vector determined through channel measurement i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/0456H04B7/06
CPCH04B7/0413H04B7/0456H04B7/0626H04B7/06
Inventor 王潇涵金黄平毕晓艳
Owner HUAWEI TECH CO LTD