A method of indicating and determining precoding vector and communication device

A precoding vector and precoding technology, applied in polarization/direction diversity, diversity/multi-antenna systems, space transmit diversity and other directions, can solve problems such as large feedback overhead, and achieve the effect of reducing feedback overhead and ensuring approximate accuracy.

Active Publication Date: 2020-02-28
HUAWEI TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the terminal device performs wideband feedback and subband feedback as described above on a per-transport layer basis, it may bring a large feedback overhead

Method used

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  • A method of indicating and determining precoding vector and communication device
  • A method of indicating and determining precoding vector and communication device
  • A method of indicating and determining precoding vector and communication device

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Embodiment Construction

[0099] The technical solution in this application will be described below with reference to the accompanying drawings.

[0100] 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 invention provides a method for indicating and determining a precoding vector and a communication device. The method comprises the following steps: the terminal equipment generates and sends indication information to the network equipment; wherein the indication information is used for indicating one or more port selection vectors, one or more frequency domain vectors and one or more linear superposition coefficients, and each linear superposition coefficient corresponds to one port selection vector and one frequency domain vector; or the indication information is used for indicating one or more space-frequency vectors and the linear superposition coefficient of each space-frequency vector; wherein the space-frequency vector is a Kronecker product of a port selection vector and a frequency domain vector, each port selection vector indicates a port of a reference signal, the reference signal is a precoding reference signal, and each frequency domain vector indicates a change rule ofa channel in a frequency domain. The network device determines a precoding vector based on the indication information. Change of a channel in a frequency domain is simulated through linear superposition of frequency domain vectors, and feedback overhead can be reduced.

Description

technical field [0001] The present application relates to the field of wireless communication, and more specifically, to a method for indicating and determining a precoding matrix and a communication device. Background technique [0002] In massive multiple-input multiple-output (Massive MIMO) technology, the interference between multiple users and the interference between multiple signal streams of the same user can be reduced by precoding, which is beneficial to improve the signal quality, realize space division multiplexing, and improve spectrum utilization. [0003] Currently, a method for feeding back a precoding matrix is ​​known. The terminal device can perform channel measurement according to a received reference signal, determine an ideal precoding matrix, and feed back to the network device through a precoding matrix indicator (PMI). Wherein, the reference signal received by the terminal device may be a precoded reference signal, and may be called a beamformed (be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0619H04B7/0469H04B7/10
Inventor 金黄平王潇涵尹海帆尚鹏毕晓艳
Owner HUAWEI TECH CO LTD
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