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A channel measurement method and communication device

A channel measurement and communication unit technology, which is applied in wireless communication, channel estimation, transmission path sub-channel allocation, etc., and can solve problems such as large feedback overhead

Active Publication Date: 2021-06-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this feedback method brings a large feedback overhead

Method used

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  • A channel measurement method and communication device
  • A channel measurement method and communication device
  • A channel measurement method and communication device

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Experimental program
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Embodiment Construction

[0082] The technical solution in this application will be described below with reference to the accompanying drawings.

[0083] 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 telecommunications system (universal mobile telecommunications system, UMTS), worldwide interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, fifth generation (5th generation, 5G) system or new wireless ( NR) and...

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Abstract

The present application provides a channel measurement method and a communication device. The method includes: a terminal device receives a precoded reference signal, the precoded reference signal is obtained by precoding the reference signal based on K angle vectors and L delay vectors; generating and sending first indication information, the first indication information is used To indicate the P weighting coefficients corresponding to the P angular delay pairs, the P weighting coefficients are determined by the precoding reference signal, the P angular delay pairs and their corresponding P weighting coefficients are used to determine the precoding matrix, Each angle-delay pair includes one angle vector among the K angle vectors and one delay vector among the L time-delay vectors. The K angle vectors and L time delay vectors are determined based on uplink channel measurement. Utilizing the reciprocity of the uplink and downlink channels, the downlink reference signal is precoded based on the angle and vector determined by the uplink channel measurement, and the terminal device can only feed back the weight coefficients used to construct the precoding matrix, reducing the feedback overhead.

Description

technical field [0001] The present application relates to the field of wireless communication, and more specifically, relates to a channel measurement method and a communication device. Background technique [0002] In massive multiple-input multiple-output (Massive MIMO) technology, network equipment can reduce the interference between multiple users and the interference between multiple signal streams of the same user through precoding, which is beneficial to Improve signal quality, realize space division multiplexing, and improve spectrum utilization. [0003] For example, the terminal device may determine the precoding matrix based on downlink channel measurement, and hopes to enable the network device to obtain a precoding matrix that is the same as or similar to the precoding matrix determined by the terminal device through feedback. Specifically, the terminal device may, for example, indicate the precoding matrix by feeding back one or more beam vectors and their wei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/309H04B7/0413H04B7/0456H04L5/00H04W72/04
CPCH04B17/309H04B7/0413H04B7/0456H04L5/0048H04W72/046H04B7/0421H04L5/0023H04L25/0226H04L25/03343H04L25/0202H04W72/23
Inventor 种稚萌金黄平尹海帆毕晓艳范利
Owner HUAWEI TECH CO LTD