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Channel measurement method and communication device

A channel measurement and communication unit technology, which is applied in transmission path sub-channel allocation, signaling allocation, pilot signal allocation, etc., can solve problems such as large feedback overhead, reduce pilot overhead, simplify the channel measurement process, reduce The effect of feedback overhead

Active Publication Date: 2020-06-26
HUAWEI TECH CO LTD
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  • Abstract
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  • 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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  • Channel measurement method and communication device
  • Channel measurement method and communication device
  • Channel measurement method and communication device

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Embodiment Construction

[0101] The technical solution in this application will be described below with reference to the accompanying drawings.

[0102] 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 invention provides a channel measurement method and a communication device. The method comprises the following steps that a terminal equipment receives a pre-coding reference signal from a networkequipment, wherein the pre-coding reference signal is obtained by pre-coding the reference signal on the basis of K angle vectors; first indication information is generated and sent, wherein the first indication information is used for indicating P weighting coefficients corresponding to P angle time delay pairs; the P weighting coefficients are determined by the precoding reference signal; eachangle time delay pair in the P angle time delay pairs comprises an angle vector and a time delay vector corresponding to the angle vector, the time delay vector corresponding to each angle vector is pre-configured, and each angle vector and the time delay vector corresponding to each angle vector are obtained based on uplink channel measurement; the P angle time delay pairs and the corresponding Pweighting coefficients are used for determining a precoding matrix. By utilizing the reciprocity of the uplink and downlink channels, the terminal equipment can only feed back the weighting coefficient for constructing the precoding matrix, so that the feedback expense is reduced.

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 Applications(China)
IPC IPC(8): H04B17/309H04L12/26H04B7/0456H04B7/0413H04L5/00
CPCH04B17/309H04L43/0852H04B7/0456H04B7/0413H04L5/0048H04L5/0053H04L5/0023H04L5/0094H04L5/0055H04B17/364H04B7/0695H04B7/088H04B7/10H04L25/0224H04W72/23
Inventor 金黄平种稚萌尹海帆毕晓艳
Owner HUAWEI TECH CO LTD
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