A channel measurement method and communication device

A channel measurement and vector technology, applied in transmission path sub-channel allocation, signaling allocation, pilot signal allocation, etc., can solve the problem of large feedback overhead

Active Publication Date: 2021-07-16
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, terminal devices need to select ports based on each subband feedback, and the feedback overhead is large

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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Embodiment Construction

[0087] The technical solution in this application will be described below with reference to the accompanying drawings.

[0088] 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 channel measurement method and a communication device. The method includes: the terminal device generates and sends first indication information to the network device, the first indication information is determined based on the received precoding reference signals of P ports, and is used to indicate Q ports among the P ports; The P ports correspond to P angle delay pairs, each angle delay pair includes an angle vector and a delay vector, and the precoding reference signal of each port in the P ports is based on an angle vector and a time delay vector. The delay vector is obtained by precoding the reference signal; the Q ports correspond to the Q angle delay pairs among the P angle delay pairs. The reference signal is precoded through the delay vector, and the change of the channel in the frequency domain can be represented by the linear superposition of multiple delay vectors. The terminal device only needs to feed back the selected delay vector to the network device without having to Based on separate feedback on each frequency domain unit, feedback overhead can be 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] A channel measurement method is currently known. The network device can precode the reference signal based on multiple beam vectors, and send the precoded reference signals of multiple ports to the terminal device, so that the terminal device can use the precoded The reference signal is used for channel measurement. Based on the channel measurement, the terminal device may select some ports from the multiple ports...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/0456H04L5/00
CPCH04B7/0413H04B7/0456H04L5/0053H04B7/10H04B7/0469H04L5/0048H04L5/0023H04B7/0639H04B7/0417
Inventor 尹海帆金黄平葛士斌毕晓艳
Owner HUAWEI TECH CO LTD
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