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A method, device and system for selecting a precoding matrix indication

A precoding matrix and indication technology, applied in the field of communication, can solve the problems of inaccurate selection and system performance degradation, and achieve the effect of improving accuracy and performance gain.

Active Publication Date: 2017-06-13
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a method, device, and system for selecting a precoding matrix indication to solve the problem in the prior art that PMI selection is inaccurate, leading to system performance degradation

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  • A method, device and system for selecting a precoding matrix indication
  • A method, device and system for selecting a precoding matrix indication
  • A method, device and system for selecting a precoding matrix indication

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0055] At present, PMI selection is based on sounding measurement. Whether the terminal supports sounding transmission, sounding measurement period, or frequency band resources will affect the accuracy of PMI selection, thereby affecting the performance gain of SU-MIMO. To this end, the following embodiments provide a method for selecting PMI without relying on sounding. The base station can actively initiate PMI selection when needed without relying on the sounding...

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Abstract

Embodiments of the present invent provide a method for selecting a precoding matrix indication, an apparatus and a system, which are applied to the communications field and used to solve a problem in the prior art where PMI selection is inaccurate and this inaccuracy finally causes deterioration of system performance. The technical solution provided by the present invention includes: a base station sends indication information to a terminal to instruct the terminal to send uplink data without weighting the uplink data or after weighting the uplink data by using an identity matrix; the base station selects a proper PMI from a PMI set according to the uplink data sent by the terminal and sends the PMI to the terminal.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for selecting a precoding matrix indication. Background technique [0002] Uplink SU-MIMO (Single User Multiple Input Multiple Output, Single User Multiple Input Multiple Output) transmission can achieve the purpose of improving transmission performance by selecting a suitable PMI (Precoding Matrix Indication, precoding matrix indication). [0003] The base station receives the sounding signal periodically sent by the terminal. After receiving the sounding signal, it analyzes the sounding signal through the pilot signal to obtain the channel response. According to the PMI selection criteria, it performs data processing on the obtained channel response. From the alternative An appropriate PMI is selected from the PMI set, and the selected PMI is delivered to the terminal through a PDCCH (Physical Downlink Control Channel, physical downlink control chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/06
CPCH04B7/0456H04B7/0617H04B7/0639
Inventor 张华炜张劲林
Owner HUAWEI TECH CO LTD