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Method, device and system for selecting precoding matrix instructions

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

Active Publication Date: 2014-03-19
HUAWEI TECH CO LTD
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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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  • Method, device and system for selecting precoding matrix instructions
  • Method, device and system for selecting precoding matrix instructions
  • Method, device and system for selecting precoding matrix instructions

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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

The invention provides a method, a device and a system for selecting precoding matrix instructions. The method, the device and the system are used to solve the problem in the prior art that as PMI selection is not accurate, the performance of a system decreases ultimately. According to the technical scheme, a base station sends instruction information to a terminal to instruct the terminal to send uplink data without weighting or with unit matrix weighting, and the base station selects a suitable PMI from a PMI collection according to the uplink data sent from 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 Applications(China)
IPC IPC(8): H04L1/00H04L1/06
CPCH04B7/0456H04B7/0617H04B7/0639
Inventor 张华炜张劲林
Owner HUAWEI TECH CO LTD
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