Emission weighting method and apparatus for CSI feedback system

A feedback system and feedback information technology, applied in the field of communication, can solve problems such as inaccurate operation results and errors in reported information, and achieve the effects of reducing errors, accurate results, and avoiding interference in user equipment

Active Publication Date: 2016-02-17
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a transmission weighting method and device for a CSI feedback system to solve the technical problem of inaccurate operation results caused by errors in the reported information obtained on the network side

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  • Emission weighting method and apparatus for CSI feedback system
  • Emission weighting method and apparatus for CSI feedback system
  • Emission weighting method and apparatus for CSI feedback system

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Embodiment Construction

[0041] The transmission weighting method for the CSI feedback system in the embodiment of the present invention may include: receiving feedback information reported by the user equipment UE, where the feedback information includes at least one of a precoding matrix indication PMI, a channel quality indicator CQI, and a rank indication RI ; Correct and preprocess the feedback information according to the statistical characteristics of the feedback information to obtain an estimated value of real CSI; the real CSI is a matrix obtained according to the real downlink channel matrix; obtain a beam according to the estimated value of the real CSI The forming matrix is ​​used to process the transmit signal by using the beamforming matrix, and send the processed transmit signal to the receiving end.

[0042] In the embodiment of the present invention, after obtaining the feedback information reported by the UE, the feedback information should be corrected and preprocessed to obtain the...

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Abstract

The invention discloses an emission weighting method for a channel state information (CSI) feedback system, wherein the method is used for improving accuracy of precoding of an emission terminal. The method comprises: feedback information reported by user equipment (UE) is received, wherein the feedback information contains at least one of a precoding matrix indicator (PMI), a channel quality indicator (CQI), and a rank indicator (RI); according to a statistical characteristic of the feedback information, correction pretreatment is carried out on the feedback information, thereby obtaining an estimation value of real CSI, wherein the real CSI is a matrix that is obtained based on a downlink real channel matrix; and a beam forming matrix is obtained based on an estimation value of the real CSI, an emission signal is processed by using the beam forming matrix, and the processed emission signal is sent to a receiving terminal. In addition, the invention also discloses a corresponding apparatus.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a transmission weighting method and device for a CSI feedback system. Background technique [0002] In the FDD (Frequency Division Duplexing, frequency division duplexing) system, the UE (User Equipment, user equipment) will report CSI (ChannelState Information, channel state information) to the network side, and the network side will perform the downlink channel corresponding to the UE according to the CSI reported by the UE. Transmission weighting and adaptive modulation and coding operations. That is, the network side sends a pilot signal to the UE. For example, in an LTE (LongTerm Evolution, long-term evolution) system, the network side sends a CSI-RS (ChannelStateInformation-ReferenceSignal, Channel State Information Measurement Pilot) to the UE, and the UE estimates the CSI accordingly. , and then the UE reports CSI quantization information to the network si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/16
CPCH04L1/00H04B7/04
Inventor 徐剑标
Owner HUAWEI TECH CO LTD
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