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System and method for channel information feedback in a wireless communications system

A communication channel and channel statistics technology, applied in the field of systems and methods for channel information feedback in wireless communication systems, can solve problems such as consuming communication system bandwidth, reduce feedback information overhead, improve overall communication performance, and improve overall Effects on communication system performance

Active Publication Date: 2012-02-01
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since CSI feedback consumes communication system bandwidth, the amount of information fed back to the transmitter needs to be minimized

Method used

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  • System and method for channel information feedback in a wireless communications system
  • System and method for channel information feedback in a wireless communications system
  • System and method for channel information feedback in a wireless communications system

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Embodiment Construction

[0038] The making and using of the embodiments are discussed in detail below. It should be appreciated that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the full scope of the invention.

[0039] The embodiments will be described in a specific context, namely a wireless communication system compatible with the Third Generation Partnership Project (3GPP) Long Term Evolution (LTE). However, the present invention can also be applied to other wireless communication systems, for example, wireless communication systems compatible with technical standards such as LTE-Advanced (LTE-A), WiMAX, etc., which can use feedback information to improve communication system performance. These embodiments are applicable to single-user multiple-input, multiple-output (SU-MIMO) and multi-user mu...

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Abstract

A system and method for channel information feedback in a wireless communications system is provided. A method for communications device operation includes receiving a pilot transmitted by a controller, computing a channel estimate for a channel between the controller and a communications device, the computing based on the pilot, computing a channel correlation matrix for the channel based on the channel estimate, and transmitting a reduced rank representation of the channel correlation matrix to the controller as a first feedback information. The method also includes adapting a first codebook based on the reduced rank representation of the channel correlation matrix, computing a representation of the channel using the adapted codebook, transmitting the representation of the channel as a second feedback information, and receiving a transmission beamformed based on the first feedback information and the second feedback information.

Description

[0001] The present invention claims the prior application priority of the following application: the title of the invention submitted on March 12, 2009 is "Method and Apparatus for Feeding Back Channel Correlation Information" (Method and Apparatus for Feeding Back Channel Correlation Information in Wireless Communication System) in Wireless Communications Systems) U.S. Application No. 61 / 159,689; the title of the invention submitted on March 21, 2009 is "System and Method for Adaptive Codebook Designs for Multi-User MIMO" (System and Method for Adaptive Codebook Designs for Multiuser MIMO) U.S. Application No. 61 / 162,591; and U.S. Application No. 61 / 234,113 filed on August 14, 2009 entitled "Adaptive Feedback for MIMO Communications" (Adaptive Feedback for MIMO Communications), these The content of the earlier application is incorporated herein by reference. technical field [0002] The present invention relates generally to wireless communications, and more particularly to s...

Claims

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Application Information

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IPC IPC(8): H04W24/00
CPCH04L1/06H04L1/0029H04L25/0224H04B7/065H04B7/0434H04B7/0417H04L25/0204H04B7/0663H04L1/0026H04L25/0391H04B7/0626H04B7/043H04B7/0478H04B7/0482H04B7/0639H04L25/021
Inventor 夏鹏飞唐扬容志刚陈林红
Owner HUAWEI TECH CO LTD
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