Channel information feedback method, terminal, base station and multiple input multiple output system

A technology for channel information feedback and channel information, applied in the field of communication design, can solve the problems of limited channel state information and low feedback gain, and achieve the effect of utilizing feedback gain and fully feedback gain

Active Publication Date: 2010-10-20
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The scheme of evenly allocating the number of feedback bits of channel information adopted in the prior art has limited feedback channel state information and relatively low feedback gain

Method used

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  • Channel information feedback method, terminal, base station and multiple input multiple output system
  • Channel information feedback method, terminal, base station and multiple input multiple output system
  • Channel information feedback method, terminal, base station and multiple input multiple output system

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Embodiment Construction

[0050] 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 making creative efforts belong to the protection scope of the present invention.

[0051] figure 1 It is a schematic diagram of a cooperative MIMO general system model provided by an embodiment of the present invention. Depend on figure 1It can be seen that in a cooperative MIMO system, multiple base stations cooperate to provide communication services for multiple mobile terminals at the same time. When limited bit feedback is used, each terminal needs to feed back multiple channel matrix information (each channel matrix information conta...

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Abstract

The embodiment of the invention discloses a channel information feedback method, which comprises the following steps of: according to channel quality, dynamically allocating channel information feedback bit numbers for each channel; according to the channel information feedback bit numbers dynamically allocated for each channel, determining the capacity of channel state information codebooks of each channel and generating the channel state information codebooks; determining feedback code words in the channel state information codebooks according to channel state information, wherein the feedback code words are used for feeding the channel state information back; and transmitting matching results of the channel information feedback bit numbers and index numbers of the feedback code words, wherein the index numbers are used for identifying the feedback code words. Correspondingly, the embodiment of the invention also discloses an information processing method, a terminal, a base stationand a multiple input multiple output (MIMO) system. Through the technical scheme, the different channel information feedback bit numbers are dynamically allocated for each channel, which more fully utilizes feedback gain.

Description

technical field [0001] The invention relates to the communication field, and in particular relates to a channel information feedback method, a terminal, a base station and a multiple-input multiple-output system. Background technique [0002] Cooperative MIMO (Co-MIMO) technology has been regarded as a key physical layer technology of the IMT-Advanced standard. In a cellular system with global frequency reuse, inter-cell interference has become the main factor limiting the performance of mobile communications, and the basic idea of ​​Co-MIMO is to coordinate the signal transmission of multiple base stations to mitigate inter-cellular interference. In a Co-MIMO system, multiple base stations (BS) will cooperate to provide communication services for multiple terminals (MS) at the same time. [0003] Different from traditional SDMA precoding schemes with limited feedback of channel state information (CSIT) from a single BS sender, an inherent feature of Co-MIMO systems is that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/06H04W16/10H04W88/02H04W88/08
CPCH04B7/0639H04L2025/03808H04L25/0204H04B7/0647H04B7/024H04B7/0417H04L25/0248H04L25/03898H04L25/03949H04B7/0626
Inventor 张弓龙毅何诚程勇黄凯斌刘坚能
Owner HUAWEI TECH CO LTD
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