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Method and device for channel state information feedback and receiving

A technology of channel state information and channel information, applied in the field of communication, can solve the problems of low spatial channel quantization accuracy and inability to meet the requirements of channel quantization accuracy, and achieve the effect of improving system performance and improving quantization accuracy

Active Publication Date: 2014-04-02
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 4-antenna codebook based on Householder transform designed with single-user MIMO as the main optimization scenario will not be able to meet the requirements of these advanced transmission technologies for channel quantization accuracy
In addition, the 4-antenna codebook based on the Householder transform is designed for small-pitch linear array scenarios and low-spatial low-correlation scenarios. The spatial channel quantization accuracy of the commonly used small-pitch dual-polarization array scenarios is not high.

Method used

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  • Method and device for channel state information feedback and receiving
  • Method and device for channel state information feedback and receiving

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Embodiment Construction

[0029] The embodiment of the present invention uses some elements of the 8-antenna precoding matrix to obtain a 4-antenna precoding matrix, and notifies the opposite end of the 4-antenna precoding matrix that should be used through channel state information feedback, so that the 4-antenna precoding matrix is ​​used for signal processing. deal with. Since the 4-antenna precoding matrix in the embodiment of the present invention has the characteristics of the 8-antenna precoding matrix, the quantization accuracy of the channel can be effectively improved, thereby improving system performance.

[0030] see figure 1 , the main method flow of channel state information feedback in this embodiment is as follows:

[0031] Step 101: Select a precoding matrix according to estimated channel information; the precoding matrix is ​​a 4-antenna precoding matrix composed of some elements of an 8-antenna precoding matrix.

[0032] Step 102: Send index information corresponding to the selecte...

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Abstract

The invention discloses a method for channel state information feedback and receiving. The method is used for realizing informing an opposite terminal of a precoding matrix to be adopted through channel state information feedback, so that the indicated precoding matrix can be used for carrying out signal processing, and the spatial channel quantization precision can be further improved. The method comprises the following steps: selecting the precoding matrix according to estimated channel information, wherein the precoding matrix is a 4-antenna precoding matrix composed of partial elements in a 8-antenna precoding matrix; and sending index information corresponding to the selected precoding matrix. The invention also discloses a device which is used for realizing the method.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for channel state information feedback and reception. Background technique [0002] At present, the multi-antenna technology of the physical layer has become one of the key technologies of the next generation wireless communication system. Multi-antenna technology has many advantages. For example, the multiplexing gain of multiple antennas can be used to improve the throughput of the system, and the diversity gain of multiple antennas can be used to improve system performance, or the directional gain of antennas can be used to distinguish receiving terminals and eliminate reception. Interference between terminals and so on. [0003] The existing 4-antenna codebook is a codebook based on the Householder (Householder) transform, and the codebook is designed for small-pitch linear array scenarios and low spatial correlation scenarios. In addition, the codebook takes s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04L1/00H04L1/06
Inventor 荆梅芳丁昱苏昕张然然拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD
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