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Relay cooperative communication system information transmission method under feedback limitation

A system information and transmission method technology, applied in the field of wireless communication, can solve the problems of large feedback overhead and occupied frequency band resources, etc.

Active Publication Date: 2018-11-06
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a relay cooperative communication system information transmission method under limited feedback, and solve the technical problems in the prior art that the relay transmission process has a large feedback overhead and occupies more frequency band resources

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  • Relay cooperative communication system information transmission method under feedback limitation
  • Relay cooperative communication system information transmission method under feedback limitation
  • Relay cooperative communication system information transmission method under feedback limitation

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Embodiment Construction

[0058] In the information transmission method of relay cooperative communication system under limited feedback provided by the present invention, firstly, the source node sends information to multiple relay nodes, and then the relay nodes decode the received information, and precode the decoded information forwarded to the destination node. Relay node precoding needs to obtain channel state information. For this purpose, the node first performs channel estimation, quantizes and feeds back the estimated channel state information to the relay node. The invention significantly improves the effective capacity of wireless relay transmission by seeking the best channel feedback quantization bits.

[0059] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

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Abstract

The invention discloses a relay cooperative communication system information transmission method under feedback limitation. The method comprises the steps that a source node sends information to relaynodes, and the relay nodes decode received information, pre-codes decoded information according to channel state information fed back by a destination node, maximizes a received signal to noise ratioof the destination node, and calculates precoding channel transmission capacity; the destination node carries out channel estimation to obtain channel state information, quantizes the channel state information, feeds back the information to the relay nodes and calculates feedback channel transmission capacity; and the difference between the precoding channel transmission capacity and the feedbackchannel transmission capacity is defined as effective capacity, the optimum feedback channel quantization bit is sought with the purpose of maximizing the effective capacity, and the pre-coded information is forwarded to the destination node. According to the method, through seeking of the optimum feedback channel quantization bit, the effective capacity of wireless relay transmission is remarkably improved.

Description

technical field [0001] The invention relates to an information transmission method of a relay cooperative communication system under limited feedback, and belongs to the technical field of wireless communication. Background technique [0002] In wireless communication systems, cooperative relay technology has the function of low cost and expanding coverage, and can effectively improve the reliability and transmission rate of the communication system. Relay precoding is necessary to use relay technology. Relay precoding can effectively improve the channel capacity of the communication system, while using relay precoding needs to obtain channel state information. The higher the accuracy of channel state information, the obtained channel The larger the capacity, however, in the existing acquisition method, while obtaining the accuracy of channel state information, it will inevitably occupy more frequency band resources due to excessive feedback overhead, which puts forward high...

Claims

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Application Information

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IPC IPC(8): H04B7/026H04B7/024H04B7/0456
CPCH04B7/024H04B7/026H04B7/0456
Inventor 朱佳姚颖邹玉龙吴彤郭海燕
Owner NANJING UNIV OF POSTS & TELECOMM
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