Implementation method of cooperative transmission mechanism based on feedback information

A technology of feedback information and cooperative transmission, applied in the field of communication, can solve problems such as the decline in spectral efficiency of cooperative transmission, achieve the effects of improving essential defects, improving error performance, and avoiding waste of resources

Inactive Publication Date: 2015-05-27
XIAN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for implementing a cooperative transmission mechanism based on feedback information, which aims to improve the essential defect of the reduced spectral efficiency of cooperative transmission, and improve the spectral efficiency and error performance of cooperative transmission

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  • Implementation method of cooperative transmission mechanism based on feedback information
  • Implementation method of cooperative transmission mechanism based on feedback information
  • Implementation method of cooperative transmission mechanism based on feedback information

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[0022] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 As shown, the implementation method of the cooperative transmission mechanism based on feedback information in the embodiment of the present invention includes the following steps:

[0025] Step 1, time slot 1, source S with power P S Broadcast your own information data, the relay and the destination are in the receiving state;

[0026] Step 2, the destination end demodulates the received data of the direct transmission link, and broadc...

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Abstract

The invention discloses an implementation method of a cooperative transmission mechanism based on feedback information. In order to enable a source and a relay in a cooperative communication system to perform better-informed information transmission operation, and to prevent unnecessary information transmitting so as not to waste resources, a target terminal feeds back 2bits information to represent three receiving states, including success, half success and failure, of signals received by a direct transmitting link at the time slot 1, and the source and the relay decide the operation at the next time slot according to the fed back information; moreover, the relay node also can select different relay transfer protocols according to whether the relay node demodulates data successfully or not. According to the invention, compared with a classic cooperative transmission mechanism, the cooperative transmission mechanism provided by the invention has the advantages that on the premise of only needing additional expenditure of 2bits, when the channel variance of the direct transmitting link is only half of that of a relay link, the spectrum efficiency also can respectively reach 120% and 133% of classical AF cooperative transmission and classical DF cooperative transmission, so that intrinsic defects of cooperative transmission are overcome, the spectrum efficiency of cooperative transmission is improved, and the error performance of cooperative transmission is also improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method for realizing a collaborative transmission mechanism based on feedback information. Background technique [0002] Cooperative transmission technology has developed rapidly in recent years. In cooperative transmission, each mobile node can install only one antenna, and by selecting an appropriate partner node (or cooperative node, relay node, etc.) in the wireless network to participate in forwarding messages, the signal transmitted by the source node can The destination node is reached through different attenuation paths, thus forming a virtual multi-antenna system. Cooperative transmission makes it possible to share resources between nodes. In addition to obtaining diversity and multiplexing gains, it may also bring about expansion of coverage and gain in path loss due to the division of transmission paths. [0003] Although the cooperative transmiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
Inventor 庞立华张阳王静马延军
Owner XIAN UNIV OF SCI & TECH
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