Relay collaboration communication method capable of obtaining multi-ordered diversity

Abstract

The invention discloses a relay cooperation communication method for acquiring a multi-stage diversity in the radio communication field and aims at solving the problem that most of schemes acquire low diversity gain in the prior relay cooperation communication. The detailed steps are as follows: a message of a t time is coded and is sent by an original node in a broadcasting manner; the decoding is conducted by the relay node after a relay node receives the signal which is sent by the original node on the t time; and a decoding message is sent to a relay node storing device; the combination coding of a network and a channel is conducted on all messages of the storing device of the relay node by the relay node, thereby enabling the messages of the original node which are received on the present time and the former N times by the relay node to be forwarded simultaneously to a target node; a biggest likelihood iteration decoding is adopted by the target node; and the posterior probability of a decoding message is sent to a storing device of posterior probability. The invention has the advantages of improving diversity gain under the condition of adding relay forwarding times, and being applicable to the radio relay cooperation communication.

Description

technical field [0001] The design of the invention belongs to the field of wireless communication, relates to relay information forwarding of network channel coding, in particular to a relay cooperative communication method, which is used for a relay communication cooperative network to obtain multi-order diversity gain. Background technique [0002] Wireless communication technology is one of the most important technologies in the information age. With the continuous development of wireless communication technology, people's demand for high-speed data transmission is more urgent, but the wireless frequency band resources are relatively limited, so people try to improve the spectrum utilization rate to achieve higher data transmission rate on the limited frequency band . Multiple-input multiple-output MIMO can greatly improve the capacity of the system, and can overcome the influence of multipath fading of the wireless channel, and provide space diversity. It has been regar...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the diversity gain obtained by most schemes in the current relay cooperative communication is not high, and propose a relay cooperative communication method that can obtain multi-stage diversity, so as to utilize the channel fading independent of each other in different periods in wireless communication. And have the same distribution properties, increase the diversity gain; improve the communication quality of the system

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