Research On The Relay Cooperation Transmission Scheme And Performance

Cooperation communication technology as a new type of wireless transmission technologywith the advantage of diversity technology and relay transmission technology, can obtain theperformance gain of multi-antenna and multi-hop transmission in the traditional communicationnetwork without increasing the number of antenna. It makes single-antenna users tocommunicate with sharing limited resources through a cooperative way to improve systemperformance. It is one of the key technologies in the future wireless communications in improvingspectrum efficiency with great development potential.This thesis focuses on collaborative transmission scheme and its performance, and the maincontent of the paper are as follows：1. Main study focuses on the performance of different cooperative relaying scheme incooperative communication system. These cooperative relaying schemes includeamplify-and-forward (AF) relay, decode-and-forward (DF) relaying, coded cooperation (CC)relay and two kinds of adaptive cooperative scheme. The comparison in the properties ofdifferent cooperation schemes and the outage probability of them is studied.2. In view the Advantages and disadvantages of the different collaboration protocols, acollaboration hybrid transmission scheme is proposed. Combined HARQ technology withcooperative communication technology, the relay node selects different cooperative waysaccording to the decoding of received data to complete the cooperative communication. By theanalysis and simulation show that the transmission scheme of the proposed hybrid collaborationcan get a higher system performance than that of the General coding collaboration.3. Combined with HARQ technology, a selected decoding cooperation model withnetwork coding technology is proposed. It is realized with the selective DF cooperation protocolby setting a specific bit-error rate in the relay node and the combination of network codedtechnology. Through the analysis of the simulation, the results show that the proposed selectiondecoding network coded cooperation model effectively improves the system performance underpoor channel condition.