Research On Cooperative Communication System Based On Turbo-network Coding

With the increasing demands on various applications, how to improve the system performancehas become the core issue that researchers widespread concern. Cooperative communication hasmany advantages, which is considered to be the key technology in the future communication. Andnetwork coding can improve the network throughput and transmission efficiency. Meanwhile, thetwo technologies both stress the cooperation between network nodes to transmit data efficiently andreliably. Therefore, combining network coding theory and cooperative communication technologywill further improve the system performance, and thus become a hot research topic.Firstly, Knowledge of cooperative communication system is introduced, including the theory ofcooperative diversity、common diversity technology and merging technology. Then it introduces thecooperative diversity technology, and compares the performance of AF、DF and direct tranmissionstrategy.Secondly, this paper describles the network coding and cooperative network coding, includingworking principle, algorithm and the advantages. Then it introduces an improved Polynomial timealgorithm of network coding by using Floyd algorithm. Then analyse the improved algorithm withthe aspect of bandwidth consumption and load balance. Later on, it introduces the application ofnetwork coding in the one-way and two-way cooperative communication.At last, based on the project Turbo-network coding, this paper describles the collaborationcommunication system:(1) Uni-Directional relaying cooperative telecommunication system basedon Turbo-network coding uses the tranmission mode of DAS system based on network coding.Then make simulation for it and the result shows the new system has better coding performance andrelay node forwarding efficiency is also improved;(2) Bi-Directional relaying cooperativetelecommunication system based on Turbo-network coding uses the tranmission mode ofcooperative telecommunication system based on PNC. Then analyse the channel capacity of thenew system. The simulation result shows: compared with the traditional network coding strategy,when the channel capacity is0.5, the coding gain of joint Turbo-network coding scheme has2db,and has a higher channel capacity.