关键词: 协作分集, 信道编码, 网络编码, 中断率, 误码率, 信噪比

Abstract:

As for the conventional multiple-access relay cooperation scheme, the coding gain is limited and users cannot assist each other. In order to solve these problems, a novel cooperative scheme based on network and channel coding is proposed. In this scheme, the coding redundancy of different users is simultaneously forwarded through network coding at the relay node, and, once the codes of one user are correctly decoded at the destination, the coding redundancy of other users can be retrieved. The approximations of outage probability and bit error rate of the proposed scheme are then deduced by analyzing the error event probability. Simulation results show that the proposed scheme is of better performance than the coded cooperation scheme in terms of outage probability and bit error rate when the signal to noise ratio （SNR） is getting higher, and that the performance of the user with low SNR can be improved with the help of the user with high SNR.

Key words: cooperative diversity, channel coding, network coding, outage probability, bit error rate, signal to noise ratio