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针对协作通信网络中的信道时变特性,以系统错误概率为准则,设计了一种新的系统方案.根据编码函数,对不同信道上的发送信号选择具有最佳汉明距离的纠错码进行保护,使系统错误概率最小.在此基础上,采用时变功率分配算法对信源节点和中继节点的发送功率进行优化分配.理论分析及仿真结果表明,该方案可使帧错误性能改善0.7dB.
Aiming at the channel time-varying characteristic in cooperative communication network, a new system scheme is designed according to the system error probability.According to the coding function, the error-correcting codes with the best Hamming distance are selected for the transmission signals on different channels Protection and minimize the system error probability.On this basis, the time-varying power allocation algorithm is used to optimize the transmission power of the source node and the relay node.Theoretical analysis and simulation results show that this scheme can improve the frame error performance by 0.7 dB.