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为了优化多节点放大转发协作通信系统的性能,对系统误符号率(SER)进行了深入研究,提出一种在高、低信噪比(SNR)情况下均紧于理论值的SER下界.在满足SER最小准则情况下,以下界为依据,提出适用于多节点协作通信系统最优功率分配与协作伙伴选择方案.在系统总功率受限情况下,基于该方案的SER性能明显优于基于平均功率分配方案的性能.与现有功率分配方案相比,在低SNR情况下,基于该方案的SER性能较紧于理论值.同时,该方案实现了协作伙伴选择功能.
In order to optimize the performance of multi-node amplification and forwarding cooperative communication system, the system symbol error rate (SER) was studied in depth and a SER lower bound to the theoretical value at both high SNR and low SNR was proposed. When SER minimum criterion is satisfied, the optimal power allocation and cooperative partner selection scheme for multi-node cooperative communication system is proposed based on the following conditions: Under the condition of total system power limitation, SER performance based on this scheme is obviously better than that based on average Performance of Power Allocation Scheme The SER performance based on this scheme is less critical than the existing power distribution scheme at low SNR, and at the same time, this scheme enables the cooperation partner selection function.