论文部分内容阅读
信道估计误差是引起无线通信系统性能衰弱的重要因素之一。分析了瑞利信道条件下估计误差对译码前传协作系统性能的影响。推导并给出了估计误差条件下正交幅度调制信号译码前传协作系统码元错误概率的解析表达式和上界表达式,并分析了不同信道的方差对协作系统性能的影响。仿真结果显示,存在估计误差时,码元错误概率性能并未随着信噪比的增大而提高。同时发现,中继-目的链路的较大方差较源-中继链路显著改善码元错误概率性能。
Channel estimation error is one of the important factors that cause the performance degradation of wireless communication system. The influence of estimation error under Rayleigh channel on the performance of coding prequel collaboration system is analyzed. The analytical expression and the upper bound expression of the symbol error probability of the orthogonally amplitude modulated signal decoding cooperative system are deduced and given, and the influence of variance of different channels on the performance of the cooperative system is analyzed. The simulation results show that when there is estimation error, the error probability of symbol error does not increase with the increase of signal-to-noise ratio. At the same time, it is found that the larger variance of relay-destination link can significantly improve the symbol error probability performance than the source-relay link.