中文说明：本文研究双跳放大转发中继在时变瑞利衰落信道与微分 M PSK 调制和非相干检测。为"两个符号"检测的情况下，一阶时间序列模型被用于表征级联的信道的时变特性。基于该模型，推导并与模拟结果证实确切位误差率 （BER） 表达式。则得到的表达式显示 BER 息息相关的自相关特性级联型的通道和束缚的错误楼层的存在在高传输功率。为克服遇到的快速衰落的错误平层，接近最佳的"multiplesymbol"差分球形检测 （MSDSD） 也开发了。在不同的衰落情况下的仿真结果说明了 MSDSD 的误差性能。
English Description：
In this paper, differential m-PSK modulation and incoherent detection of double hop amplify and forward relay in time-varying Rayleigh fading channels are studied. The first-order time series model is used to characterize the time-varying characteristics of cascaded channels in the case of two symbol detection. Based on this model, the exact bit error rate (BER) expression is derived and verified by simulation results. The expression shows that BER is closely related to the autocorrelation characteristics of cascaded channels and bound error floors in the presence of high transmission power. In order to overcome the error level of fast fading, a near optimal & quot; multiple symbol & quot; differential sphere detection (msdsd) is also developed. The simulation results under different fading conditions show the error performance of msdsd.