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由于无线衰落信道中差分检测Turbo乘积编码调制具有良好的性能,文中研究了相关平坦Rayleigh衰落信道中差分检测Turbo乘积编码MDPSK信号的等增益分集,这种等增益分集接收无需任何信道状态信息。研究结果表明,等增益合并可以改善快衰落信道中TPC-MDPSK的错误平底效应,等增益分集合并的Turbo乘积编码的MDPSK信号在相关系数为0.5的平坦Rayleigh衰落信道中的性能和独立衰落信道中的系统性能相差仅1dB。
Because of the good performance of differential detection Turbo product code modulation in wireless fading channels, equal gain diversity of differential detection Turbo product coded MDPSK signals in correlated flat Rayleigh fading channels is studied in this paper. This kind of equal gain reception does not need any channel state information. The results show that equal gain combination can improve the false flat-bottom effect of TPC-MDPSK in fast fading channel. Equal-gain diversity combined Turbo-product coded MDPSK signal has good performance in flat Rayleigh fading channel with correlation coefficient of 0.5 and independent fading channel The system performance difference of only 1dB.