多径衰落信道MPSK信号超指数迭代盲解调算法

为了提高多径衰落信道下的盲解调性能，提出了一种结构简单的MPSK信号盲解调算法。首先利用超指数迭代分数间隔盲均衡器实现联合定时同步与均衡，然后对均衡器输出信号进行非线性变换实现载波频偏的估计，最后利用二阶数字判决锁相环跟踪相位变化纠正剩余频偏和相偏。仿真结果表明，在多径衰落信道条件下，与现有算法相比，基于超指数迭代分数间隔盲均衡器的盲解调算法实现简单，误码率低，而且具有收敛速度快、性能稳定等优点。

Blind demodulation of MPSK signals in multipath fading channels based on SEI-FSE-CMA

To improve the performance of blind demodulation in multipath fading channels, a simple blind demodulation algorithm of Multiple Phase Shift Keying(MPSK) signals is proposed. The blind super-exponential iteration fractionally-spaced equalizer is introduced to achieve the time-recovery and equalization firstly. Then the carrier-frequency offset is estimated by nonlinear transformation. Finally, the second-order digital phase-locked loop is exploited to track the phase offset. Simulation results show that the algorithm exhibits lower bit error rate(BER), fast convergence speed and great stability in multipath fading channels.