Blind Demodulation of MPSK Signals in Multipath Fading Channels Based on SEI-FSE-CMA
Qu Jin · Telecommunication Engineering · 2014
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.