A blind demodulation of MPSK and MQAM signal technical study and simulation
In this paper,an MPSK/MQAM blind demodulation algorithm is proposed.MPSK and MQAM signals are common modulation signals used in satellite and microwave communications.The problem of signal parameter estimation is emphatically studied and its effectiveness is theoretically analyzed.Based on the study above,a new blind demodulation algorithm of MPSK/MQAM signal based on the joint estimation of carrier frequency,bandwidth and symbol rate is proposed,combined with the variance algorithm of modulation mode recognition.Blind demodulation of MPSK/MQAM signals was simulated on the MATLAB platform.The experimental results show that the algorithm has a simple structure,fast demodulation speed,strong anti-interference ability,low bit error rate,and high recognition rate.
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