SDPSK调制参数的盲估计

Blind Estimation of SDPSK Parameters

SDPSK(Symmetrical DPSK)与DPSK相比,除同样有误码率特性好、适合非相干解调的特点外,在限带传输时还具有包络起伏小的优点,因此应用日益广泛。介绍了SDPSK的调制方法,通过分析SDPSK调制信号的特性,推导出调制参数(载波频率和码速率)的估计方法,并利用Matlab对算法进行了仿真,仿真结果验证了算法的正确性。所得到的参数估计方法,具有算法简单、估计精度高的特点,非常适合于硬件实现。所做的工作对SDPSK信号的侦察和盲解调具有重要意义。

SDPSK （Symmetrical DPSK） is a modulation technique with small envelope variations, and is widely used. The characteristics of SDPSK signal are analyzed, and the estimation method of the carrier frequency and bit rate is deduced. The simulation results show that the method is effective, the calculation is simple and the estimation precision is high. The results are very important for SDPSK signal reconnaissance and SDPSK blind demodulation.