基于子带信号的MPSK载频估计算法

均匀子带技术是宽带信道化中经常采用的数据处理方法。针对均匀子带信道化易造成信号频谱割裂的问题，建立了M进制移相键控(M phase-shift-keying,MPSK)信号子带信道化输出的数学模型。将目标信号的频谱损失转化为码元成型函数的变化，证明子带信号保留了原信号码元成型函数所带来的循环平稳特性，提出了一种新的基于子带信号M次方谱的载频估计算法。该方法无需合并子带就可进行目标信号的参数估计，提高了宽带处理的效率。仿真分析了算法在不同带宽覆盖比和不同信噪比下的估计性能。理论分析和仿真结果证明了算法的有效性和可靠性。

MPSK carrier frequency estimation algorithm based on subband signals

Uniform subband technology is a useful data processing method for broadband channelization.In view of the disseverment of signal spectrum in uniform subband channelization,a mathematical model is established for M phase-shift-keying(MPSK) subband signals.The spectrum distortion of object signals is considered as the transition of the shape function.It is proved that the subband signal preserves the cyclostationarity of original signals.A new carrier frequency estimation algorithm is presented based on the spectrum of subband signals without merging the subbands.This algorithm improves the efficiency of broadband processing.The influences of the frequency domain coverage percentage and signal-to-noise ratio(SNR) are analyzed with the computer simulation.The effectivity and credibility of this algorithm are testified by theoretical deduction and simulations.