一种改进的卫星MPSK通信信号盲载频估计算法  

An Improved Blind Carrier Frequency Estimation Algorithm for Satellite MPSK Signals

作　　者：燕展[1] 康凯[1] 王红军[1] 

机构地区：[1]解放军电子工程学院,合肥230037

出　　处：《电讯技术》2013年第9期1186-1190,共5页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(60972161)~~

摘　　要：针对第三方侦察中卫星通信信号的载波频率高精度估计问题,提出了一种没有先验知识条件下的MPSK信号盲载频估计改进算法,推导了MPSK信号四阶循环累积量运算的简化形式,并采用循环重叠Welch功率谱粗载频估计和四阶循环累积量精估计的方法完成MPSK信号的载频估计,大幅降低了运算量。仿真实验证明了所提算法的有效性。For the problem of carrier frequency high-precision estimation of satellite signal, an improved blind carrier frequency estimation algorithm for satellite MPSK signals is presented in presence of unknown parameters. The simplified format of fourth-order cyclic cummulant is analyzed and used in order to reduce the computational complexity. The circular overlap Welch spectrum is used to perform a coarse estimation and the high-order cyclic cummulant method is used to perform a fine estimation. Simulation results show that the new algorithm can quickly and effectively estimate the signal cartier frequency under low SNR.

关 键 词：卫星通信 MPSK信号 载频估计 盲估计 循环重叠Welch功率谱 高阶循环累积量 

分 类 号：TN927.2[电子电信—通信与信息系统]