西安电子科技大学学报（自然科学版）2011，Vol.38Issue(5)：90-94,5.DOI:10.3969/j.issn.1001-2400.2011.05.015
一种低信噪比下MPSK信号频率估计方法
Novel frequency estimation of MPSK signals in low SNR environment
摘要
Abstract
A novel frequency estimation method of MPSK signals in the low SNR condition is proposed, which solves the problem of requiring a high signal-to-noise ratio. First, the AR models are created by using the modem spectrum estimation method, and the small residual frequency offset signal is obtained through rough carrier frequency estimation values of the MPSK signal. Then after the Af-th nonlinear transformation, the higher accuracy of the residual frequency offset value is estimated based on the maximum likelihood criterion. Simulation results show that the algorithm can lead to a higher accuracy under the low-SNR condition and that it is stable and reliable.关键词
MPSK信号/频率估计/低信噪比/M-th非线性变换/最大似然准则Key words
MPSK signals/ frequency estimation/ low signal to noise ratio/ Af-th nonlinear transformation/ maximum-likelihood criterion分类
信息技术与安全科学引用本文复制引用
崔艳鹏,胡建伟,杨绍全,王伟..一种低信噪比下MPSK信号频率估计方法[J].西安电子科技大学学报（自然科学版）,2011,38(5):90-94,5.基金项目
西安电子科技大学基本科研业务费资助项目(K50510020035,K50511020030) （K50510020035,K50511020030）
国家部委预研基金资助项目(9140A07020806DZ01) （9140A07020806DZ01）
