一种基于单切面循环谱的MPSK信号的载频的快速估计法  

A Fast Algorithm of Carrier Frequency Based on Single Profiled SCD for MPSK Signals

作　　者：于岩[1] 张旭洲[1] 李洪义 

机构地区：[1]空军航空大学 [2]解放军93132部队

出　　处：《舰船电子工程》2013年第6期81-82,144,共3页Ship Electronic Engineering

摘　　要：通过分析MPSK信号的循环谱,得到信号载频与循环谱图中峰值的关系。利用循环谱图的对称性,提出一种根据频率f=0的单切面循环谱图法检测和估计MPSK信号载频的方法。只需搜索切面中的峰值就可以计算出信号的载频,在计算量上从二维降低到了一维,同时抗噪性相比于全序列域平滑法得到了提升。最后通过仿真验证了论文方法适用于各种MPSK信号,能够在较低信噪比下估计出信号载频。Through analyzing the SCD of MPSK signals, the relationship is got between the carrier frequency and peaks in SCD. By making use of the symmetry of SCD, a novel algorithm based on the single profile f= 0 of SCD is proposed. It searched the peaks in the pro file, which help to estimate the carrier frequency. The algorithm reduces the computation hy depressing the 2-D to 1-D and it improves the anti-noise compared to complete sequence domain smoothing. Experimental simulations verify the effectiveness of the proposed algorithm for different MPSK signals and can get precise estimation under low SNR.

关 键 词：载频估计 循环谱 MPSK 抗噪性 

分 类 号：TN957[电子电信—信号与信息处理]