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.
出处
《舰船电子工程》
2013年第6期81-82,144,共3页
Ship Electronic Engineering
关键词
载频估计
循环谱
MPSK
抗噪性
carrier frequency estimation
CSD
MPSK
anti-noise
