电讯技术2017，Vol.57Issue(5)：518-522,5.DOI:10.3969/j.issn.1001-893x.2017.05.005
用于正弦波频率估计的修正Kay算法
A Modified Kay Method for Frequency Estimation of Sinusoidal Signals
王晓峰 1周 瑞 1田润澜 1王春雨1
作者信息
- 1. 空军航空大学 信息对抗系,长春 130022
- 折叠
摘要
Abstract
The Kay algorithm can estimate the frequency of sinusoidal signal with few sampling points,but it has poor performance in low signal-to-noise ratio(SNR).A modified Kay algorithm is proposed to solve the frequency estimation in low SNR.Firstly,the conditional probability density function(CPDF) of signal modulus to signal phase is derived under the maximum likelihood criterion.And then,the covariance matrix of phase difference noise and the modified weighting matrix are reconstructed.Simulation results show that the proposed method can effectively estimate the frequency of sinusoidal signal which has less sampling points,and outperforms Kay method in low SNR.关键词
电子侦察/正弦波/频率估计/低信噪比Key words
electronic reconnaissance/sinusoidal signal/frequency estimation/low SNR分类
信息技术与安全科学引用本文复制引用
王晓峰,周 瑞,田润澜,王春雨..用于正弦波频率估计的修正Kay算法[J].电讯技术,2017,57(5):518-522,5.
