四川大学学报（自然科学版）2011，Vol.48Issue(3)：596-602,7.DOI:10.3969/j.issn.0490-6756.2011.03.021
高精度正弦信号频率估计算法研究
High-precision algorithm research for sinusoidal frequency estimation
摘要
Abstract
The paper analysed interpolation model of frequency estimation under the condition of complex sinusoidal signal,and analysed each interpolation algorithm. The paper indicated that the volatility of variance of Rife algorithm, at low SNR, undermines the stability of the MRife algorithm, and decreases estimation accuracy at some frequecy points. The paper also pointed out the volatility of Quinn algorithm at low SNR, then proposed modifying to enhance stability of the algorithm. Finally, an improved iterative method was proposed and its effection was analysed. The improved method iterates once with the initial value from modified Quinn algorithm, and twice at some frequency points. Monte-Carlo simulation shows that mean square error of estimation of all frequency points approaches to Cramer-Rao Lower Bound and performs high anti-noise property and stability.关键词
正弦信号/频率估计/克拉美罗下限/傅立叶系数Key words
sinusodial signal/ frequency estimation/ Cramer-Rao lower bound/ fourier coefficients分类
信息技术与安全科学引用本文复制引用
李任科,何培宇,黄骏,高勇..高精度正弦信号频率估计算法研究[J].四川大学学报（自然科学版）,2011,48(3):596-602,7.基金项目
总装预研基金资助项目(JG2008040) （JG2008040）
