西安电子科技大学学报（自然科学版）2019，Vol.46Issue(1)：51-56,6.DOI:10.19665/j.issn1001-2400.2019.01.009
一种多分量调频信号瞬时频率估计方法
Method for IF estimation of multicomponent FM signals
摘要
Abstract
Aiming at the key problem on the phase structure analysis for multicomponent FM signals,an IF(Instantaneous Frequency)estimation method based on the Viterbi algorithm is proposed.Inspired by the idea of track association in multi-target tracking,combining IF trajectory tracking with multi-target tracking,a new membership penalty function is introduced to broaden adaptability and the proposed method performs better than the original VA which is only applicable to single-component signals.Furthermore,a new TF(Time-Frequency)cross-point processing method is proposed to improve the estimation accuracy of multicomponent signals.According to simulation results,the proposed method can obtain accurate IF information on multicomponent signals with a complex phase structure.Compared to the existing algorithms,it is shown that the proposed algorithm based on the VA improves effectively the applicability and robustness for IF estimation of multicomponent signals.关键词
多分量调频信号/维特比算法/瞬时频率估计/航迹关联Key words
multicomponent frequency modulation signals/Viterbi algorithm/instantaneous frequency estimation/track association分类
信息技术与安全科学引用本文复制引用
苏小凡,肖瑞,朱明哲..一种多分量调频信号瞬时频率估计方法[J].西安电子科技大学学报（自然科学版）,2019,46(1):51-56,6.基金项目
国家自然科学基金青年基金(61701374) （61701374）
