title: Joint Estimation of Time-Frequency Signature and DOA Based on STFD for Multicomponent Chirp Signals.
abstract: In the study of the joint estimation of time-frequency signature and direction of arrival (DOA) for multicomponent chirp signals, an estimation method based on spatial time-frequency distributions (STFDs) is proposed in this paper. Firstly, array signal model for multicomponent chirp signals is presented and then array processing is applied in time-frequency analysis to mitigate cross-terms. According to the results of the array processing, Hough transform is performed and the estimation of time-frequency signature is obtained. Subsequently, subspace method for DOA estimation based on STFD matrix is achieved. Simulation results demonstrate the validity of the proposed method.
authors.affiliation: Research Institute of Information Countermeasure, Xidian University, Xi'an, Shaanxi 710071, China.
authors.forename: Ziyue
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Research Institute of Information Countermeasure, Xidian University, Xi'an, Shaanxi 710071, China.
authors.forename: Congfeng
authors.initials: C
authors.lastname: Liu