title: Covariance-based direction-of-arrival estimation of wideband coherent chirp signals via sparse representation.
abstract: This paper addresses the problem of direction-of-arrival (DOA) estimation of multiple wideband coherent chirp signals, and a new method is proposed. The new method is based on signal component analysis of the array output covariance, instead of the complicated time-frequency analysis used in previous literatures, and thus is more compact and effectively avoids possible signal energy loss during the hyper-processes. Moreover, the a priori information of signal number is no longer a necessity for DOA estimation in the new method. Simulation results demonstrate the performance superiority of the new method over previous ones.
authors.affiliation: College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China. shazhichao_163@163.com
authors.forename: Zhichao
authors.initials: Z
authors.lastname: Sha
authors.forename: Zhengmeng
authors.initials: Z
authors.lastname: Liu
authors.forename: Zhitao
authors.initials: Z
authors.lastname: Huang
authors.forename: Yiyu
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D000465:Algorithms; D003627:Data Interpretation, Statistical; D010363:Pattern Recognition, Automated / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D013685:Telecommunications; D013997:Time Factors