%0 Journal Article
%T Covariance-Based Direction-of-Arrival Estimation of Wideband Coherent Chirp Signals via Sparse Representation
%A Zhichao Sha
%A Zhengmeng Liu
%A Zhitao Huang
%A Yiyu Zhou
%J Sensors
%D 2013
%I MDPI AG
%R 10.3390/s130911490
%X 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.
%K direction-of-arrival (DOA) estimation
%K wideband chirp signal
%K sparse representation
%K convex optimization
%U http://www.mdpi.com/1424-8220/13/9/11490