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Sensors 2013, 13(9), 11490-11497; doi:10.3390/s130911490
Article

Covariance-Based Direction-of-Arrival Estimation of Wideband Coherent Chirp Signals via Sparse Representation

* ,
,
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College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
* Author to whom correspondence should be addressed.
Received: 23 May 2013 / Revised: 8 August 2013 / Accepted: 19 August 2013 / Published: 29 August 2013
(This article belongs to the Section Physical Sensors)
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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.
Keywords: direction-of-arrival (DOA) estimation; wideband chirp signal; sparse representation; convex optimization direction-of-arrival (DOA) estimation; wideband chirp signal; sparse representation; convex optimization
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Sha, Z.; Liu, Z.; Huang, Z.; Zhou, Y. Covariance-Based Direction-of-Arrival Estimation of Wideband Coherent Chirp Signals via Sparse Representation. Sensors 2013, 13, 11490-11497.

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