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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 which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

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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