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CFAR matched direction detector

Besson, Olivier and Scharf, Louis CFAR matched direction detector. (2006) IEEE Transactions on Signal Processing, 5 (7). 2840-2844. ISSN 1053-587X

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Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1643926


In a previously published paper by Besson et al., we considered the problem of detecting a signal whose associated spatial signature is known to lie in a given linear subspace, in the presence of subspace interference and broadband noise of known level. We extend these results to the case of unknown noise level. More precisely, we derive the generalized-likelihood ratio test (GLRT) for this problem, which provides a constant false-alarm rate (CFAR) detector. It is shown that the GLRT involves the largest eigenvalue and the trace of complex Wishart matrices. The distribution of the GLRT is derived under the hypothesis. Numerical simulations illustrate its performance and provide a comparison with the GLRT when the noise level is known.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Colorado State University - CSU (USA)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
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Deposited On:28 Feb 2008 10:23

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