NDLI: Detection of a distributed target with direction uncertainty

Content Provider	IET Digital Library
Author	Liu, Weijian Xie, Wenchong Liu, Jun Zou, Dujian Wang, Honglin Wang, Yongliang
Abstract	In this study, the authors deal with the problem of detecting a distributed target in coloured noise with unknown covariance matrix. The target echoes are all assumed to come from the same direction. However, the exact direction is unknown a priori. Precisely, the signal steering vector lies in a certain known subspace, but with unknown coordinate. They derive the Wald test and two-step Wald test and also show that there is no meaningful Rao test or its two-step variation. Moreover, it is found that the two-step Wald test is equivalent to an existing direction detector. Additionally, it is shown that the Wald test possesses the constant false alarm rate property. Some numerical examples are given to compare the detection performance of the novel direction detector with its counterparts, both in the cases of matched and mismatched signals.
Starting Page	1177
Ending Page	1183
Page Count	7
ISSN	17518784
Volume Number	8
e-ISSN	17518792
Issue Number	Issue 9, Dec (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/8/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2014.0110
Journal	IET Radar, Sonar & Navigation
Publisher Date	2014-06-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Algebra Coloured Noise Constant False Alarm Rate Property Covariance Matrices Covariance Matrix Direction Uncertainty Distributed Target Detection Object Detection Radar Detection Radar Equipment Rao Test Signal Detection Signal Matching Signal Mismatching Signal Steering Vector System And Application Two-step Wald Test Vector
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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