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Proceedings Paper

Robust two-parameter invariant CFAR detection utilizing order statistics applied to Weibull clutter
Author(s): Daniel T. Nagle; Jafar Saniie
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Paper Abstract

Constant False Alarm Rate (CFAR) detectors are designed to perform when the clutter information is partially unknown and/or varying. This is accomplished using local threshold estimates from background observations in which the CFAR level is maintained. However, when local observations contain target or irrelevant information, censoring is warranted to improve detection performance. Order Statistics (OS) processors have been shown to perform robustly (referring to type II errors or CFAR loss) for heterogeneous background clutter observations, and their performance has been analyzed for exponential clutter with unknown power. In this paper, several order statistics are used to create an invariant test statistic for Weibull clutter with two varying parameters (i.e., power and skewness). The robustness of a two-parameter invariant CFAR detector is analyzed and compared with an uncensored Weibull-Two Parameter (WTP) CFAR detector and conventional Cell Averaging (CA)-CFAR detector (i.e., designed invariant to exponential clutter). The performance trade-offs of these detectors are gaged for different scenarios of volatile clutter environments.

Paper Details

Date Published: 25 August 1992
PDF: 12 pages
Proc. SPIE 1698, Signal and Data Processing of Small Targets 1992, (25 August 1992);
Show Author Affiliations
Daniel T. Nagle, Naval Undersea Warfare Ctr. (United States)
Jafar Saniie, Illinois Institute of Technology (United States)

Published in SPIE Proceedings Vol. 1698:
Signal and Data Processing of Small Targets 1992
Oliver E. Drummond, Editor(s)

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