DocumentCode :
1127255
Title :
Adaptive Radar Detection with Asymptotically Regulated False-Alarm Rate
Author :
Tugnait, Jitendra K. ; Prasad, Santasriya
Author_Institution :
3-110 Coordinated Science Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801
Issue :
4
fYear :
1977
fDate :
7/1/1977 12:00:00 AM
Firstpage :
390
Lastpage :
394
Abstract :
An adaptive detection procedure is described by which the detection threshold is so adjusted as to provide an asymptotic false-alarm probability PFA that is approximately invariant with changes in radar clutter return amplitude probability density functions (pdf\´s) in a broad class. The class includes Rayleigh, chi, Weibull, and lognormal pdf\´s. The receiver noise is also taken into account. The clutter-plus-noise pdf is approximated by a truncated generalized Laguerre series, the coefficients of which are estimated from the radar returns using "cell averaging" techniques. This estimation is assumed to be perfect. The results obtained indicate that the "bias" error, defined as the normalized difference between the design PFA and the asymptotic PFA corresponding to the computed threshold, lies within a fraction of an order of magnitude for 10-3¿PFA ¿ 10-6. For PFA ¿10-6 the bias error is more than an order of magnitude. These results are for the case when a single independent radar return is processed at a time. The bias error decreases as the number of postdetection integrations of independent returns increases.
Keywords :
Envelope detectors; Interference; Matched filters; Polynomials; Probability density function; Radar clutter; Radar detection; Reactive power; Rician channels; Weibull distribution;
fLanguage :
English
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9251
Type :
jour
DOI :
10.1109/TAES.1977.308473
Filename :
4101828
Link To Document :
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