Performances of order statistics CFAR

Author

Shor, Mordechai ; Levanon, Nadav

Author_Institution

Dept. of Electron. Syst., Tel-Aviv Univ., Israel

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

214

Lastpage

224

Abstract

A previous analysis of order-statistics constant-false-alarm-rate (OS-CFAR) radar receiving a single pulse from a Rayleigh fluctuating target in a Rayleigh background is extended to a Rayleigh-plus-dominant target. The analysis includes effects of a multitarget environment. A detailed comparison of OS-CFAR, cell-averaging (CA) CFAR, and censored CA-CFAR is provided for a Rayleigh target in the presence of strongly interfering targets. The false-alarm analysis of OS-CFAR is extended to the more general case of a Weibull background. The deterioration of the CFAR property of OS as the shape factor, C, of a Weibull probability density function changes from Rayleigh (C=2) to a longer-tailed one (C<2) is evaluated. The analytic comparison between CA-CFAR and OS-CFAR is extended to an integration of pulses reflected from a Swerling II target. The OS-CFAR performance (with and without interfering targets) yields an integral equation that is solved numerically

Keywords

integral equations; probability; radar interference; radar receivers; radar theory; signal processing; Rayleigh background; Rayleigh fluctuating target; Rayleigh-plus-dominant target; Weibull background; Weibull probability density function; censored cell averaging CFAR; deterioration; integral equation; interfering targets; multitarget environment; order statistics CFAR; order-statistics constant-false-alarm-rate; shape factor; Envelope detectors; Integral equations; Noise level; Performance analysis; Performance evaluation; Probability density function; Shape; Signal to noise ratio; Statistical analysis; Statistics;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.78295

Filename

78295