Performances Of Order Statistics Cfar

Mordechai Shor*, Nadav Levanon

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Previous analysis of order statistics constant false-alarm rate (OS-CFAR) 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. Detailed comparison between OS-CFAR, CA-CFAR, and censored CA-CFAR, is provided for a Rayleigh target in the presence of strong interfering targets. The false alarm analysis of OS-CFAR is extended to the more general case of a Weibull background. This allowed evaluation of the deterioration of the CFAR property of OS as the shape factor, C., of a Weibull probability density function (pdf) changes from Rayleigh (C = 2) to a longer tailed one (C < 2). All the results for a single pulse detection appear as explicit analytic expressions. Integration of N pulses is also studied, for a Swerling II target The OS-CFAR performances for that case yielded an integral equation which is evaluated numerically. Authors’ current addresses: M. Shor, Motorola, Israel; N. Levanon, Dep't. of Electronic Systems, Tel-Aviv University, P.O. Box 39040, Ramat Aviv, Tel-Aviv, 69978, Israel.

Original languageEnglish
Pages (from-to)214-224
Number of pages11
JournalIEEE Transactions on Aerospace and Electronic Systems
Issue number2
StatePublished - Mar 1991


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