This paper applies several Space-Time AdaptiveProcessing (STAP) methods to forward looking linear arrays.Traditionally, STAP focuses on the side looking array case,where clutter is consider range independent and a linearrelationship between the clutter Doppler frequencies and thesine of the azimuth exists. This relationship does not existfor forward looking radar. Additionally, mainbeam clutter isrange dependent and may result in multiple clutter notchesdue to range ambiguities. This range dependency corruptsthe independent, identically distributed (iid) assumption requiredfor the samples used in interference estimation. Thisassumption can still be applied for a small data set, e.g., smallrange extent. Therefore, partially adaptive techniques withextremely small sample support requirements are required.Several techniques are evaluated with the Parametric AdaptiveMatched Filter offering a unique advantage, near fulladaptivity with extremely small sample support, evidencedby its excellent performance relative to the other methodsconsidered. This paper characterizes the performance associatedwith operating a forward looking radar.
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