Principles of Modern Radar - Volume 2 1891121537

582 CHAPTER 12 Electronic ProtectionTABLE 12-3Summary of EA TechniquesEA Technique Primary Effect Jammer Type Jammer RoleSupport Self-ProtectName Abbrev. Masking Deception Noncoherent Coherent (SOJ, SIJ, ESJ) (SSJ)Spot noise SN x x x xBarrage noise BN x x x xBlinking spot noise BSN x x xBlinking barrage noise BBN x x x xMultiple spot noise MSN x xResponsive spot noise RSN x x x xNoise cover pulse NCP x x x x xCW range denial CWRD x x x xDoppler noise DN x x x xRange bin masking RBM x x xVelocity bin masking VBM x x xAGC capture AGCC x x xRange false targets RFT x x x xVelocity false targets VFT x x x xSidelobe false targets SLFT x x xRange gate pull-off RGPO x x xVelocity gate pull-off VGPO x x xInverse gain IG x x x xSwept AM SAM x x x xAGC deception AGCD x x x xImage jamming IMJ x x x xChaff burst CHF x xTowed RF decoy TRD x x x xExpendable decoy EXPD x x x xTerrain bounce TB x x x xJammed chaff JAFF x x x xCross-pol XPOL x x xCross-eye XEYE x x xCoop. blinking noise CBN x x x x xfor the JSR of a noise jammer, saturated coherent repeater, and linear coherent repeaterare, respectively,JSR = P j G j,tx G rj d j 4π R 4R 2 j B j P t G t G r σ nτ(12.29)JSR SAT = P j G j,tx G rj d j 4π R 4R 2 j P t G t G r σ n j(12.30)JSR LIN = G tjG rj G j,rx G j,tx g j,el λ 2 R 4 d jG t G r 4πσR 4 j n j(12.31)Electronic protection capabilities can be implemented within any functional subsystemin the radar: the antenna, transmitter, exciter, receiver, signal processor, and dataprocessor. The EP techniques allow filtering, cancelling, resolving, attenuating, or distinguishinga jamming signal relative to the desired target. The EP can be applied in thespatial, temporal, spectral, or polarization domains. Table 12-4 provides a summary of the