Design and verification of multi-octave active countermeasure system using novel triple closed loop simulation

Highly intelligent search and tracking radars operating in various frequency bands are integral part of defense system against long range ballistic missiles. Frequency and polarization agile active countermeasure system facilitates deception and delayed discrimination & target acquisition by these threat radars. This paper presents design and verification of a multi octave expendable active countermeasure system using novel triple closed loop system simulation and measurement methodology implemented via software-hardware-software (SW-HW-SW) interface. A virtual radar-channel-counter-measure-channel-radar scenario was generated using system simulation tool. The path between transmitter and receiver of radar simulation model was looped back using target Radar Cross Section (RCS) model and countermeasure model implemented in software whereas third loop-back was implemented using fabricated hardware. Simultaneous coherent detection and analysis of these three time-synchronized received signals were carried out for verification of deception and visualization of fabricated artificial target as perceived by ground based radar in hypothetical conditions. The design and verification methodology with results have been presented for conducted mode tests.