Abstract
Numerous active repetition false targets (RFTs) introduced by deception jammer with digital radio-frequency memory system, which makes efficient use of jamming power, can easily exhaust the radar and interceptor resources of any defence system. On the basis of the idea of group treatment, a commonality in the polarimetric characteristics of multiple RFTs produced by one jammer is employed to discriminate them, after the simultaneous polarisation measurement is made by fully-polarimetric defence radar. First, the commonality of RFTs will be extracted from the models of the jamming signals in two cases where the receiving and transmitting antennas of jammer are single- and dual-polarised, respectively. The relationship equation between the two polarisation channels of defence radar will be derived in detail. Second, discrimination method will be introduced based on probability grids, and cumulative probabilities will be calculated to detect and discriminate RFTs. Simulation results obtained by using polarisation data measured from microwave anechoic chamber of physical target scale models indicate that the method is valid and feasible.
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