Research on Performance of PRS's pulse leading-edge distinguishing technique countering three-source decoy radar system

To solve the problem that the passive radar seeker(PRS) could hardly counter three-source decoy radar system effectively, the pulse leading-edge distinguishing technique based on time discrimination technique and wavelet analysis is proposed. PRS uses fixed strobe gate to sample the pulse leading-edge, and analyzes it using wavelet. The analysis result verifies that the sample includes only single radiation source so that the PRS can measure the sample signal direction and its frequency, track the sample signal, and attack the source target. Take three-source decoy radar system with triangular deployment for example, the feasibility of this technique is analyzed, and it is shown that the PRS can track one of decoys' signals firstly in most position of the airspace. Modeling and simulations verify that PRS with this technique can effectively counter three-source decoy radar system, and find effective distinguishing area from the fixed strobe gate.