The anti-jamming method based on front-back-edge tracking of VGPO jamming

Tracking radar can provide the range, velocity and angle measured values of the target continuously, smoothly and accurately. Velocity gate pull off (VGPO) jamming is an active deception jamming aiming at velocity automatic tracking system. The system of Pulse Doppler (PD) tracking radar may face VGPO jamming, so a new method of anti-jamming is proposed in this paper. First of all, it judges the jamming towing direction from the velocity gate moving acceleration, then tracks the target velocity using front-back-edge tracking method in Doppler domain. Using the front-edge tracking method counters jamming while jamming is posterior to the target echo, and using the back-edge tracking method counters the jamming while jamming is in front of target echo. The simulation results show that this method has good effectiveness of anti-VGPO jamming.