Abstract:

Intermittent sampling repeater jamming is an advanced active coherent jamming technique, the under sampling and the transceiver sharing technology are the main techniques to realize the intrapulse false target group interference, while existing radar anti-jamming means are hard to against this jamming effectively. Based on the analysis of the principles of the intermittent sampling repeater jamming, for the characteristics of the Doppler shift frequency interference, an intrapulse orthogonal linear frequency modulation phase code is designed, this waveform not only detects the targets normally in undisturbed conditions with Doppler-insensitive and low sidelobe, but also splits into different sub-signals using the corresponding matched filter to reconnaissance effectively and antijamming. Experimental results show the effectiveness of the anti-jamming methods based on intrapulse orthogonal waveform.