Research on Anti-Interrupted Sampling Repeater Jamming based on CC-MCPC radar signal

Based on the discontinuous sampling characteristics on time domain of Interrupted Sampling Repeater Jamming (ISRJ), a new radar signal based on Carrier Coded (CC) and Multi-Carrier Phase Coded (MCPC) with the characteristics of anti-Interrupted Sampling Repeater Jamming (AISRJ), namely CC-MCPC signal, is creatively proposed. Different from the filter design approaches, which are most popular used currently, CC-MCPC is carried on the perspective of waveform design, adopts chaotic sequences with good pseudo-randomness to code each symbol in the time domain and the Barker code to code each subcarrier in the frequency domain. The coded carriers increase the pseudo-randomness of the radar waveform pulse and reduce the correlation between the radar echo and the interrupted sampling jamming, thereby effectively suppressing the interference of the false target. CC-MCPC signal is an effective complement to the commonly used filter design method. In the experiments, two simulations are designed to verify the effectiveness and feasibility of CC-MCPC signal. The experiment results show that the SJR improvement factor value of the CC-MCPC signal is optimized by nearly 1-1.5 dB after the pulse compression in the anti-ISRJ experiment compared with the traditional MCPC signal and LFM signal under the typical parameters described in the paper.