载波编码多载波相位编码雷达信号 抗间歇采样干扰研究

根据间歇采样转发干扰时域不连续采样特点，本文创造性地提出了一种具有抗间歇采样转发干扰特性的基于载波编码（CC）和多载波相位编码（MCPC）雷达信号，即CC-MCPC信号。与目前常用的滤波器设计抗干扰方法不同，CC-MCPC信号是从波形设计的角度出发，采用具有良好伪随机性的混沌序列对时域中的每个符号进行编码，频域中采用巴克码对每个子载波进行编码。载波编码增加了雷达波形脉冲的伪随机性，降低了雷达回波与间歇采样干扰的相关性，从而有效地抑制了假目标的干扰。CC-MCPC与常用滤波器设计方法互不冲突，可叠加使用。本文设计了两个仿真实验，验证了CC-MCPC的有效性和可行性。实验结果表明，在文中所述的典型参数下，CC-MCPC信号与传统的MCPC信号和LFM信号相比，CC-MCPC信号经脉冲压缩后的SJR改善因子优化了1-1.5dB。 

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.