CAJ | 학술논문

基于 DRFM 的干扰机转发的有源欺骗干扰由于具有目标回波相似的脉压增益和目标行为，严重影响了雷达获取真实目标信息的能力。针对该类干扰，根据雷达接收机匹配滤波器得到雷达回波脉压信号矩阵，对该脉压信号矩阵按行 FFT 得到雷达回波脉压信号频谱矩阵。基于该脉压信号频谱矩阵目标回波频点估计设置带通滤波器，并对脉压信号频谱矩阵滤波得到目标回波脉压信号频谱矩阵估计。对该目标回波脉压信号频谱矩阵按行 IFFT 得到目标回波脉压信号矩阵，从而得到了基于 FFT 的有源欺骗干扰抑制方法。仿真结果表明当雷达回波脉冲数为60时，在 Swerling I 目标起伏下，该算法干扰抑制深度为20 dB 左右。在 Swerling II 目标起伏下，该算法干扰抑制深度为19 dB 左右。
기우 DRFM 적간우궤전발적유원기편간우유우구유목표회파상사적맥압증익화목표행위，엄중영향료뢰체획취진실목표신식적능력。침대해류간우，근거뢰체접수궤필배려파기득도뢰체회파맥압신호구진，대해맥압신호구진안행 FFT 득도뢰체회파맥압신호빈보구진。기우해맥압신호빈보구진목표회파빈점고계설치대통려파기，병대맥압신호빈보구진려파득도목표회파맥압신호빈보구진고계。대해목표회파맥압신호빈보구진안행 IFFT 득도목표회파맥압신호구진，종이득도료기우 FFT 적유원기편간우억제방법。방진결과표명당뢰체회파맥충수위60시，재 Swerling I 목표기복하，해산법간우억제심도위20 dB 좌우。재 Swerling II 목표기복하，해산법간우억제심도위19 dB 좌우。
Based on DRFM jammer,active deception jamming seriously affects the capability of the ra-dar obtaining true target information because of its similar pulse compression gain of target echo and vivid target behavior.In view of this kind of jamming,according to the radar receiver matched filter,pulse com-pression signal matrix(PCSM)of radar echo is obtained.By FFT of the PCSM row,pulse compression sig-nal spectrum matrix(PCSSM)of radar echo is got.Based on frequency point estimation of target echo in the PCSSM,band-pass filter could be obtained.According to the filter and the PCSSM of radar echo,the PC-SSM of target echo could be got.Then the PCSM of target echo is obtained by IFFT of the PCSSM row.So the suppression of active deception jamming based on the FFT is got.The simulation results show that when the number of radar echo pulses is 60,the signal-to-jamming ratio improving factor of the FFT algorithm is about 20 dB in Swerling I,while it is about 19 dB in Swerling II.