CAJ | 학술논문

针对DRFM拖引干扰机诱偏火控雷达的距离波门问题，提出一种基于回波互相关的拖引干扰抑制方法。其主要步骤包括：对典型的匀速拖引干扰和匀加速拖引干扰进行数学建模，对包含目标回波和拖引干扰的雷达回波进行回波互相关，对雷达回波的互相关函数依次低通滤波和逆回波互相关。仿真结果表明：无论在匀速拖引干扰或匀加速拖引干扰环境下，该方法都能较好地抑制拖引干扰。当信噪比大于0 dB时，该算法干扰抑制深度比IPMF算法高3～5 dB，比ICC算法高8～10 dB，更加有效地抑制了拖引干扰，从而使火控雷达的距离波门始终套住目标回波，增加了武器的有效打击力。
침대DRFM타인간우궤유편화공뢰체적거리파문문제，제출일충기우회파호상관적타인간우억제방법。기주요보취포괄：대전형적균속타인간우화균가속타인간우진행수학건모，대포함목표회파화타인간우적뢰체회파진행회파호상관，대뢰체회파적호상관함수의차저통려파화역회파호상관。방진결과표명：무론재균속타인간우혹균가속타인간우배경하，해방법도능교호지억제타인간우。당신조비대우0 dB시，해산법간우억제심도비IPMF산법고3～5 dB，비ICC산법고8～10 dB，경가유효지억제료타인간우，종이사화공뢰체적거리파문시종투주목표회파，증가료무기적유효타격력。
According to the range gate of fire control radar controlled by the DRFM pull-off jammer, an approach of gate pull-off jamming suppression based on the echo cross-correlation (ECC) is proposed. The main steps are as follows. Firstly, mathematics modeling of gate pull-off jamming with constant velocity and acceleration (GPOJCV and GPOJCA) are investigated. Secondly, the cross-correlation function of radar echo is got by ECC, which contain target echo and GPOJCV (or GPOJCA). Thirdly, after the low-pass filtering, the inverse echo cross-correlation (IECC) of radar echo is obtained. Simulation results show that both in the GPOJCV and GPOJCA environment, the approach can suppress jamming well; When the signal-to-noise ratio (SNR) is greater than 0 dB, the signal-to-jamming ratio improving factor (SJR IF) of this algorithm has about 3~5 dB higher than IPMF, and about 8~10 dB higher than ICC, which suppresses gate pull-off jamming to the most. So the target echo is always in the range gate of fire control radar. Finally, it increase the effective force of arms.