基于双干扰机协同的SAR-GMTI可控压制干扰生成方法

现有对抗合成孔径雷达地面运动目标指示（SAR-GMTI）系统的压制干扰多采用单干扰机非相干干扰方法生成，成像后干扰会扩散至整个距离向或者方位向，导致生成的压制区域不可控，且经相位中心天线（DPCA）技术处理后存在部分对消。针对这些问题，本文提出了一种基于双干扰机协同的SAR-GMTI可控压制干扰生成方法。该方法使用运动调制和余弦相位调制控制方位向干扰位置和压制范围，使用移频调制和噪声卷积调制控制距离向干扰位置和压制范围，使用双干扰机协同解决干扰被部分对消的问题。理论分析和实验结果表明，该文提出的干扰方法生成的干扰条带能够对抗SAR-GMTI的对消，保护运动目标；同时，因生成的干扰区域精确可控，干扰效率更高，具有较好的工程实用性。 

A Controllable Suppressed Jamming Area Generation Method Against SAR-GMTI Based on Double Synergetic Jammers

The suppressed jamming area generated using the existing suppressed jamming methods is uncontrollable when against Synthetic aperture radar ground moving target indication （SAR-GMTI） system， which is because of the incoherence between the jamming signal and the target echo causing proliferation in range or azimuth direction. And， the jamming can be partly cancelled by displaced phase center antenna （DPCA） processing because it is generated by only a single jammer. Aiming at the problem above， this paper proposes a controllable suppressed jamming area generation method against SAR-GMTI based on double synergetic jammers. This method uses Doppler modulation and consinusoidal phase modulation to control the azimuth jamming position and suppression range. Meanwhile， shift-frequency modulation and noise convolution modulation are used to control the distance jamming position and suppression range. Besides， double synergetic jammers are utilized to solve the problem that jamming is partly cancelled. Theoretical analysis and experimental results show that the jamming patches generated by the jamming method proposed in this paper can counter the cancellation of SAR-GMTI and protect moving targets. At the same time， because the generated jamming area is accurately controllable， the jamming efficiency is higher and has better performance in engineering practicality.