一种虚假大场景SAR快速转发式欺骗干扰方法研究

A Method of SAR Fast Repeater Deception Jamming for Large False Scene

该文提出一种适用于大场景的实时欺骗干扰算法,该算法在对SAR欺骗干扰几何模型分析的基础上,对大场景干扰图像模板进行分块并行调制,从而保证了大场景欺骗干扰算法的实时性。根据SAR成像的距离聚焦深度与方位频率混叠的限制对欺骗干扰范围进行了分析,为大场景欺骗干扰分块提供了理论依据,并通过实时调整欺骗干扰子块聚焦中心使各个欺骗干扰子块都能够在敌方合成孔径雷达成像系统中得到较好的聚焦效果,从而实现对合成孔径雷达的有效欺骗干扰。大场景欺骗干扰仿真试验结果验证了算法的有效性。

Based on analyzing the geometric model of SAR deception-jamming,a real-time deception-jamming algorithm for large scene is proposed.For real-time jamming,a large scene is divided into several sub-blocks and modulated separately.An analysis of jamming range is done according to the depth of focus in range and ambiguity of frequency in azimuth,which provides theroy foundation for blocking partition.By real-time adapting the focus-center of each sub-block,a good focusing image is obtained.Simulation results verify the effectiveness of this algorithm.