电光与控制, 2017, 24 (7): 12, 网络出版: 2017-09-21
微动调制间歇采样转发干扰对SAR-GMTI干扰性能分析
Performance Analysis of Micro-Motion-Modulation Based Intermissive Sampling and Retransmitted Jamming to SAR-GMTI
合成孔径雷达 地面动目标显示 余弦调相 间歇采样 转发干扰 性能分析 Synthetic Aperture Radar (SAR) Ground Moving Target Indication (GMTI) cosine phase-modulation intermittent sampling repeater jamming performance analysis
摘要
针对合成孔径雷达成像-地面动目标显示(SAR-GMTI)对运动目标的威胁, 给出了基于微动调制的间歇采样转发干扰方法, 并分析了该方法对SAR-GMTI的干扰性能。该方法沿方位向的干扰通过在慢时间域进行余弦调相, 沿距离向的干扰是通过对信号间歇采样转发, 二者结合可在SAR成像中形成二维网状干扰效果。建立了干扰模型, 给出了干扰信号成像表达式, 最后以三通道干涉对消技术为例着重分析了其对多通道GMTI的对抗性能。仿真实验表明该干扰仅能被对消一小部分, 对多通道SAR-GMTI仍然具有二维点状干扰效果, 但二维点状目标将出现增强区和削弱区。
Abstract
Aiming at the threat of Synthetic Aperture Radar and Ground Moving Target Indication (SAR-GMTI) to the moving target,a method of intermissive sampling and retransmitted jamming based on micro-motion modulation is presented,and analysis is made to its jamming performance.With this method,cosine phase modulation is made to the azimuth jamming in slow time domain,and the range jamming is retransmitted through intermittent sampling repeater.The combination of them provides 2D reticular jamming to the SAR image.The model of SAR jamming is constructed and the image output of the jamming is given.The countering performance against GMTI is analyzed by using the tri-channel interference canceling technique.The simulation results show that:The jamming still can produce 2D dots jamming performance for multi-channel SAR-GMTI because only a little part of it is cancelled,but the amplitudes of 2D dots have enhanced and weakened areas.
周阳, 毕大平, 沈爱国, 房明星. 微动调制间歇采样转发干扰对SAR-GMTI干扰性能分析[J]. 电光与控制, 2017, 24(7): 12. ZHOU Yang, BI Da-ping, SHEN Ai-guo, FANG Ming-xing. Performance Analysis of Micro-Motion-Modulation Based Intermissive Sampling and Retransmitted Jamming to SAR-GMTI[J]. Electronics Optics & Control, 2017, 24(7): 12.