基于LFM雷达时延-频移耦合性的间歇采样转发改进方法  

Improved Intermittent Sampling and Forwarding Interference Based on LFM Radar Delay and Frequency Shift Coupling

作　　者：张翔[1] 李彦志[1] 鲁建华[1] 郭毓鹍[1] 

机构地区：[1]空军航空大学,长春130022

出　　处：《电光与控制》2017年第3期98-101,共4页Electronics Optics & Control

摘　　要：结合线性调频雷达的时延-频移耦合的特性,改进了传统间歇采样干扰,弥补了传统方法在应对某些新型抗干扰方式上的不足。改进方法运用频域拓展信号和时延信号共轭的乘积,经过理论推导,给出了假目标出现位置的控制模型,发现假目标出现位置与调频斜率无关,证明了改进方法相对于传统方法的优越性,最后通过仿真实验验证了改进方法的有效性。从干扰功率和假目标位置设置的灵活性两方面进行了仿真分析以及论述,结果表明应首先确定拓展阶数再根据需要计算所需延迟,这样不仅可以获得一个较大的干扰信号增益,同时在假目标设置上也更为灵活。Based on the characteristics of time delay and frequency shift of linear frequency modulation radar,the traditional intermittent sampling jamming is improved,which makes up for the shortcomings of traditional methods in dealing with some new type of anti-interference modes. The improved method uses the product of time domain signals and signal delay conjugate,and false target position controlling model is given through theoretical derivation. It is found that position of false target is unrelated to the frequency modulation slope. So it is proved that the improved method is superior to the traditional method. Finally,the effectiveness of the improved method is verified through simulation experiment. The simulation analysis and discussion are carried out from two aspects of the interference power and the flexibility of the false target position setting. The results show that it would be better to determine firstly the number of extended order and then calculate the required delay,which can not only obtain a larger signal gain,but also more flexible in the false target setting.

关 键 词：欺骗干扰 调频斜率 间歇采样 频域拓展 

分 类 号：TN972[电子电信—信号与信息处理]