调频连续波合成孔径雷达噪声调相干扰  

Noise Modulation Jamming for FMCW SAR

作　　者：于雯[1] 赵思伟[1] 

机构地区：[1]北京跟踪与通信技术研究所,北京100094

出　　处：《飞行器测控学报》2013年第5期454-457,共4页Journal of Spacecraft TT&C Technology

摘　　要：针对调频连续波合成孔径雷达的干扰问题,提出一种新型的噪声调相干扰方法,得到干扰噪声以高斯形式分布在真实干扰机回波目标周围,可用于遮盖分布式目标或区域。该方法利用噪声转发手段保持信号的相干性,调制指数和噪声功率决定干扰的覆盖范围,干扰效果基本不受侦察误差的影响,其相干干扰体制可获得部分的雷达二维处理增益。典型系统参数仿真实验验证了该干扰方法的有效性,在相同目标检测概率下,相较传统噪声压制干扰节省功率29.3dB。A novel noise phase modulation jamming method is proposed to resolve interference of FMCW （Frequency Modulated Continuous Wave） SAR （Synthetic Aperture Radar）. The noise signal got is Gaussian distribution a- round the jammer target and it is used to cover the protected area, The proposed jamming method is based on signal coherence by means of repeater phase modulation. The coverage is determined by the modulation indexes and noise power and the jamming performance is hardly affected by reconnaissance errors. A substantial part of the FMCW SAR two dimensional processing gain is obtained due to the coherent system. The validity of the method is demon- strated by simulation with typical parameters. At the same target detection rate, the proposed noise phase modula tion jamming method saves 29.3 dB of power compared with traditional barrage-type jamming methods.

关 键 词：合成孔径雷达(SAR) 调频连续波(FMCW) 相干干扰 噪声调相 干扰功率 

分 类 号：TN974[电子电信—信号与信息处理]