一种线性调频信号超低旁瓣脉冲压缩方法  

An LFM Range Compression Method for Extraordinarily-low Range Sidelobes

作　　者：李涛[1] LI Tao(Key Laboratory of Avionic Information System Technology,China Electronics Technology GroupCorporation（CETC）,Chengdu 610036,China)

机构地区：[1]中国电子科技集团公司航空电子信息系统技术重点实验室,成都610036

出　　处：《电讯技术》2018年第5期545-551,共7页Telecommunication Engineering

摘　　要：雷达脉冲压缩希望具有超低距离旁瓣的特征,线性调频信号采用加窗方式可达到约-35 d B的距离旁瓣电平。基于超低旁瓣电平信号设计方法,在不考虑信噪比损失条件下,提出了一种新的超低旁瓣的脉冲压缩方法,基本思想是针对给定线性调频信号,频率滤波权值采用超低频旁瓣频域信号与线性调频信号频域的比值,可以将接收端旁瓣电平输出最低到-120 d B。同时,从理论上和数值结果中分析了信噪比损失、延迟敏感性等问题。A radar system desires low range sidelobes and Linear Frequency Modulated（ LFM） waveforms can reach a-35 d B Peak Sidelobe Level（ PSL） with a window in range compression. Based on a waveform design method for extraordinarily-low range sidelobes and ignorant of signal-to-noise ratio（ SNR）loss,this paper proposes a novel range compression method for extraordinarily-low range sidelobes. The concept is to use a range compression weight as the ratio of the frequency domain signal to the LFM frequency domain,yielding a-120 d B sidelobe output. The SNR loss and sensitivity to delay are also analyzed according to theory and numerical simulations.

关 键 词：线性调频信号 脉冲压缩 超低旁瓣 

分 类 号：TN957.51[电子电信—信号与信息处理]