线性调频信号在雷达中的应用  

Application of chirp signal in radar

作　　者：胡爱明[1] 胡可欣[1] 

机构地区：[1]中国电子科技集团公司第38研究所,合肥230031

出　　处：《航天电子对抗》2006年第5期54-57,共4页Aerospace Electronic Warfare

摘　　要：线性调频(LFM)信号是脉冲压缩体制雷达中广泛应用的大时宽带宽积信号,其突出优点是匹配滤波器对回波信号的多普勒频移不敏感。根据线性调频脉冲压缩信号的时域和频域特点,运用模糊函数对该信号的性能进行分析。LFM信号具有更高的距离、速度分辨率,以及更好的低截获概率特性。给出此类信号经匹配滤波压缩处理的过程、结果及工程实现。Chirp signal （LFM） is a kind of large time and band product signal used in pulse compression radars. It＇s advantage is non-sensitive to the Doppler shift of echo signal in the matching filter. The characteristics in both time and frequency fields of LFM compressed signal are introduced,and the capability of this signal is analyzed by ambiguity function. The LFM signal has a high resolution of range and speed, as well as low probability of intercept. The course,result and engineering implement of processing this kind signal by matching filtering are given.

关 键 词：线性调频信号 脉冲压缩 旁瓣抑制 匹配滤波 

分 类 号：TN957.51[电子电信—信号与信息处理]