随机LFM脉冲信号合成距离像方法  

A Method of Synthesizing Range Profile with a Random LFM Pulse Signal

作　　者：陈行勇[1] 

机构地区：[1]91404部队,秦皇岛066001

出　　处：《中国电子科学研究院学报》2016年第6期636-641,共6页Journal of China Academy of Electronics and Information Technology

摘　　要：随机信号成像雷达结合了宽带成像和随机信号雷达技术,具有十分优良的低截获概率和抗射频干扰等特性。针对随机脉冲信号雷达合成距离像问题,给出了随机LFM脉冲信号一般模型,推导了基于随机LFM脉冲信号的合成距离像方法,分析了随机二相、脉位、脉宽、重频、调频极性等随机调制对合成距离像的影响,并从距离像移位和幅度失真等方面,分析了运动目标多普勒效应对合成距离像的影响,证明了随机LFM脉冲信号可以用于雷达合成距离像,最后对信号模型的雷达合成距离像性能、多普勒效应进行了仿真计算,验证了理论分析。Radom signal imaging radar combines the technologies of wide-band imaging and random sig- nal radar, which brought about such superiorities as very good low probability of interception and radio- frequency anti-interfere. As for the problem of synthesizing range profile with random pulse signal radar, a general model of random LFM pulse sharing signal is built. Then, a method of synthesizing range pro- file is derived with random LFM pulse signal, and the effect on synthesizing range profile is analyzed which caused by random modulations, including random binary phase, random pulse position, random pulse width and random pulse repetition frequency and random polarity linear frequency modulations. Doppler Effect on synthesizing range profile of moving target is analyzed, including range profile shift and amplitude distortion. Some simulations on radar imaging performance and Doppler Effect are provided for verified the theoretic analysis.

关 键 词：线性调频 随机信号雷达 高分辨距离像 多普勒效应 傅里叶变换 

分 类 号：TN959.17[电子电信—信号与信息处理]