稀布阵综合脉冲孔径雷达低距离旁瓣与距离高分辨技术  

Low-Range-Sidelobe and High-Range-Resolution Techniques for Sparse－Array Synthetic Impulse and Aperture Radar

作　　者：陈伯孝[1] 张守宏[1] 

机构地区：[1]西安电子科技大学雷达信号处理重点实验室,西安710071

出　　处：《电子学报》1998年第9期29-33,共5页Acta Electronica Sinica

基　　金：国防科技预研基金

摘　　要：稀布阵综合脉冲孔径雷达（SIAR）采用多个频率信号实现各向同性照射而不需要波束扫描，因此可以获得长时间相平积累，有利于对微弱目标（尤其是隐身目标）的探测，本文提出了一种降低其距离劳瓣的有效方法──脉间（组）频率编码捷变，分析其机理同时为了提高距离分辨能力，提出通过步过频率来增大发射信号带宽，通过SIAR的脉冲综合处理和步进频率综合处理以提高脉冲压缩比。并针对步进频率对速度较敏感的问题提出了一种简便的预补偿方法.最后给出了该雷达初步的实验结果．Sparse-array Synthetic Impulse and A perture Radar (SIAR) can isotropicly radiate by etnploying multiple frequencies (synthetic pulse) and multiple antennas(synthetic antenna) without beam spanning. The detection ability to low RCS targets(especially to stealthy targets) is improved by use of VHF band and long-time coherent integration. An effective methed to reduct its range sidelobes with frequency-coding agility among these frequencies is presented. Also, the bandwidth of transmitting signals is raised by stepped-frequencies. The high range resolution is obtained by stepped-dfrequency synthesis and impulse synthesis of SIAR. A simple appoch for comensating the effect of target velocity on stepped frequencies is presented. Finally, the preliminary test is given.

关 键 词：稀布阵 脉冲孔径雷达 SIAR 雷达性能 

分 类 号：TN958[电子电信—信号与信息处理]