稀布阵综合脉冲孔径雷达低距离旁瓣与距离高分辨技术

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干积累，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旁瓣的有效方法－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，提出通过步进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率较敏感的问题提出了一种简便

稀布阵综合脉冲孔径雷达低距离旁瓣与距离高分辨技术

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.