星载GMTI雷达系统及其空时自适应信号处理  

Spacborne Gmti Radar System and Space-time Adaptive Signal Processing

作　　者：云日升[1] 张云华[1] 江碧涛[2] 康雪艳[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100080 [2]北京市遥感信息研究所,北京100085

出　　处：《遥感技术与应用》2006年第1期55-60,共6页Remote Sensing Technology and Application

摘　　要：地面动目标检测(GMT I)是脉冲多普勒雷达的重要应用领域之一。星载GMT I雷达系统比传统的机载系统具有更强的适应性和能够获得更好的检测性能而受到广泛关注。主要就星载分布式稀疏孔径GMT I雷达系统的系统特点及其空时自适应信号处理(STAP)方法作了较为深入的分析,基于星载分布式均匀线性阵列(ULA)GMT I雷达系统参数获得了典型的STAP算法信杂噪比(SINR)损失特性和性能比较。Pulse Doppler radar provides important application in GMTI. Space-based GMTI radar system is widely given attention because its detection performance and adaptability excel that of airborne system. In this paper, based on the characteristics ancl recent research of space based distributed sparse aperture GMTI radar system, the characteristics of space-based GMTI radar system are deeply investigated. The antenna pattern of sparse aperture space-based GMTI radar ancl the full-DOA optimum STAP SINR loss characteristics are provided and analyzed. By analyzing sparse aperture space-based GMTI radar space-tine 2D filtering algorithm, the RD-STAP （reduced dimension STAP） algorithms including ADPCA, post- Doppler ancl PRI-staggerecl STAP algorithm are introduced. Based on the space-based distributed uniform lineal array GMTI radar system parameters, the performance compare of the STAP algorithms are obtained. Results show that the RD STAP algorithms obtain the satisfied SINR loss performance with limited training samples. In the end, the prospects of the space-based GMTI radar system and signal processing research are provided.

关 键 词：星载雷达 地面动目标检测(GMTI) 分布式稀疏孔径 空时自适应处理 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]