Space Time Adaptive Processing Technique for Airborne Radar: An Overview of Its Development and Prospects
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摘要:
空时自适应处理(Space Time Adaptive Processing, STAP)技术通过空域和时域2维联合自适应滤波的方式,实现了机载雷达对强杂波与干扰的有效抑制。作为提升机载雷达性能的一项关键技术,近年来备受雷达领域的关注与世界军事强国的重视。该文从方法、实验系统和应用3个方面回顾了空时自适应处理技术的发展过程和研究现状,着重阐述了其发展过程中遇到的关键技术问题,介绍了STAP技术在装备上的应用情况,并讨论了下一步的发展趋势,提出了需要或值得进一步研究的方向。
Abstract:Used to suppress strong clutter and jamming in airborne radar data, Space Time Adaptive Processing (STAP) is a multidimensional adaptive filtering technique that simultaneously combines signals from elements of an antenna array and multiple pulses of coherent radar waveforms. As a key technology for improving the performance of airborne radar, it has attracted much attention in the field of radar research and from powerful military nations in recent years. In this paper, the research and development status of STAP technology is reviewed including methodologies, experimental systems, and applications and we focus on the key technical problems encountered during its development. Then, the application of STAP technology in equipment is introduced. Finally, the next development trends, future directions, and areas worthy of further research are presented.
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表 1 典型STAP方法
Table 1. Typical STAP methods
序号 关键技术问题 典型STAP方法 1 运算量和误差问题 降维STAP方法 降秩STAP方法 2 非均匀杂波问题 功率非均匀抑制法 非均匀检测器 直接数据域法 模型参数化STAP方法 知识辅助STAP方法 稀疏恢复STAP方法 混合STAP方法 3 非平稳杂波问题 1维补偿类方法 2维补偿类方法 空时内插类方法 权值调整类方法 逆协方差矩阵预测类方法 3D-STAP方法 4 空时自适应检测问题 基于GLRT准则的STAD 基于Rao准则的STAD 基于Wald准则的STAD 表 2 国内外典型STAP实时处理系统
Table 2. Typical STAP real-time processing systems at home and abroad
时间(年) 国家 机构 STAP系统 1994 中国 西安电子科技大学 机载预警雷达实验系统,由大约100片DSP21060/ADSP21062构成 1996 美国 MHPCC(Maui High Performance Computer Center) MIT 采用IBM超级计算机SP2,主要用于处理Mountain Top实测数据 1996 美国 AFRL MCARM实验系统:L波段,28个Paragon处理节点 2000 美国 Raytheon UESA (UHF Electronically Scanned Array)计划,UHF频段电扫阵列,主要用于预警机雷达升级改造试验 2002 美国 MIT KASSPER项目,基于知识辅助的机载雷达实验验证 2004 美国 AFRL 自组织智能雷达系统AIRS,将人工智能与知识辅助相结合的新一代雷达 2005 美国 AFRL 无人机联合侦察与作战计划,充分运用了KASSPER和AIRS实验的成果 2006 中国 空军预警学院 机载雷达通用可编程STAP系统,实现了三/四通道机载预警雷达实测数据的实时处理 2008 英国 QinetiQ Malvern PACER (Phased Array Concepts Evaluation RIG)雷达原理样机,32个自适应接收通道 2012 中国 中国电科集团公司14所/38所 多通道机载预警雷达STAP系统 -
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