直升机载战场侦察雷达空时自适应处理实用方法研究
RESEARCH ON PRACTICAL APPROACHES TO SPACE-TIME ADAPTIVE PROCESSING FOR HELIBORNE BATTLEFIELD SURVEILLANCE RADAR
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摘要: 针对直升机平台的特点,本文研究了直升机载战场侦察雷达杂波抑制与平台运动补偿的可能有效途径,主要包括传统的DPCA方法、-ADPCA方法、-STAP方法、随机抽取单元辅助通道-STAP方法和扩展的-STAP方法。理论分析与计算机仿真表明,扩展的-STAP方法更适合于多种非理想情况(如:阵元幅相误差、载机偏航、航速误差等)和电子战环境,具有更强的杂波与干扰抑制能力和更强的误差鲁棒性,而且,该方法既可用于相控阵雷达,又可用于连续型天线系统,是直升机载战场侦察雷达有效地实现杂波抑制与平台运动补偿的可取方案。Abstract: This paper studies the optional effective methods for clutter suppression and platform motion compensation in Heliborne Battlefield Surveillance Radar (HBSR), which includes the traditional DPCA method, -ADPCA method, -STAP method, -STAP method with random-element auxiliary channel and extended -STAP method. A comparative analysis is performed. Theoretical analysis and computer simulation further illustrates that the extended -STAP method is suitable for modern electronic warfare environment. It has stronger clutter and jamming rejection performance in the concentrated jamming environment and stronger error robustness in the non-ideal real environment (i.e., array element. amplitude and phase errors, helihorne crab, velocity error, etc).In addition, this method can be imple- merited easily for phased array heliborne radar as well as continuous antenna system. Therefore the extended -STAP approach is feasible and available for clutter suppression and platform motion compensation in HBSR.
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