一般非综合孔径雷达方位超分辨研究

一般非综合孔径雷达的方位分辨率受天线波束宽度的限制。要突破这种限制需要采用方位超分辨技术。该文介绍和分析了3种一般非综合孔径雷达的方位超分辨方法，包括去卷积法、角度权重法和相控阵雷达的相位权重法。对这些方法的性能进行了比较性研究，给出了数值仿真的结果。研究表明，去卷积法只适合于信噪比大于30dB的场合。在信噪比小于15dB时，角度权重法和相位权重法仍具有较好的方位超分辨效果。该文还从信息的角度分析了方位超分辨的实质，探讨了实现方位超分辨的可能途径。

Angular Super-resolution for Real Aperture Radars

Angular resolution of a real aperture radar is limited by the beam width of the radar antenna.Techniques for resolution enhancement beyond the limitation are called angular superresolution techniques.In this paper,three angular super resolution methods for real aperture radar are reviewed,including the deconvolution method,the phase weighting method and the angle weighting method.Performance comparison of different methods is carried out.Numerical simulation shows that the deconvolution method is valid only when signal to noise ratio (SNR) is higher than 30 dB;however,the phase weighting method and the angle weighting method can achieve better super resolution performance even when SNR is lower than 15 dB. The essentials of the azimuth super resolution technique from the viewpoint of information are also discussed.Based upon these essentials,the possible ways of realizing angular super resolution are proposed.