一种距离扩展目标的Hough变换检测器

针对宽带雷达信号得到的距离扩展目标在有较大运动速度时积累检测困难的问题，该文提出一种基于Hough变换的检测器(HTD)。利用距离扩展目标高分辨距离像信号的相邻回波之间信号具有较大相关系数这一特点，在互相关序号与相关时间2维平面使用Hough变换进行积累来检测目标。理论推导表明Hough变换检测器不需要目标散射中心分布的先验知识和目标的运动信息，具有恒虚警(CFAR)性能。计算机仿真实验表明Hough变换检测器具有比不依赖散射中心分布信息的广义似然比(NSDD-GLRT)检测器更好的检测能力。

A Hough Transformation Detector for Range Spread Target

For the issue that the range spread targets got from the wideband radar signal are difficult to integrate for detect by the large velocity of target, a Hough Transformation Detector (HTD) is developed. Adjoin high resolution radar range profiles of range spread target processes high correlation coefficient. Using this characteristic, signal energy integrated by Hough transformation in cross-correlation order and correlation time two dimensional plane and target detect are carried. Theory analysis show HTD is non-dependent on target scatter distribution information and target moving information and processes Constant False Alarm Ratio (CFAR) performance. Computer simulation experiment show HTD achieves better detection performance than Non-Scatterer Density Dependent Generalized Likelihood Ratio Test (NSDD-GLRT) detector.