基于霍夫变换的高速微弱目标检测算法

High-speed Weak Target Detection Based on Hough Transform

该文针对高速微弱目标检测提出一种快速的目标参数估计方法,首先分析了高速目标回波脉冲间距离单元走动的影响因素,指出回波间距离走动与积累时间近似为直线;其次利用霍夫变换(HT)可对直线进行检测的特点,分析了HT参数和目标初始距离和径向速度的关系,提出了一种并行HT(PHT)方法,该方法利用并行叠加原理能够提高HT运算速度,满足实时性的要求;最后给出了算法实现流程和仿真实例,仿真结果证明了算法的有效性。

For high-speed weak targets,a fast method of target parameter estimation is presented in this paper.After analyzing the factors which influence high-speed target,s range migration,it pointed out that the range migration exhibits a straight line with accumulation time.Then,using the feature of Hough Transform（HT） to detect straight line,the relationship between the parameters of HT and initial distance and initial radial velocity are analyzed and an improved method is proposed based on Parallel HT（PHT） which can improve operation speed and meet the needs of real-time processing by taking advantage of its parallel principle.Finally,the algorithm flowchart is given and the validity of this algorithm is verified with the simulation results.