一种雷达信号处理的检测算法  

Detection algorithm of a radar signal processing

作　　者：周治平[1] 张彩虹[1] 库亮[1] 

机构地区：[1]江南大学通信与控制学院,江苏无锡214122

出　　处：《激光与红外》2010年第4期434-437,共4页Laser & Infrared

摘　　要：由于在雷达弱小目标的检测和跟踪过程中,目标是典型的弱小目标且回波较弱,常规的检测算法难以奏效。针对此特点提出采用雷达弱小目标先跟踪后检测的方案,通过对雷达弱小目标长时间积累检测问题进行界定,并根据信号的特殊性对雷达弱小目标进行检测。首先通过进行目标预测,并在此基础上对检测出的目标进行目标跟踪。利用目标的运动沿各种可能轨迹积累能量的特征,对各个能量积累值进行检测判断,从而检测出真实目标并提取出目标的运动轨迹。文中首先对动态规划应用于弱小目标检测的算法进行了详细的描述,同时,对动态规划应用于弱小目标方法的性能也做了进一步分析,并对检测概率和虚警概率关系进行了较详细的推导。最后,通过仿真实验和性能分析得出了门限与虚警概率的关系。In the radar targets detection and tracking process,because the target echo is a weak and typical small target,the detection algorithm routine is difficult to work well.After we defined the problem by making a long accumulation of small target detection radars and with the signal specificity,we propose the track-before-detect（TBD） scheme.In this paper,the target prediction is carried on firstly,and then the targets are tracked in this foundation.With the features of target movement along the various possible trajectories of energy accumulation,we make test to determine energy accumulation value,then detect the true target and extract the target trajectory.In the paper,the algorithm of dynamic programming applied to small target detection is description firstly,then the performance of this method is carried out a detailed analysis,and detection probability and false alarm probability expression is conducted a more detailed derivation.At last,threshold and the relationship between the probability of false alarm is come out by simulation and performance analysis.

关 键 词：动态规划 先跟踪后检测 小目标 性能分析 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]