高速运动雷达弱小目标检测方法研究

Detection algorithm for radar high speed weak targets

针对强杂波下高速运动的雷达弱小目标的特点,提出了一种基于短时滑窗相参积累和改进动态规划的检测前跟踪相结合的算法。首先,将雷达的回波信号构成一个先入先出的队列,进行短时滑窗相参积累。其次,在航迹跟踪时采用了基于改进动态规划的检测前跟踪算法,并且在原来的状态转移的基础上又对后续状态进行了估计,从而降低了相邻两帧间目标强度起伏的影响。实测数据证明此算法检测性能好,计算量较小,实际可行。

A short time slip window coherent integration and track-before-detect （TBD） based algorithm is proposed for the detection of radar high speed weak targets, the presented algorithm is based on short time slip window coherent integration and dynamic programming. Firstly, radar echoes are formed into a first in first out queue, and short time slip window coherent integration is implemented. Secondly, an improved track-before-detect （TBD） algorithm based on dynamic programming is performed to detect the target trace. Meanwhile the cascade transform states are estimated to reduce the influence of fluctuating target amplitude on detection performance. The simulation of real data shows the feasibility and efficiency of this algorithm in reducing computation as well as improving the detection performance of weak radar targets.