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提高弱目标检测的一种新方法
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摘要
为提高弱目标的检测能力及改善时间方位历程显示(BTR)的方位分辨力,本文提出了一种将主模式抑制(Dominant Mode Rejection,DMR)的自适应波束形成与子带峰值能量检测(Subband Peak Energy Detection,SPED)相结合的检测方法。该方法利用了DMR自适应算法得到高分辨率的频率方位谱,再通过SPED算法,利用目标信号峰值的"空间一致性"特点,对每个子带的局部峰值累加求和,加强了目标信号的局部峰值,提高了弱目标的检测能力,改善了时间方位历程显示的方位分辨力。计算机仿真及实验数据处理结果表明,两种方法相结合能够有效的提高弱目标检测能力和时间方位历程显示(BTR)的方位分辨力。
In order to improve the ability to detect weak targets and improve the azimuth resolution to Bearing Time Record.this paper presents a method for detecting the Dominant Mode Rejection(DMR) beamforming combination with Subband Peak Energy Detection(SPED).The method utilizes an adaptive algorithm DMR high-resolution spatial energy spectrum,and through the SPED algorithm,using the characteristics of the target signal spatial coherence,cumulative sum of the local peak of each subband,to strengthen the local peak of the target signal,improve the detection of weak targets and improve the BTR azimuth resolution. Computer simulation and experimental result show that the combination of the two algorithms can effectively improve the weak target detection capability and improve the azimuth resolution to Bearing Time Record.
引文
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