强海杂波背景下目标信号的自适应频谱窗检测

Adaptive Target Signal Spectrum Window Detection with Strong Sea Clutter

针对通过频谱加固定矩形窗的频域滤波检测导弹目标信号的方法对强海杂波适应性较差的问题,提出了强海杂波背景下导弹目标信号的自适应频谱窗检测方法。该方法在实时估计的海杂波上限截止频率和理论上弹目最大交会速度的基础上,构建频带范围及形状适应于当前频谱、具有一定自适应性的频谱窗来抑制强海杂波对提取导弹目标谱峰信息的干扰。仿真表明,该方法能有效抑制强海杂波对提取导弹目标信号谱峰信息的干扰,提高了系统在强海杂波背景下检测导弹目标的性能。

Aiming at the poor performance of frequency domain filtering method by fixed rectangle window to detect target signal with strong sea clutter,the adaptive spectrum observation window was put forward in this paper.The method built adaptive spectrum observation window ,whose band range and shape varied with the real-time estimated upper cut-off frequency of sea clutter and the max intersection speed in theory,to restrain strong sea clutter interfering the estimation of spectral peak information of the missile target signal.Simulation revealed that this method could restrain strong sea clutter interfering the estimation of spectral peak information of the missile target signal effectively and improve the performance of system in detecting the high-speed small target in strong sea clutter.