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电子学报  2014 

基于Radon-分数阶傅里叶变换的雷达动目标检测方法

DOI: 10.3969/j.issn.0372-2112.2014.06.006, PP. 1074-1080

Keywords: 动目标检测,距离徙动,多普勒徙动,长时间相参积累,Radon-分数阶傅里叶变换(RFRFT)

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Abstract:

长时间相参积累技术是提高雷达对微弱运动目标探测能力的重要手段之一,本文在分析动目标回波信号距离和多普勒徙动的基础上,提出基于Radon-分数阶傅里叶变换(RFRFT)的长时间相参积累方法.该方法根据预先设定的运动参数搜索范围,提取位于距离-慢时间二维平面中的目标观测值,然后在FRFT域进行匹配和积累,并通过构建的RFRFT域检测单元图实现对非匀速运动目标的检测.该方法能够同时补偿距离和多普勒徙动,有效抑制背景杂波和噪声,提高积累增益.仿真结果表明本文方法具有在强杂波中检测微弱动目标的能力.

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