基于微波多普勒雷达谱特征的目标检测与抑制方法

基于微波多普勒雷达谱特征的目标检测与抑制方法 Target Detection and Suppression Based on Spectral Characteristics of Microwave Doppler Radars 陈泽宗 CHEN Zezong 1 2 first-author 易盛 YI Sheng 1 赵晨 ZHAO Chen 1 陈曦 CHEN Xi 1 金燕 JIN Yan 1 谢飞 XIE Fei 1 武汉大学电子信息学院 武汉大学电子信息学院 Electronic Information School,Wuhan University Electronic Information School,Wuhan University 武汉大学地球空间信息技术协同创新中心 武汉大学地球空间信息技术协同创新中心 Collaborative Innovation Center for Geospatial Technology,Wuhan University Collaborative Innovation Center for Geospatial Technology,Wuhan University 利用含目标信号的海杂波多普勒谱幅度显著增强的特点,采用频域滑窗比较不同距离元多普勒谱幅度的方法检测有目标的距离元,得到雷达探测海域中目标的位置,并对被干扰的数据进行目标抑制处理.实测数据处理结果表明,目标检测结果和实际情况一致,对目标所在距离元数据的目标抑制处理减小了由目标引起的多普勒谱中心频率的偏差,提高了反演结果的准确度,验证了此算法的有效性. Based on the fact that the amplitude of Doppler spectra significantly enhances when target exists in the radar illumination area,the location of target is found and suppressed by comparing spectra amplitude from different range gates making use of a sliding window in frequency domain. Processing of the measured data shows that the detection results are consistent with the fact,and the suppression algorithm reduces the error in center frequency estimation and improves the accuracy of inversion algorithm. The effectiveness of this algorithm is verified by measured data. 微波多普勒雷达 海杂波 多普勒谱 目标检测与抑制 microwave Doppler radars sea clutter Doppler spectrum target detection and suppression 10.14188/j.1671-8836.2015.05.009 TN958 国家自然科学基金资助项目（41376182）;中央高校基本科研业务费专项资金资助项目（2042014kf0028）;湖北省科技支撑计划项目（2014BEC057）;国家海洋局数字海洋科学技术重点实验室开放基金（KLD0201401）资助 2015-05-01 2021-03-31 5 61