基于WLS的OTHR短时自适应海杂波抑制方法  

Adaptive sea clutter suppression method for OTHR with short coherent integration time based on weighted least square

作　　者：严韬[1] 陈建文[1] 鲍拯[1] Yan Tao Chen J ianwen Bao Zheng(Key Research Laboratory, Air Force Early Warning Academy, Wuhan 430019, China)

机构地区：[1]空军预警学院三系重点实验室,武汉430019

出　　处：《华中科技大学学报（自然科学版）》2017年第8期20-25,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61471391)

摘　　要：基于高频海杂波的空间相关特性,从自适应滤波的角度提出了一种基于加权最小二乘(WLS)的天波超视距雷达(OTHR)短时自适应海杂波抑制方法.在自适应权值求解过程中,采用基于QR分解的直接数据域处理方法,避免传统基于相关矩阵求逆方法的数值稳定性较差的缺陷.结果表明:与现有的基于空间相关性的海杂波抑制方法相比,所提方法具有更优的杂波抑制性能,同时兼备对参考距离单元数要求更低、计算量更小、自适应能力更强的优点,工程适用性较强.实测数据处理分析验证了所提方法的有效性.Based on the spatial correlation property of high frequency sea clutter,an adaptive sea clutter suppression method for skywave over-the-horizon radar（OTHR）based on weighted least square（WLS）was proposed from the adaptive iltering theory.In the process of solving the adaptive weight,the direct data domain approach based on QR decomposition was employed,which avoids the drawback of poor numerical stability for the method of correlation matrix inversion.Compared with the existing methods which were also basing on spatial correlation property of sea clutter,the proposed method not only achieves a better clutter suppression performance,but also features a lower number of reference cells,fewer calculations and stronger adaptive capacity,so the method has comparatively strong practicality in engineering.The processing and analysis of the measured data verify the effectiveness of the proposed method.

关 键 词：天波超视距雷达 加权最小二乘 海杂波抑制 相干积累时间 相关性 

分 类 号：TN958.93[电子电信—信号与信息处理]