基于OMP算法的风轮机杂波滤除研究  

A Study on Wind Turbine Clutter Mitigation Based on OMP Algorithm

作　　者：曹永贵 方宇[1] 吴道庆[1] CAO Yonggui;FANG Yu;WU Daoqing(Nanjing Research Institute of Electronics Technology, Nanjing 210039 , China)

机构地区：[1]南京电子技术研究所

出　　处：《现代雷达》2019年第5期16-21,共6页Modern Radar

摘　　要：针对雷达在探测目标过程中风电场杂波的抑制问题,提出了一种基于正交匹配追踪(OMP)的杂波抑制算法。首先,建立风轮机的回波模型,分析了回波时频域特征;然后,推导了多径回波模型下的风轮机回波,介绍了风电场回波的特点;最后,给出了OMP算法的理论基础和实现步骤。该算法中,通过建立一个回波字典矩阵,寻找矩阵中最匹配原子,从目标信号中减去最匹配原子,并通过循环操作滤除杂波。实验结果表明:该方法能够有效滤除风轮机杂波。Aiming at the suppression of wind farm clutter in the process of detecting targets, a clutter suppression algorithm based on orthogonal matching pursuit ( OMP) is proposed in this paper. Firstly, the echo model of wind turbine is established in this paper, and the time-frequency domain characteristics of echo are analyzed. Then, the wind turbine echo under the multipath echo model is derived and the characteristics of the wind farm echo are introduced. Finally, the theoretical basis and implementation steps of the OMP algorithm are presented. The most matching atom in the matrix is found in an echo dictionary matrix established in this algorithm, which is subtracted from the target signal and the clutter is filtered out by the cyclic operation. Experimental results show that this method can effectively filter wind turbine clutter.

关 键 词：风轮机 杂波滤除 正交匹配追踪算法 短时傅里叶变换 微多普勒特征 

分 类 号：TN955[电子电信—信号与信息处理]