双树复数小波变换在杂波抑制处理中的应用  

Dual-Tree Complex Wavelet Transform Applications in Clutter Suppression

作　　者：任渊[1] 程远[1] 刘溶[1] REN Yuan;CHENG Yuan;LIU Rong(No. 724 Research Institute of CSIC, Jiangsu Nanjing 211106, China)

机构地区：[1]中国船舶重工集团公司第724研究所,江苏南京211106

出　　处：《现代防御技术》2018年第3期93-97,111,共6页Modern Defence Technology

摘　　要：针对湮没在杂波环境下的目标检测,提出一种利用双树复数小波变换对回波信号进行分解,通过相关性滤波再进行信号重构,抑制海杂波,其后采用动目标检测的方法抑制地物杂波信号。只采用动目标检测的方法仍有海杂波的影响,在通过双树复数小波变换的杂波抑制方法后作动目标检测处理能有很好的抑制效果,能检测出湮没在杂波中的小目标。将其应用到某型雷达的信号处理系统中,仿真结果表明该方法能有效降低杂波的影响。Considering the target detection in clutter environment,a method using dual tree complex wavelet transform for received echo is presented. By spatial correlation thresholding after decomposing signal,the signal to suppress the sea clutter is reconstructed. A method using moving target detection to suppress the ground clutter is proposed. When the moving target detection（ MTD） method is used,the sea clutter effects still exist. By using MTD method after dual tree complex wavelet transform,a good suppression effect can be got and small target in clutter can be detected. This method is applied to a radar signal processing system,and the simulation results show that this method can effectively reduce clutter.

关 键 词：双树复数小波变换 动目标处理 相关性处理 阈值 海杂波 地物杂波 

分 类 号：TN95[电子电信—信号与信息处理]