一种基于最大信杂比的MTD滤波器设计算法  

An Algorithm of MTD Filter Based on Maximum Signal-to-Clutter Ratio

作　　者：贾可新 柳桃荣[1] 

机构地区：[1]中国电子科技集团公司第三十八研究所,安徽合肥230088

出　　处：《雷达科学与技术》2014年第5期506-509,共4页Radar Science and Technology

摘　　要：为了在充分抑制杂波的同时保持最大输出信杂比,提出了一种基于最大信杂比准则的MTD滤波器设计算法。该算法首先将杂波建模为大量窄带杂波的线性叠加,并将这些窄带杂波均匀放置在脉冲重复频率的范围内。然后通过实际频响与期望频响的比较,自适应地改变窄带杂波的功率强度,利用最大信杂比准则获得最佳滤波器系数。这种MTD滤波器设计算法的收敛速度快,能够在零频附近形成宽而深的零陷,具有较高的实用性。仿真实例验证了所提算法的有效性。To suppress clutters and maximize the output signal-to-clutter ratio（SCR）,a moving target detection（MTD）filter algorithm based on the maximum SCR rule is proposed in this paper.This algorithm firstly models the received clutters as a linear superimposition of many narrowband clutters,and uniformly places these narrowband clutters in the range of pulse repetition frequency.By comparing the real with ideal frequency responses of the filter,the powers of these narrowband clutters are controlled adaptively.Based on the maximum SCR rule ,the optimal filter coefficients are computed.The proposed algorithm not only has wide and deep null at the zero region,but also has high convergence speed.Therefore,it is very practical. The simulation examples are presented to show the effectiveness of the proposed algorithm.

关 键 词：MTD滤波器组 杂波抑制 最大信杂比准则 脉冲重复频率 

分 类 号：TN958.2[电子电信—信号与信息处理]