FFT-MTD滤波器组优化设计与仿真  

Optimized Design and Simulation for FFT-MTD Filter Banks

作　　者：周亚飞[1] 赵修斌[1] 邹鲲[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《现代防御技术》2011年第2期160-163,175,共5页Modern Defence Technology

基　　金：陕西省自然科学基础研究计划项目(SJ08F06)

摘　　要：介绍了用FFT算法实现雷达信号动目标检测(MTD)的方法,为提升MTD在强杂波环境下的检测性能,对加权FFT优化MTD时窗函数的选取进行了讨论,比较了6种窗函数加权时FFT等效多普勒滤波器组的幅频特性和改善因子,得出了适合于MTD的最佳窗函数,并针对某型雷达信号体制进行了仿真分析和验证,结果表明优化方法增强了MTD在杂波背景下的检测性能。The method of detecting moving target in radar signal processing system with FFT is introduced. In order to improve the performance of MTD in strong clutter environment, the optimal window for FFT-MTD is discussed. The frequency responses and improving factors of MTD filter banks weighted with 6 kinds of window functions are compared and the optimal window function suitable for MTD is gained The simulation result indicates that the MTD performance is improved with the optimized design.

关 键 词：雷达信号处理 快速傅里叶变换 动目标检测 杂波抑制 加窗 

分 类 号：TN957.51[电子电信—信号与信息处理] TN713[电子电信—信息与通信工程]