基于变标处理和分数阶傅里叶变换的运动目标检测算法  

A Target Detection Algorithm Based on Scaling Processing and Fractional Fourier Transform

作　　者：张南[1] 陶然[1] 王越[1] 

机构地区：[1]北京理工大学电子工程系,北京100081

出　　处：《电子学报》2010年第3期683-688,共6页Acta Electronica Sinica

基　　金：国家杰出青年科学基金(No.60625104);装备预先研究(No.51307060504)

摘　　要：针对线性调频脉冲压缩雷达检测高速和加速运动目标时受到距离徙动和多普勒频率徙动的影响,首先建立了回波信号模型,分析了回波信号徙动的特点,然后提出了一种基于变标处理和分数阶傅里叶变换的运动目标检测算法.该算法利用变标处理补偿距离徙动,利用分数阶傅里叶变换补偿多普勒频率徙动.仿真分析表明本文所提算法能够实现距离徙动和多普勒频率徙动的补偿,提高雷达对高速和加速运动目标的检测性能.It is known that detecting a high-speed and accelerating target is affected by range migration and Doppler frequency migration in the linear frequency modulation pulse compression radar.In order to solve this problem,the model of received signal is established and the characteristics of the received signal are analyzed firstly.Then a target detection algorithm based on the scaling processing and the fractional Fourier transform is proposed.With the proposed algorithm,the range migration is compensated via using the scaling processing,and the Doppler frequency migration is compensated by using the fractional Fourier transform.Therefore it is able to improve the detection performance of a high-speed and accelerating target.

关 键 词：距离徙动 多普勒频率徙动 变标处理 分数阶傅里叶变换 

分 类 号：TN911.72[电子电信—通信与信息系统]