基于分数阶傅里叶变换的线性调频脉冲时延估计特性分析  

Performance Analysis of Time Delay Estimation for Linear Frequency-modulated Pulse Based on Fractional Fourier Transform

作　　者：邓兵[1] 王旭[1] 陶然[2] 刘贤忠[1] 

机构地区：[1]海军航空工程学院电子信息工程系,山东烟台264001 [2]北京理工大学电子工程系,北京100081

出　　处：《兵工学报》2012年第6期764-768,共5页Acta Armamentarii

基　　金：国家自然科学基金项目(60902054);中国博士后科学基金项目(201003758;20090460114)

摘　　要：以线性调频脉冲压缩的时域特性为参照,分析了基于分数阶傅里叶变换的LFM脉冲时延估计的分数阶傅里叶域特性,并对比了两者在数字信号处理上的差异。可以发现两者在输出信噪比、脉宽压缩比、峰值振幅比的特性基本一致,而在数字实现上,后者精度往往更高,所需数据率可以更低,因此,具有更为广阔的应用前景。The time delay estimation for linear frequency-modulated（LFM） pulse based on the fractional Fourier transform was analyzed in the fractional Fourier domain,taken the time domain performance of linear frequency-modulated pulse compression as reference.Also,the difference between these two methods was discussed in digital signal processing.It is found that they have almost the same output signal to noise ratio,pulse-width compression ratio and peak amplitude ratio.Furthermore,the latter has higher precision in the time delay estimation in digital implementation,needs less data rate,and has more potential.

关 键 词：信息处理技术 时延估计 线性调频脉冲 分数阶傅里叶变换 

分 类 号：TN911.7[电子电信—通信与信息系统] TN957.51[电子电信—信息与通信工程]