DSSS系统中基于分数阶傅立叶变换的扫频干扰抑制算法  

Frequency Sweeping Interference Suppressing in DSSS System Using Fractional Fourier Transform

作　　者：齐林[1] 陶然[1] 周思永[1] 王越[1] 

机构地区：[1]北京理工大学电子工程系

出　　处：《电子学报》2004年第5期799-802,共4页Acta Electronica Sinica

基　　金：国家自然科学基金 (No .69972 0 0 3)

摘　　要：本文提出了一种基于分数阶傅立叶变换的DSSS系统中扫频干扰的自适应抑制算法 ,分析了分数阶傅立叶域中扫频干扰的检测和抑制的基本原理 ,并给出了相应的干扰抑制接收机的结构 ,性能分析表明 ,该方法可获得明显的信噪比改善及较好的误码率性能 ,和其他基于二维时频分析工具的滤波算法相比 ,降低了计算的复杂度 ,其实现更为简便 .An algorithm for the suppressing of frequency sweeping interference in DSSS system using fractional Fourier transform is proposed in this paper. The basic concepts of interference detection and suppressing in fractional Fourier domain are introduced and two kinds of DSSS receiver with adaptive time-varying excision filters are also provided. The performance analysis have shown that remarkable improvement of SNR and BER are obtained and compared with other two dimensional time-frequency interference suppressing algorithms, it is easy in computation and simple in implementation.

关 键 词：直接序列扩频 干扰抑制 分数阶傅立叶变换 

分 类 号：TN911.42[电子电信—通信与信息系统]