变换域窄带干扰抑制技术中变换基的选取研究  

Research of the selection of transform basises in transform domain narrowband interference suppression technology

作　　者：李婷婷[1] 张春泽[1] 胡红[1] 

机构地区：[1]北京卫星信息工程研究所,北京100086

出　　处：《电子设计工程》2014年第23期145-147,150,共4页Electronic Design Engineering

摘　　要：基于变换域窄带干扰抑制技术的基本思路,研究了几种常用变换基的性质及其对典型窄带干扰形式的识别能力。通过仿真对比了典型窄带干扰在各变换域的谱型,并以CV系数作为标准对各变换基窄带干扰抑制能力进行了比较。仿真结果表明,重叠变换对于单音、窄带等平稳干扰信号的识别能力较优,而对扫频干扰这种非平稳干扰类型,则更适合在分数阶傅里叶变换域进行检测和识别。Based on the basic ideas of transform domain narrow-band interference suppression technique, the properties of several common transform basises are studied. The ability of transform basises to recognize typical form of narrow-band interference is also dicussed in this paper. The simulation compares the spectrum of typical type of narrow-band interference in different transform domain.The comparison of Interference suppression ability between different transform basises is done in this paper with CV coefficient as standard.The simulation results show that Lapped Transform has better identification ability for stationary interference,such as singleton interference and narrow-band interference. Nevertheless Fractional Fourier Transform is more suitable for detecting non-stationary interference such as sweeping frequency interference.

关 键 词：变换基 干扰识别 FFT 重叠变换 分数阶傅里叶变换 

分 类 号：TN911.7[电子电信—通信与信息系统]