电子设计工程
電子設計工程
전자설계공정
ELECTRONIC DESIGN ENGINEERING
2014年
23期
145-147,150
,共4页
李婷婷%张春泽%胡红
李婷婷%張春澤%鬍紅
리정정%장춘택%호홍
变换基%干扰识别%FFT%重叠变换%分数阶傅里叶变换
變換基%榦擾識彆%FFT%重疊變換%分數階傅裏葉變換
변환기%간우식별%FFT%중첩변환%분수계부리협변환
transform basis%interference identifucation%FFT%lapped transform%fractional fourier transform
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。
基于變換域窄帶榦擾抑製技術的基本思路，研究瞭幾種常用變換基的性質及其對典型窄帶榦擾形式的識彆能力。通過倣真對比瞭典型窄帶榦擾在各變換域的譜型，併以CV繫數作為標準對各變換基窄帶榦擾抑製能力進行瞭比較。倣真結果錶明，重疊變換對于單音、窄帶等平穩榦擾信號的識彆能力較優，而對掃頻榦擾這種非平穩榦擾類型，則更適閤在分數階傅裏葉變換域進行檢測和識彆。
기우변환역착대간우억제기술적기본사로，연구료궤충상용변환기적성질급기대전형착대간우형식적식별능력。통과방진대비료전형착대간우재각변환역적보형，병이CV계수작위표준대각변환기착대간우억제능력진행료비교。방진결과표명，중첩변환대우단음、착대등평은간우신호적식별능력교우，이대소빈간우저충비평은간우류형，칙경괄합재분수계부리협변환역진행검측화식별。
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.
