现代电子技术2012，Vol.35Issue(15)：31-33,36,4.
经典谱估计在短突发信号频谱细化中的特性分析
Analysis of classical spectral estimation used in spectral zooming of short burst signals
尹海昌1
作者信息
- 1. 广东科学技术职业学院,广东珠海519090
- 折叠
摘要
Abstract
To compare the impacts of barrier effect and truncation effect existing in classical spectral estimation on spectral estimation, the performance of such classical spectral estimation algorithms as zero padding FFT. shifting DFT, CZT and Zoom-FFT were studied and simulated by Matlab. Finally, the paper analyzed the limit of these algorithms in spectral zooming of short burst signals. Especially in the spectral zooming of multi-frequency-component signals, even the large subdivision multiples can not differentiate two adjacent frequencies, when the isolation between frequencies is small and the length of the signal is short. To reduce energy leakage and spectral interference caused by truncation effect, a spectral zooming estimation for finite length data is given by means of modern spectral estimation algorithm. The experimental results proved the correctness of the theoretical inference.关键词
经典谱估计/截断效应/栅栏效应/短突发信号/频谱细化Key words
classical spectral estimation/ truncation effect/barrier effect/ short burst signal/ spectral zooming分类
信息技术与安全科学引用本文复制引用
尹海昌..经典谱估计在短突发信号频谱细化中的特性分析[J].现代电子技术,2012,35(15):31-33,36,4.
