摘要
FFT(快速傅里叶变换)是频谱分析的核心。本文讨论提高FFT速度和精度的方法,以此为基础实现的频谱分析,其速度和精度均达到很高指标。其中频谱幅值误差小于1％,1024点复数FFT时间小于250ms,32段谱分析时间仅需5s。
FFT(Fast Fourier Transform)is the basis of spectrum analysis. This paper gives out a method which can improve the speed and accuracy of FFT. The spectrum analysis based on the proposed method is of a high level: the amplitude error of spectrum is less then 1 % , the time of completing 1024 compler points FFT and 32 segments spectrum analysis is less then 250ms and only 5 seconds respectively.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
1992年第2期51-57,共7页
Journal of Chongqing University
关键词
数据处理
信号处理
频谱分析
FFT
Data handling
Signal analysis
Signal processing
Spectrum analysis.
