计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (26): 54-55.

• 学术探讨 • 上一篇    下一篇

改进的基于FFT pruning 的窄带高分辨率频谱算法

王 琰,万 群,杨万麟   

  1. 电子科技大学 电子工程学院,成都 610054
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-09-11 发布日期:2007-09-11
  • 通讯作者: 王 琰

Improved high-resolution narrow-band spectra by FFT pruning

WANG Yan,WAN Qun,YANG Wan-lin   

  1. Dept. of Electronic Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-09-11 Published:2007-09-11
  • Contact: WANG Yan

摘要: 提出一种改进的基于FFT pruning的窄带高分辨率频谱计算方法。该方法是对Sreenivas’s FFT pruning 算法和 Nagai 的利用频移变换的FFT pruning 算法的推广。同时提出输出点分级思想,可实现任意窄带上非2的整数幂次频点输出。该算法比Sreenivas’s FFT pruning 算法具有更小的计算量和更简单的信号流图。

关键词: FFT pruning, 窄带, 频移

Abstract: An improved method of computing high-resolution narrow-band spectra is presented.This method is a generalization of Sreenivas’s FFT pruning algorithm and in combination with Nagai’s pruning with frequency shift.By dividing the output points into several series,non-power of two output points in arbitrary narrow band can be achieved.This improved algorithm has lower computational cost than Sreenivas’s algorithm and has a simpler flow-graph.

Key words: FFT pruning, frequency shift, narrow band