摘要
本文介绍了三种DFT算法:常系数乘法递归方式DFT算法,正向移动DFT算法、反向移动DFT算法,并进行了公式推导,导出了适于计算机运算的非常简便的递推公式,,同时对这三种DFT算法进行了比较和讨论,它们都可在频谱分析、功率谱估计,调制、解调和滤波中得到广泛应用,特别是两种移动DFT算法,它们的作用如同一个匹配滤波器,具有搜索、跟踪的能力,可在多路时间备择接收机中完成正交付载波分离和波特同步的双重功能。
This paper presents three types of DFT algorithms: the constantcofficient multiplication recursive DFT algorithms, the forward moving DFTalgorithms and the backward moving DFT algorithms.We have derived some verysimple and convenient recursive formulas suitable for computer operation.Thethree kinds of DFT algorithms can be widely used for spectrum analysis, powerspectrum estimation, modulation demodulation and filtering. In particular thetwo kinds of moving DFT algorithms can act as a matched filter which hascapabilities of searching and tracking and the dual function of both orthogonalcarrier division and baud synchronization in a multiple time alternative receiver,
出处
《信号处理》
CSCD
北大核心
1989年第4期240-249,共10页
Journal of Signal Processing
