Ma Weizheng & Yang Dekun. A New Algorithm for DFT (pn;k) Using Local Ring Structure[J]. Acta Electronica Sinica, 1992, (7): 72-79.DOI:
用局部环构造DFT(pn;k)新算法
摘要
本文介绍用局部环结构构造DFT(p
n
;k)算法
算法首先利用一种新局部环的划分方法将DFT(p
n
;k)变换矩阵排成具有循环矩阵块的块结构矩阵;其次将各循环矩阵块分解成一系列DFT(p
s
)核CFT(p
s
)
s=1
2
……
n.文中给出了本算法的乘法复杂性
并论证了当n=1
k≠1或n≠1
k=1时本算法和具有理论上最小乘法次数的算法相同。
Abstract
This paper introduces the construction of algorithm for computing DFT(pn;k). The construction of algorithm contains two steps: first
to permute the transform matrix of DFT(pn; k) into a block-structured matrix which contains circulant matrices by use of the partition of local ring; second
to decompose the circulant matrices into a series of CFT(p3)
the core of DFT(p3)
s = 1
2
…… n. We also give the multiplicative complexity of the algorithm and prove that the algorithm is one with the minimum number of multiplications when n=1