Zhou Liuding. The Calculation of Two-Dimensional Convolutions by Polynomial Transforms and the W Transforms[J]. Acta Electronica Sinica, 1994, (2).DOI:
用多项式变换及W变换计算二维卷积
摘要
本文先给出了一种用W变换计算模(Z
N
+1)多项式积的新算法。然后将它与多项式变换结合用于计算N×N(N=2
t
)二维复值圆卷积。这种结合法完成上述卷积仅需2N2·(log_2N+3/2)次实乘及10·N
2
·log_2N+N
2
次实加.该乘法量仅为常规多项式变换法的一半。
Abstract
First
We demonstrate a new algorithm for polynomial product modulo(Z ̄N +1)implemented by the W transforms.Next
we combine this new algorithm with polynomial transforms to calculate N×N(N=2 ̄t)complex-valued convolutions.This combining approach only needs 2N ̄2·(log
2
N +3/2) real multiplication counts and 10N ̄2·log
2
N+10 real addition counts to calculate above convolutions.