Abstract:

To expand the convergence domain of logarithmic function,classic CORDIC algorithm adds some special iterations in hyperbolic coordinate system in vector mode.This algorithm is simple,but it requires more hardware resources.This article proposes an improved algorithm to address this problem.Our algorithm utilizes the distance relationship between central domain and the other domains to make transformation and then calculate.The results of hardware implementation show that the improved algorithm has obvious advantages in hardware resource and working frequency.

Key words: CORDIC algorithm;logarithmic function;central domain;hardware implementation