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An efficient mathematically correct scale free CORDIC
In order to approximate transandental functions, several algorithms were
proposed.Historically, polynomial interpolation, infinite series, and
other and based algorithms were studied for this purpose.The
CORDIC (COordinate Rotation DIgital Computer)introduced by Jack E. Volder in
1959, and generalized by J. S. Walther a few years later, is a hardware based
algorithmfor the approximation of trigonometric, hyperbolic andlogarithmic
functions.As a consequence, CORDIC is used for applications indiverse areas
such as signal and image processing.For these reasons, several modified
versions were proposed.In this article, we present anoverview of the CORDIC
algorithm for the computation of the circular functions, essentially the
scaling free version,and we will give a substential improvement to the commonly
used one