Open Access

P-CORDIC: A Precomputation Based Rotation CORDIC Algorithm

EURASIP Journal on Advances in Signal Processing20022002:137251

DOI: 10.1155/S1110865702205028

Received: 30 August 2001

Published: 1 September 2002

Abstract

This paper presents a CORDIC (coordinate rotation digital computer) algorithm and architecture for the rotation mode in which the directions of all micro-rotations are precomputed while maintaining a constant scale factor. Thus, an examination of the sign of the angle after each iteration is no longer required. The algorithm is capable to perform the CORDIC computation for an operand word-length of 54 bits. Additionally, there is a higher degree of freedom in choosing the pipeline cutsets due to the novel feature of independence of the iterations https://static-content.springer.com/image/art%3A10.1155%2FS1110865702205028/MediaObjects/13634_2001_Article_792_IEq1_HTML.gif and https://static-content.springer.com/image/art%3A10.1155%2FS1110865702205028/MediaObjects/13634_2001_Article_792_IEq2_HTML.gif in the CORDIC rotation.

Keywords

CORDIC computer arithmetic constant scale factor precomputation rotation mode

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