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High speed recursion-free CORDIC architecture

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4 Author(s)
Abdulla, S.S. ; Dept. of Electr. & Comput. Eng., Univ. of Texas, Austin, TX, USA ; Haewoon Nam ; Swartzlander, E.E. ; Abraham, J.A.

This paper proposes a novel unrolled CORDIC (Co-Ordinate Rotation DIgital Computer) architecture based on parallel operations of a series of micro-rotation stages in the conventional CORDIC. To improve the speed and lower the energy consumption, a Wallace tree reduction is used for the summation of the computed parallel terms. For a large number of micro-rotation stages, a first order approximation is used to reduce the complexity while maintaining the output data accuracy. The circuit has been implemented using a 65 nm process. The results show a speed improvement of 20% and an energy-delay reduction of 27% with a minimal expense of 5% increase in the circuit area relative to a conventional CORDIC architecture.

Published in:

SOC Conference (SOCC), 2010 IEEE International

Date of Conference:

27-29 Sept. 2010

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