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The CORDIC algorithm: new results for fast VLSI implementation

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2 Author(s)
Duprat, J. ; Lab. LIP-IMAG, CNRS, Lyon, France ; Muller, J.-M.

After a brief survey of the CORDIC algorithm, some new results that allow fast and easy signed-digit implementation of CORDIC, without modifying the basic iteration step are given. A slight modification would make it possible to use a carry-save representation of numbers, instead of a signed-digit one. The method, called the branching CORDIC method, consists of performing in parallel two classic CORDIC rotations. It gives a constant normalization factor. An online implementation of the algorithm is proposed with an online delay equal to 5 for the sine and cosine functions

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Computers, IEEE Transactions on  (Volume:42 ,  Issue: 2 )