Don Coppersmith, Nick Howgrave-Graham, et al.
Journal of Discrete Algorithms
Paper
Hadamard Transforms on Multiply/Add Architectures
Abstract
A new algorithm for computing Hadamard transforms is presented. If n is a power of four, then the new algorithm uses ⅞ n logn multiply/adds to compute a Hadamard transform of length n. © 1994 IEEE
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