Issue No. 12 - December (1969 vol. 18)
W.K. Pratt , IEEE
a matrix factorization is presented for a Hadamard matrix of order twelve that permits a Hadamard transform of this order to be computed with substantially fewer operations than by simple matrix multiplication. The matrix factorization is extended to Hadamard matrices of order 2nX 12 where n is an integer.
Algorithm, data reduction, Hadamard matrix, Hadamard transform, matrix factorization.
W.K. Pratt, "An Algorithm for a Fast Hadamard Matrix Transform of Order Twelve", IEEE Transactions on Computers, vol. 18, no. , pp. 1131-1132, December 1969, doi:10.1109/T-C.1969.222597