Issue No.11 - November (1976 vol.25)
B.J. Fino , Systems Applications, Inc.
A unified matrix treatment is presented for the various orderings of the Walsh-Hadamard (WH) functions using a general framework. This approach clarifies the different definitions of the WH matrix, the various fast algorithms and the reorderings of the WH functions.
Fast Walsh-Hadamard transform (WHT), Hadamard matrices, Kronecker product of matrices, recursive matrix factorization, sequency reordering, unitary matrices, Walsh functions.
B.J. Fino, V.R. Algazi, "Unified Matrix Treatment of the Fast Walsh-Hadamard Transform", IEEE Transactions on Computers, vol.25, no. 11, pp. 1142-1146, November 1976, doi:10.1109/TC.1976.1674569