Filtering white noise to obtain any desired power spectral density can be expedited by starting with a maximal length sequence: its binary nature eliminates multiplications from the convulotion operation, and the number of additions can be reduced to the order of 2.5n log(2)n, where n is the length of the sequence, using an algorithm based upon the fast Hadamard transform.

Author: Borish, Jeffrey
Affiliation: Lucasfilm Ltd., San Rafael, CA
JAES Volume 33 Issue 3 pp. 141-144; March 1985
Publication Date: March 1, 1985

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