A Nonrecursive Equation for the Fourier Transform of a Walsh Function
Karl H. Siemens, Reuven Kitai · IEEE Transactions on Electromagnetic Compatibility · 1973
Convolution of a discrete Walsh function with a rectangular pulse simplifies the derivation of an expression for the Fourier transform of a Walsh function. The nonrecursive transform equation that is developed is a function of the bits of the Gray code number for the order of the Walsh function.