Essential relations between classical and spectral approaches to analysis, synthesis, and testing of completely and incompletely specified Boolean functions

The links between spectral and classical methods used for the design of digital circuits are described. The real meaning of spectral coefficients from R and S Walsh spectra in classical logic terms is shown. The presented relations can be used for the calculation of Walsh-type transforms. The methods are based on direct manipulations on Karnaugh maps. The conversion starts from Karnaugh maps and results in the spectral coefficients.<>