Although the Fourier Transform is the traditional frequency domain analysis tool in communications systems, other transforms are pointed out in the context of orthogonal series representation of periodic signals. Last year, we became interested in the Walsh Transform and developed virtual instruments (VIs) to compute the Walsh transform, to generate the Walsh basis functions and modified LabVIE...

mental analysis1} and high resolution fast atom bombardment MS (HRFAB-MS)1* and 13C NMRspectral data (Table 1). All 18 carbon signals were seen in the 13G NMRspectrum, consisting of one methyl, 5 CH2, 2 methoxy, one oxymethine, 2 =CH and 7 sp2 quaternary carbons. These groups accounted 22 non-exchangeable protons and therefore 2A possesses 2 exchangeable protons. It reacted quickly with trimeth...