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...Journal of applied mathematics and physics http www scirp org jamp issn online print discrete time frequency signal analysis processing techniques for non stationary signals s sivakumar d nedumaran p g research department electronics government arts college paramakudi tamilnadu india central instrumentation service laboratory university madras guindy campus chennai how to cite this paper abstract presents the methodology properties which are frequently phys used in biomedical communication image fields two classes ics chosen study one is https doi short fourier transform stft technique from linear received june other wigner ville distribution wvd qua accepted september dratic algorithms both these tech published niques developed implemented on spec trum results revealed that its copyright by authors scientific publishing inc most suitable work licensed under creative commons attribution international keywords license cc creativecommons licenses term open access algorithm introduction n...