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This Topic starts this Chapter on the theoretical glue that is needed to fully understand Nyquist sampling theory, that follows in the next Chapter. Sampling theory requires the understanding of…

This Topic provides a derivation of the Complex Fourier series, given the Trigonometric Fourier series and the concept of complex phasors. This further topic is there for students interested in…

This topic uses linear system theory to motivate looking at methods for signal decompositions. It starts by observing that linear systems can be described by ordinary differential equations…