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This section introduces sampling. Sampling is the necessary fundament for all digital signal processing and communication. Sampling can be defined as theprocess of measuring an analog signal at distinct points.
Digital representation of analog signals offers advantages in terms of
Claude Shannon has been called the father of information theory, mainly due to his landmark papers on the "Mathematical theory of communication" . Harry Nyquist was the first to state the sampling theorem in 1928, but it was not proven until Shannon proved it 21 years later in the paper "Communications in the presence of noise" .
In this chapter we will be using the following notation
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