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© 2021 Sadasivan Puthusserypady
In practical applications of signals and systems, we often need to measure signals and analyze them to discover the characteristics of the signals and/or systems present in the particular application under consideration. For example, in the receiver of a communication system, we would depend a lot on the received signal to understand the nature of the channel through which the signal propagation takes place. Another example would be the non-invasively collected ECG signals from the chest sensors/electrodes of a subject/patient to process and diagnose the condition of the heart.