In many practical applications of Digital Signal Processing (DSP), one is faced with the problem of changing the sampling rate of a signal, either increasing it or decreasing it by some amount. Software-defined radios and test equipment use a variety of digital signal processing techniques toimprove system performance. Interpolation is one technique that can be used to increase the sample rate of digital signals. In this work, we illustrated interpolation in the time domain by writing appropriate codes using MatlabÒ. Several plots generated by running these programs were presented. Analysis of the plots showed that the output signals were exact replicas of the inputsignals.
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