Interpolation and Signal Scrambling

I explore different methods to achieve interpolation, scrambling, and descrambling of an input signal. Most importantly, I see that these signal processing concepts can be realized in different domains. For interpolation, I show that the ”smoothing” effect can be applied in either the time domain or the frequency domain by applying the zero padding technique to the sampled signal or to the sampled signal’s DFT, respectively. Moreover, I show two processes to scramble and descramble a signal–one for an analog input and another for a digital input.