In this Experiment we implemented 4 points and 8 point DFT and IDFT.DFT is used to covert Time domain signal to the frequency domain. we convert the time domain signal to the frequency domain because frequency domain has the following advantages over time domain:
1. Frequency domain analysis is very useful in creating desired wave patterns such as binary bit patterns of a computer.
2. Frequency domain analysis is used in conditions where processes such as filtering, amplifying and mixing are required.
Also we learnt that zero padding reduces the frequency gap of the spectrum as a result of which the accuracy of the magnitude spectrum increases due to decrease in error in representation. It also increases the resolution and quality of the spectrum
For Implementation in c follow this linkhttps://drive.google.com/open?id=0BxR8_fiX2NsmWl9MenZoZmxSejg
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