I have a couple of questions regarding the representation of a signal in the frequency domain I wish someone could help me with..(adsbygoogle = window.adsbygoogle || []).push({});

1-why is it when we represent a non-periodic signal in the frequency domain it is continuous while the frequency domain of a periodic signal is discrete ?

2-what does it mean when we transfer a signal into the frequency domain

(say a rect wave what does it mean that the representation of it in the frequency domain is sinc, I know that it represents the different frequencies in the signal but why does it decay ?).

3-When plotting the signal in the freq. domain and the x-axis is the freq. in Hz what does the y-axis represent ?

thanks....

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# Frequency Domain

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