What I'll get if I take FFT of a frequency domain data.
I have two questions related to this.
For ex, x is a time domain data where X = fft(x), now fft(X)= what i'll get ?
While reading SCFDMA, data is first DFT'd and a subcarrier mapping happens then we are taking an IFFT which will transmitted using a radio. According to my knowledge the input to radio is a time domain data.But in SCFDMA taking DDT itself converts my time domain data to Frequency domain then again if i take IFFT the frequency domain data converted back to time domain which is fed to radio. How this works ?