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(@ziwukim)


Yes, full information can be recovered after FFT. A problem I have is estimating CFO (which requires complex data for accurate CFO estimation) before performing...
Thanks Slartibartfast! Yes - That's what I thought. 
Thanks for the reply, Detlef! I forgot to use the pilot tones and your suggestions are helpful. Thanks!
In the IEEE 1902.2 narrow-band OFDM PLC standard, the IFFT is performed but only the real parts are taken for the transmission while discarding the imaginary parts...

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