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Results tagged with ifft
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user 34272
1
vote
4
answers
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OFDM - why do we need IFFT?
This question is really related to - is there any need for IFFT in the first place? … Can I ask ----- is the IFFT block really necessary? …
- 139
0
votes
OFDM - why do we need IFFT?
This answer to my question is for raising an important point about this IFFT method of generating OFDM. … There is a catch, which is - each transmitted IFFT sequence or block of complex numbers, is not periodic. So one cannot expect a physical 'OFDM' spectrum from this 'IFFT' method. …
- 139
0
votes
Ambiguity in the IFFT process in OFDM
IFFT or IDFT generation of physical OFDM is a bit of a contradiction in itself, because you would need to transmit each IFFT output block sequence periodically (continually, repetitively) in order to even … If not transmitted periodically, then the IFFT signal is not really OFDM at all, but would just be quadrature modulation. Regular quadrature signal. …
- 139