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no of subcarriers in OFDM

Started by jahn...@yahoo.co.in December 22, 2006
I am doing a project related to OFDM. My doubt is whether the no of subcarriers and the IFFT size should be equal or not?
No, the number of subcarriers and FFT size can be different as long a subcarriers are less than the FFT size. Usually the channel dictates how you populate the bins; for eg: in a high doppler channel the data subcarriers are usually interlaced with "OFF" subcarriers. hope this helps

j...@yahoo.co.in wrote: I am doing a project related to OFDM. My doubt is whether the no of subcarriers and the IFFT size should be equal or not?

Amit Pathania