I was working on my thesis when this question popped into my head, why can't there be overlap in FDM wihout ICI but you are allowed to overlap in OFDM without ICI?(adsbygoogle = window.adsbygoogle || []).push({});

Also why is the maximum overlap of subchannels 50% in OFDM before ICI occurs?

From math point of view as long as the carriers are orthogonal and you take the integral from 0 to T it always reduces to a delta function so it doesn't seem to matter how much bandwidth is on each side of the center frequency.

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# FDM vs OFDM

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