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OFDM fade and guard interval

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fran1942

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Hello, regarding the issue of signal fade using OFDM modulation.

I understand how Guard interval helps with interference from following or preceeding symbols but spacing out the sampling so no interference occurs but I don't understand how Guard interval helps prevent the fade of a particular symbol.

If someone could please elaborate that would be great.
 

There is slow fading (e.g. due to loss) and fast fading (e.g. due to interference). OFDM is capable of mitigating the effects of fast fading, since the fast fading effects will typically affect only small portions of a (lengthy) OFDM symbol.
 

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