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in an OFDM system having a radix two FFT (Say N=64) . all of these sub-carriers are not utilized. while some of the carriers are nulls to prevent leakage in to adjacent bands, say a four to five carriers will be pilots. and the remaining will be the data carriers. what is the significance of pilot carriers in OFDM system

regards, phani tej

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OFDM pilot symbols are used to measure channel conditions and/or obtain synchronization information.

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