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Orthogonal Frequency Division Modulation (OFDM)
Importance of Orthogonality • Why not just use FDM (frequency division multiplexing) ! Not orthogonal • Need guard bands between adjacent frequency bands ! extra overhead and lower throughput f Individual)sub%channel) Leakage)interference)from) adjacentsub%channels) f guard)band) Guard)bands)protect leakage)interference)
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