Ofdm-Orthogonal frequency-division multiplexing

May 5th, 2015
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Orthogonal frequency-division multiplexing (OFDM), essentially identical to coded OFDM (COFDM) and discrete multi-tone modulation(DMT), is a frequency-division multiplexing (FDM) scheme used as a digital multi-carrier modulation method. A large number of closely-spacedorthogonal sub-carriers are used to carry data. The data is divided into several parallel data streams or channels, one for each sub-carrier.

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OfdmOrthogonal frequency-division multiplexing(OFDM), essentially identical tocoded OFDM(COFDM) anddiscrete multi-tone modulation(DMT), is afrequency-division multiplexing(FDM) scheme used as a digital multi-carriermodulationmethod. A large number of closely-spacedorthogonalsub-carriersare used to carrydata. The data is divided into several parallel data streams or channels, one for each sub-carrier. Each sub-carrier is modulated with a conventional modulation scheme (such asquadrature amplitude modulationorphase-shift keying) at a lowsymbol rate, maintaining

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