The main benefit of OFDM over single-carrier schemes is its ability to cope with severe channel conditions without complex equalization filters . It has improved the quality of long-distance communication by eliminating InterSymbol Interference (ISI) and improving Signal-to-Noise ratio (SNR).
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Simple Analog OFDM system Implementation Each subcarrier transmits one bit of information (N bits total) as indicated by its presence or absence in the output spectrum . The frequency of each subcarrier is selected to form an orthogonal signal set. These frequencies are also known at the receiver for signal recovery.
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