Orthogonal frequency-division multiplexing: Difference between revisions

Revision as of 21:18, 31 March 2006

Revision as of 19:20, 1 April 2006

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=== Benefits ===

The benefits of using OFDM are many, including high spectrum efficiency, resistance against multipath interference (particularly in wireless communications), and ease of filtering out [[noise (physics)|noise]] (if a particular range of frequencies suffers from interference, the carriers within that range can be disabled or made to run slower). Also, the upstream and downstream speeds can be varied by allocating either more or fewer carriers for each purpose. Some forms of [[Rate Adaptive-adaptive DSL]] use this feature in real time, so that bandwidth is allocated to whichever stream needs it most.

An extremely important benefit from using multiple sub-carriers is that because