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Orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. OFDM has developed into a popular scheme for wideband] digital communication, whether wireless or over copper wires, used in applications such as digital television and audio broadcasting, DSL, broadband internet access, wireless networks, and 4G mobile communications.
The primary advantage of OFDM over single-carrier schemes is its ability to cope with severe channel conditions (for example, attenuation of high frequencies in a long copper wire, narrowband interference and frequency-selective fading (due to multipath) without complex equalization filters.
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