Chapter 3. Multicarrier Modulation
Multicarrier modulation underlies many of the most successful modern wireless data systems, including Digital Subscriber Lines (DSL), Wireless LANs (802.11a/g/n), Digital Video Broadcasting, and most recently, beyond 3G cellular technologies such as WiMAX and LTE. The unifying common feature of multicarrier modulation techniques is the use of multiple parallel subcarriers, invariably generated by the (inverse) discrete Fourier transform. By far the most common type of multicarrier modulation is Orthogonal Frequency Division Multiplexing (OFDM), along with its close cousins Discrete Multitone (DMT) in DSL1 and the somewhat oddly named Single-Carrier Frequency Division Multiple Access (SC-FDMA) in the LTE uplink. ...
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