Patent Number: 8,576,693

Title: Systems and method for orthogonal frequency division multiplexing

Abstract: Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a multi-carrier modem comprises: a transmitter configured to modulate symbols onto at least one of a plurality of the spectrally overlapping carrier signals; a processor coupled to the transmitter, wherein the processor outputs data for transmission by the transmitter, wherein the processor applies an inverse Fourier transform to the data transmitted by the transmitter; the processor modulating a first carrier of the plurality of spectrally overlapping carrier signals based on a first modulation scheme while modulating a second carrier of the plurality of spectrally overlapping carrier signals based on a second modulation scheme.

Inventors: Dapper; Mark J. (Cincinnati, OH), Geile; Michael J. (Batavia, OH), Hill; Terrance J. (Fairfield, OH), Roberts; Harold A. (Eden Prairie, MN), Anderson; Brian D. (Plymouth, MN), Brede; Jeffrey (Savage, MN), Wadman; Mark S. (Plano, TX), Kirscht; Robert J. (Savage, MN), Herrmann; James J. (Eagan, MN), Fort; Michael J. (Pelham, NH), Buska; Steven P. (Minnetonka, MN), Solum; Jeff (Bloomington, MN), Enfield; Debra Lee (Chaska, MN), Berg; Darrell (Bloomington, MN), Smigelski; Thomas (Lake Zurich, IL), Tucker; Thomas C. (Chapel Hill, NC), Hall; Joe (Bloomington, MI), Logajan; John M. (Arden Hills, MN), Boualouang; Somvay (Bloomington, MN), Lou; Heng (Bloomington, MN), Elpers; Mark D. (Elk River, MN), Downs; Matt (Bloomington, MN), Ferris; Tammy (Bloomington, MN), Opoczynski; Adam (Plano, TX), Russell; David S. (Minneapolis, MN), Nelson; Calvin G. (Shorewood, MN), Samant; Niranjan R. (Middletown, CT), Chiappetta; Joseph F. (Trumbull, CT), Sarnikowski; Scott (Plymouth, MN)

Assignee: HTC Corporation

International Classification: H04J 11/00 (20060101)

Expiration Date: 1/05/12017