Systems and method for orthogonal frequency divisional multiplexing

US8351321B2 · kind B2 · utility

Assignee

• HTC Corporation · TW

Inventors

• Mark J. Dapper · Cincinnati, US
• Michael J. Geile · Loveland, US
• Terrance J. Hill · Sharonville, US
• Harold A. Roberts · Eden Prairie, US
• Brian D. Anderson · Plymouth, US
• Jeffrey Brede · Eden Prairie, US
• Mark S. Wadman · Plymouth, US
• Robert J. Kirscht · Savage, US
• James J. Herrmann · Eagan, US
• Michael J. Fort · Eagan, US
• Steven P. Buska · Minnetonka, US
• Jeff Solum · Bloomington, US
• Debra Lea Enfield · Chaska, US
• Darrell Berg · Bloomington, US
• Thomas Smigelski · Lake Zurich, US
• Thomas C. Tucker · Chapel Hill, US
• Joe Hall · Winfield, US
• John M. Logajan · Arden Hills, US
• Somvay Boualouang · Bloomington, US
• Heng Lou · Bloomington, US
• Mark Elpers · Elk River, US
• Matt Downs · Bloomington, US
• Tammy Ferris · Bloomington, US
• Adam Opoczynski · Plano, US
• David S. Russell · Minneapolis, US
• Calvin G. Nelson · Shorewood, US
• Niranjan R. Samant · Lansdale, US
• Joseph F Chiapetta · Trumbull, US
• Scott Sarnikowski · Plymouth, US

Key dates

• Filing date: Oct 29, 2007
• Grant date: Jan 8, 2013
• Expiry date: Jun 27, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02D30/50
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a multi-carrier modem comprises: a receiver configured to de-modulate symbols from at least one of a plurality of spectrally overlapping carrier signals to produce a receiver output; 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 coupled to the receiver, wherein the processor applies a Fourier transform to the receiver output; and a controller programmed to instruct the transmitter to transmit at least one symbol representing a request for bandwidth allocation on a first carrier; wherein the controller is further programmed to determine when a collision has occurred on the first carrier.