Htc Corporation

Joseph F Chiapetta

Michael Joseph Geile

Harold Ashton Roberts

Jeffrey Brede

Mark J Dapper

Michael J Fort

Brian D Anderson

Terrance J Hill

Mark S Wadman

James J Herrmann

David S Russell

Jeff Solum

Mark D Elpers

Thomas Smigelski

Robert J Kirscht

Adam Opoczynski

Heng Lou

Calvin G Nelson

Tammy Ferris

Steven P Buska

Niranjan R Samant

Scott Sarnikowski

Joe Hall

Matt Downs

Darrell Berg

Thomas C Tucker

John M Logajan

Somvay Boualouang

Debra Lea Enfield

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.

Systems and method for orthogonal frequency divisional multiplexing

Growing community of inventors

Trumbull, CT, United States of America

Joseph F Chiapetta