The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2011
Filed:
Oct. 29, 2007
Michael J. Geile, Loveland, OH (US);
Harold A. Roberts, Eden Prairie, MN (US);
Brian D. Anderson, Plymouth, MN (US);
Jeffrey Brede, Eden Prairie, MN (US);
Michael J. Fort, Eagan, MN (US);
Tammy Ferris, Bloomington, MN (US);
Michael J. Geile, Loveland, OH (US);
Harold A. Roberts, Eden Prairie, MN (US);
Brian D. Anderson, Plymouth, MN (US);
Jeffrey Brede, Eden Prairie, MN (US);
Michael J. Fort, Eagan, MN (US);
Tammy Ferris, Bloomington, MN (US);
HTC Corporation, Taoyuan, TW;
Abstract
Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a multi-carrier modem comprises: a receiver configured to receive a waveform comprising spectrally overlapping carrier signals from at least two of a plurality of remotes, wherein the spectrally overlapping carrier signals are modulated using an inverse Fourier transform algorithm; a transmitter; a processor coupled to the transmitter, wherein the processor outputs data for transmission by the transmitter, wherein the processor applies an inverse Fourier transform algorithm to the data provided to the transmitter; a controller programmed to calculate an elapsed time for each of the two remotes, the elapsed time representing a time between transmitting a ranging signal to a remote and receiving a signal from the remote in response to the ranging signal; the controller further programmed to reducing any difference between at least two elapsed times by instructing at least one of the plurality of remotes to adjust a delay.