| US 7,596,186 B2 | ||
| Devices and methods of modulation and demodulation enabling the extension or replacement of a communications link, corresponding sender and receiver | ||
| Philippe Le Bars, Thorigne-Fouillard (France) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Aug. 16, 2005, as Appl. No. 11/204,031. | ||
| Claims priority of application No. 04 09855 (FR), filed on Sep. 16, 2004. | ||
| Prior Publication US 2006/0056278 A1, Mar. 16, 2006 | ||
| Int. Cl. H04L 27/00 (2006.01) | ||
| U.S. Cl. 375—298 [370/226; 370/243; 370/274; 370/315; 370/492; 398/18; 398/64; 455/7; 455/13.1; 455/14; 455/16; 342/353] | 11 Claims |
| 1. A device for quadrature modulation of a carrier frequency, said device comprising:
receiving means for receiving a first signal from a first wire of a wired communication link, and for receiving a second signal
from a second wire of a wired communication link;
insertion means for inserting a discrimination sequence in at least one of said first and second received signals, the discrimination
sequence being specific to the signal in which said discrimination sequence is inserted so as to obtain first and second differentiated
signals;
modulating means for modulating the carrier frequency comprising first assigning means for assigning the first differentiated
signal to one of an in-phase channel and a quadrature channel, and assigning the second differentiated signal to the other
of the two channels; and
wireless sending means for sending the modulated carrier frequency.
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