Devices and methods of modulation and demodulation enabling the extension or replacement of a communications link, corresponding sender and receiver
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United States of America Patent
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Sep 29, 2009
Grant Date -
Mar 16, 2006
app pub date -
Aug 16, 2005
filing date -
Sep 16, 2004
priority date (Note) -
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Abstract
A modulation device comprises for each carrier frequency: means of discrimination between a signal coming from a first channel of a communications link and a signal coming from a second channel of said link, so as to obtain differentiated first and second signals; first assigning means, enabling the assigning of the first differentiated signal to one of the two modulation arms, and the second differentiated signal to the other of the two modulation arms. Furthermore, a corresponding demodulation device comprises, for each modulated carrier frequency: means for the determining, among the two signals received by the two demodulation arms, of the signal corresponding to a first differentiated signal and the signal corresponding to a second differentiated signal, as a function of a discrimination made at sending; second assigning means, enabling the received signal corresponding to the first differentiated signal to be assigned to a first channel of a communications link, and the received signal corresponding to the second differentiated signal to be assigned to a second channel of said link.
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