Pulse or digital communications – Systems using alternating or pulsating current – Antinoise or distortion
Patent
1997-11-14
2000-05-30
Chin, Stephen
Pulse or digital communications
Systems using alternating or pulsating current
Antinoise or distortion
375222, 370204, 370487, 370490, H04B 1500
Patent
active
060699221
ABSTRACT:
To accommodate the overlay of broadband information over narrowband bearers while reducing cross-talk in upstream and downstream directions, different baseband line codes are used to modulate respective upstream and downstream transmissions on a common wireline communication resource, such as a twisted copper-pair. In this way, filtering components located at each end of a connection can reject cross-talk based upon dissimilar signal characteristics that arise between wanted broadband signals having a first baseband line code and spectrally-shifted cross-talk emanating from interfering broadband signals having a different baseband line code.
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Chin Stephen
Jiang Lenny
Nortel Networks Corporation
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