Rate adaptive digital subscriber line ("RADSL") modem
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United States of America Patent
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May 12, 1998
Grant Date -
N/A
app pub date -
Jul 19, 1996
filing date -
Jul 19, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
The invention provides a transceiver which is preferably used for high speed communications between a customer location and a central office over a subscriber line. The transceiver uses a pseudorandom noise generator both to provide a correlation for a complementary transceiver to use in achieving synchronization and as a way to transmit data in an extremely robust fashion. In addition, the transceiver uses frequency domain multiplexing so that downstream data and upstream data are transmitted by their respective transceivers in completely separate and distinct frequency bands. In order to achieve high data transfer rates, the transceivers can operate in an asymmetrical manner, whereby either (but, typically, the central office) transceiver can transmit data at a higher rate than the other transceiver.
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