Multiplex communications – Duplex – Communication over free space
Patent
1996-07-19
1998-05-12
Patel, Ajit
Multiplex communications
Duplex
Communication over free space
375222, H04J 100
Patent
active
057517010
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.
REFERENCES:
patent: 4756007 (1988-07-01), Qureshi et al.
patent: 4802189 (1989-01-01), Wedler
patent: 5023869 (1991-06-01), Grover et al.
patent: 5394392 (1995-02-01), Scott
patent: 5450438 (1995-09-01), Landry et al.
patent: 5541955 (1996-07-01), Jacobsmeyer
Langberg Ehud
Scholtz William Henry
Globespan Technologies, Inc.
Patel Ajit
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