Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via frequency channels
Reexamination Certificate
2006-10-10
2006-10-10
Phan, Man U. (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via frequency channels
C370S328000, C370S441000
Reexamination Certificate
active
07120166
ABSTRACT:
A communication system such as an OFDM or DMT system has nodes which are allowed to transmit continuously on one or just a few of the system's frequency sub-channels, while the other nodes avoid putting any signal into those sub-channels. Simple low data rate nodes are allowed to use a small number of sub-channels while more complicated nodes use the remainder, and preferably functionality is provided to ensure that adjacent sub-channels are reliably spaced apart in frequency so that they do not bleed over into one another; to ensure that signals from all nodes arrive at the base station with well-aligned symbol transitions; and to ensure that signals from the various nodes arrive at the base station with similar power levels.
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McFarland William
Meng Teresa H.
Atheros Communications Inc.
Phan Man U.
Rosenberg , Klein & Lee
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