Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2007-04-18
2009-08-25
Jagannathan, Melanie (Department: 2419)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S328000, C370S335000, C370S342000, C375S260000
Reexamination Certificate
active
07580347
ABSTRACT:
Systems and methods for course and fine synchronization are provided. In one embodiment, a method comprises establishing communication between a first remote of a plurality of remote units and a host, the plurality of remote units coupled to the host in a multipoint-to-point configuration; transmitting up to a plurality of tones from the first remote, the tones modulated with upstream information using orthogonal frequency division multiplexing (OFDM); making a first adjustment in a manner in which transmissions are transmitted from the first remote on at least one of the tones, the first adjustment varying the alignment of the transmissions received at the host; and making a second adjustment in the manner in which transmissions are transmitted from the first remote on the at least one of the tones, the second adjustment varying the alignment of the transmissions received at the host, wherein the second adjustment is finer the first adjustment.
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Engstrom et al., “A System for Test of Multiaccess Methods Based on OFDM”, “Confe
Brede Jeffrey
Geile Michael J.
ADC Telecommunications Inc.
Fogg & Powers LLC
Jagannathan Melanie
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