Multiplex communications – Generalized orthogonal or special mathematical techniques – Particular set of orthogonal functions
Reexamination Certificate
2007-10-26
2009-06-16
Jagannathan, Melanie (Department: 2419)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Particular set of orthogonal functions
C370S328000, C370S335000, C370S342000, C375S260000, C455S437000
Reexamination Certificate
active
07548508
ABSTRACT:
Systems and methods for round-trip-delay adjustment in a multipoint-to-point orthogonal frequency division multiplexing () system are provided. In one embodiment, a method for a remote unit to request bandwidth in an Orthogonal Frequency Division Multiplexing () multi-point to point system comprises: transmitting a signal from a remote unit having a request for bandwidth to a host unit on a first tone, the signal from the remote unit configured to combine with a signal from at least one other remote unit on a different tone to form a coherent waveform; determining when a collision has occurred on the first tone between the signal transmitted by the remote unit and a signal from at least one other remote unit; and when a collision occurs, re-transmitting the request for bandwidth on the first tone.
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Geile Michael J.
Roberts Harold A.
ADC Telecommunications Inc.
Fogg & Powers LLC
Jagannathan Melanie
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