Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2001-06-18
2008-07-22
Payne, David C. (Department: 2611)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S395620, C375S130000, C375S145000, C455S343400
Reexamination Certificate
active
07403507
ABSTRACT:
A sleep control system and method are provided that permit a reference clock and the direct sequence spread spectrum (DSSS) modem in a mobile station receiver to be turned off and turned back on at arbitrary points in time while still maintaining accurate base station system time. Accurate timing is made possible through a number of techniques including precise initial calibration using a rising edge/falling edge averaging system, determining the sleep clock and reference clock frequencies, and the determination of the frequency drift of the sleep clock that occurred during the previous sleep interval.
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Chen Chunhao
Hui Yan
Liu Juncheng C.
McDonough John G.
Brady, III Wade J
Dsouza Adolf
Payne David C.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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