Multiplex communications – Communication over free space – Repeater
Patent
1996-05-20
1998-12-22
Jung, Min
Multiplex communications
Communication over free space
Repeater
370503, 375222, 375356, H04J 306
Patent
active
058526048
ABSTRACT:
A power-conserving time division multiple access (TDMA) radio telephone system is disclosed in which a cluster of subscriber stations, remote from a base station, employs a common pool of frequency-agile modems each of which digitally synthesizes, on a timeSlot-by-timeSlot basis, the different channel-identifying intermediate frequencies needed to support communications between several of the subscriber stations and the base station. Power conservation is facilitated inter alia by controlling the assignment of modems to calls, maintaining unassigned modems in a powered-down state and by controlling the number of calls using the same time slot. Delay in assigning a powered-down modem to a call is eliminated by making available to all modems the highest quality synchronization information obtained by any of the active modems.
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Cooley David M.
DiGiovanni Joseph J.
Johns Eric
Kaewell John D.
Kurtz Scott D.
InterDigital Technology Corporation
Jung Min
LandOfFree
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