Fully meshed CDMA network for personal communications terminals
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United States of America Patent
Stats
-
Jan 2, 1996
Issued Date -
N/A
app pub date -
Oct 26, 1993
filing date -
May 29, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A network of personal communications terminals communicating in a CDMA mode includes a reference station for transmitting a pilot tone that is pre-corrected at the reference station and is used at the remaining stations for frequency control, transmit power control and antenna acquisition and tracking. Voice activation is employed to permit the CDMA system to share the satellite transponder power and bandwidth in a fully Demand-Assignment-Multiple-Accessing (DAMA) manner. Burst-mode operation of a voice activated CDMA system is permitted by sending dummy data in the speech pausing period at a reduced (but not zero) power level, and the 'near-far' problem inherent in a CDMA system is mitigated by the use of uplink power control.
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