Radio telephone system for minimizing co-channel interference utilizing geographic separation of signals and transmission power control
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United States of America Patent
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-
Nov 17, 1998
Grant Date -
N/A
app pub date -
Jul 2, 1996
filing date -
Dec 16, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for minimizing co-channel interference between transmission sectors at their common periphery. The system exploits the geographic separation of potentially interfering mobile transmitters and utilizes transmission power control. The system employs sectored antennas in a combined frequency hopping, TDMA system wherein each subscriber in a particular sector is assigned a time slot in the system based upon that subscriber's geographic location within that sector. The transmission power in the sector is reduced during certain predetermined time slots and subscribers who are remote from the fringe of the sector are assigned to these power reduced time slots. During up-link the transmission power for subscribers located proximal to the fringe are reduced to cause less co-channel interference between their signals and the signals from other subscribers in different sectors having the same time slot.
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