Satellite diversity scheme

Details Satellite diversity scheme Satellite diversity scheme

1995-12-18

1997-08-26

Safourek, Benedict V.

Multiplex communications

Communication over free space

Repeater

370331, H04B 7195

Patent

active

056617240

ABSTRACT:
A diversity scheme for allowing a transmitter/receiver, such as a mobile unit in a mobile telecommunications system, to exchange communication signals with more than one control station, such as a base station or satellite. According to an exemplary embodiment of the diversity scheme, the mobile unit scans for the control channel of a second satellite during idle time slots while communicating with a first satellite during active time slots. Once the mobile unit detects a control channel from a second satellite, the mobile unit stores synchronization information and establishes a communication link with the second satellite if shadowing or other severe fading causes signal quality over a communication link established with a first satellite to fall below a threshold level. The diversity scheme also allows the mobile unit to communicate simultaneously with two satellites, using alternate TDMA frames.

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patent: 5228029 (1993-07-01), Kotzin
patent: 5408684 (1995-04-01), Yunoki et al.
patent: 5479410 (1995-12-01), Paavonen
patent: 5483668 (1996-01-01), Malkamaki et al.
patent: 5524009 (1996-06-01), Tuutijarvi et al.
patent: 5559806 (1996-09-01), Kurby et al.

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