| 摘要 |
2088052 9200636 PCTABS00010 A mobile communications system uses a communications satellite (130) and a Mobile Telephone Switching Office (MTSO) (150) and communicates with mobile units (101, 102) via the satellite (130). A cell site (140) has a co-located cell site converter (145) which converts satellite signals to signals for the MTSO and vice-versa. Remote converter sites (110-113) communicate with the satellite (130) and with the mobile units (101, 102) in given geographical areas. A single satellite link is sufficient for adequate RSA service. Frequency and phase differences among signals from the remote sites (110-113) to the satellite (130) are synchronized to avoid frequency -and phase- drift.
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