Frequency hopped return link with net entry channel for a satell

Details Frequency hopped return link with net entry channel for a satell Frequency hopped return link with net entry channel for a satell

1995-02-08

1997-06-10

Olms, Douglas W.

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

370350, 375201, 375202, H04J 1306

Patent

active

056383614

ABSTRACT:
A satellite network communication system in which a plurality of subscriber handset terminals communicate with a ground hub station on traffic frequency channels using spread spectrum orthogonal CDMA transmissions. The hub station includes a control generator for generating a net entry control channel for communicating synchronization correction signals (timing, frequency and power) to subscriber handset terminals and a return link receiver. Each subscriber handset terminal has a subscriber unit control channel receiver for receiving the control channel synchronization correction signals and a subscriber unit return link transmitter connected to receive the synchronization correction signals so that signals from all subscriber handset terminals arrive at the hub station in time, power and frequency synchronism. The subscriber unit return link transmitter includes frequency hopped spread spectrum carrier such that none of the signals occupies the same frequency bin at the same time. The net entry control channel transmits small time and frequency correction signals to each of the plurality of subscriber handset terminals.

REFERENCES:
patent: 5193102 (1993-03-01), Meidan et al.
patent: 5245612 (1993-09-01), Kachi et al.
patent: 5245634 (1993-09-01), Averbuch
patent: 5363110 (1994-11-01), Inamiya
patent: 5392450 (1995-02-01), Nossen
patent: 5463659 (1995-10-01), Nealon et al.
patent: 5469468 (1995-11-01), Schilling
patent: 5506863 (1996-04-01), Meidan et al.

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