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Frequency hopped return link with net entry channel for a satellite personal communications system

  • US 5,638,361 A
  • Filed: 02/08/1995
  • Issued: 06/10/1997
  • Est. Priority Date: 02/08/1995
  • Status: Expired due to Term
First Claim
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1. In a satellite network communication system in which a plurality of subscriber handset terminals communicate with a ground hub station on traffic channels using spread spectrum orthogonal CDMA transmissions, the improvement comprising, said hub station including a control generator for generating a net entry control channel for communicating synchronization correction signals, including timing, frequency and power to said subscriber handset terminals and a return link receiver means, each subscriber handset terminal having a subscriber unit control channel receiver for receiving said synchronization correction signals, a subscriber unit return link transmitter connected to receive said synchronization correction signals so that signals from all subscriber handset terminals arrive at said hub station in time and frequency synchronism, said subscriber unit return link transmitter including frequency hopped spread spectrum carrier such that none of the signals occupies the same frequency bin at the same time.

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