FREQUENCY HOPPED RETURN LINK WITH NET ENTRY CHANNEL FOR A SATELLITE PERSONAL COMMUNICATIONS SYSTEM

摘要

A satellite network communication system in which a plurality of subscriber handset terminals (14) communicate with a ground hub station (12) on traffic frequency channels (15) using spread spectrum orthogonal CDMA transmissions. The hub station includes a control generator for generating a net entry control channel (10) 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.