Frequency-Hoped Return Link with Net Entry Channels for Satellite Personal Communications Systems

摘要

The present invention relates to a satellite network communication system in which a plurality of subscriber handset terminals (14) communicate with terrestrial hub stations on a traffic frequency channel (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, power) to the subscriber handset terminal and the return link receiver. Each subscriber handset terminal includes a subscriber unit control channel receiver to receive the control channel synchronization correction signal and a subscriber unit return link transmitter coupled to receive the synchronization correction signal so that signals from all subscriber handset terminals are timed. And frequency synchronized with the hub station. The subscriber unit return link transmitter includes a spread spectrum carrier that is frequency-hopped such that none of the signals can occupy the same frequency bin at the same time.