×

Packetized CDMA/TDM satellite communication system

  • US 5,875,181 A
  • Filed: 11/12/1997
  • Issued: 02/23/1999
  • Est. Priority Date: 07/18/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of signal processing for efficient multi-user satellite based communication, comprising the steps of:

  • creating a hybrid CDMA-TDM air interface between earth stations via a satellite;

    including;

    transmitting uplink CDMA signals in packet format from the earth stations to the satellite;

    demodulating at the satellite the uplink CDMA signals;

    switching the demodulated signals;

    modulating the switched signals into downlink TDM signals;

    combining the uplink CDMA packets into downlink TDM beams by packet switching techniques, such that downlink TDM packets are routed to the TDM beam serving the desired destination defined by packet addresses;

    where uplink CDMA signals are used for uplink communications from an earth station to the satellite and downlink TDM signals are used for downlink communications from the satellite to another earth station.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×