Data broadcast to microterminals via satellite using spread-spectrum techniques

The techniques, equipment, and design of a pilot program for establishment of an Intergovernmental Bureau for Information Network (IBINET) to supply ready access to data files by all IBI members, are described. IBINET is designed to distribute data bases to microcomputers or minicomputers situated at remote sites through satellite links to the receive-only stations. The receiver stations would need a 3-11 m antenna for operation in the 3.7-4.2 GHz band. The signals would be broadcast using spread-spectrum techniques to enhance reliability in the presence of strong interference and to divide the 9.6 kbps signal over a 5 MHz bandwidth. Spreading is effected by encoding the modulated signal with a 2.4576 Mbps pseudo-random PSK data stream. Highly directive broadcasting capabilities would be included in the spacecraft used, which will probably be an Intelsat V.