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Spread spectrum system with random code retransmission

  • US 5,084,900 A
  • Filed: 12/21/1989
  • Issued: 01/28/1992
  • Est. Priority Date: 12/21/1989
  • Status: Expired due to Term
First Claim
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1. A communication system comprises of:

  • A hub station; and

    a plurality of terminal stations, said terminal stations adapted to provide an inbound communication link from each of said terminal stations to said hub station for sending digital data packets encoded with a CDMA code for code division multiple access during synchronized time slots on a contention channel, each of said digital data packets encoded with the same CDMA code during a first transmission, said terminal stations provided with CDMA code means for pseudorandomly selecting from a pool of alternative CDMA codes for encoding each packet with an alternate CDMA code during any subsequent transmission.

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