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Adaptive coding scheme for a processing communications satellite

  • US 6,625,776 B1
  • Filed: 09/30/1998
  • Issued: 09/23/2003
  • Est. Priority Date: 09/30/1998
  • Status: Expired due to Term
First Claim
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1. In a satellite communications system including terminals which send and receive data through a satellite, a method for adaptive error control coding of data in a downlink the method comprising the steps of:

  • receiving at a destination terminal a downlink including light coded data transmitted by a satellite;

    determining a first data error rate associated with said light coded data;

    when said first data error rate exceeds a first threshold, commanding said originating terminal to subsequently select transmission of heavy coded data having a code rate less than said light coded data in said downlink to said destination terminal;

    when said first data error rate falls below a second threshold, commanding said originating terminal to subsequently select transmission of light coded data in said downlink to said destination terminal;

    establishing an enter-suspension threshold;

    determining a second data error rate associated with said heavy coded data; and

    commanding said first originating terminal to suspend transmission when said second data error rate exceeds said enter-suspension threshold, wherein said first threshold is different from said second threshold and said enter-suspension threshold.

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