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System for and method of jointly optimizing the transmit antenna patterns of two geostationary satellites in a satellite broadcasting system

  • US 6,470,058 B1
  • Filed: 06/11/2001
  • Issued: 10/22/2002
  • Est. Priority Date: 06/11/2001
  • Status: Expired due to Fees
First Claim
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1. A method of optimizing the antenna patterns on a first satellite and a second satellite that operate in conjunction to deliver content to a single radio receiver, the method comprising the steps of:

  • (a) selecting an objective predictive model for predicting link margin at a first location and a link margin at a second location;

    (b) determining respective required transmit power-flux densities to achieve the first and second link margins;

    (c) adjusting the power flux density for the first location by decreasing the power flux density for the first satellite and simultaneously increasing the power flux density for the second satellite, the step of adjusting comprising varying the respective antenna patterns of the first and second satellites;

    (d) calculating a predicted joint availability for the first location; and

    (e) decreasing the power flux density for both the first and second satellites for the first location by adjusting the antenna patterns for the first and second satellites when it is determined that the required power flux density and joint availability for the second location cannot be attained.

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