Capacity maximization for a unicast spot beam satellite system
First Claim
1. A method for selecting a parameter for the design of a communication satellite comprising:
- selecting a spot beam pattern comprising a plurality of spot beams directed to a plurality of corresponding regions of the earth, the spot beam pattern resulting in interference between spot beams;
calculating antenna gains as a function of location at locations within one of the plurality of spot beams;
calculating signal qualities as a function of the antenna gain at the locations, wherein the signal qualities include signal to noise and signal to interference ratios;
calculating location-specific data-carrying capacities based on the signal qualities at the locations;
calculating an average capacity from the location-specific data-carrying capacities for the locations; and
selecting at least one parameter of the satellite based at least in part on the average capacity.
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Accused Products
Abstract
Methods, systems, and apparatuses are presented for improved satellite communications. The satellite system may comprises at least one gateway, a satellite in orbit configured to communicate with the at least one gateway and provide a plurality of spot beams, and a plurality of subscriber terminals. The spot beams may include a first spot beam to illuminate a first region and a second spot beam to illuminate a second region adjacent to and overlapping with the first region. The first spot beam as sent to at least one subscriber terminal may be affected by (1) interference from other signal sources including the second spot beam at a signal-to-interference ratio C/I and (2) noise at a signal-to-noise ratio C/N. Reception of signals from the first spot beam by the at least one of the first plurality of subscriber terminals may be interference-dominated such that C/I is less than C/N.
34 Citations
19 Claims
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1. A method for selecting a parameter for the design of a communication satellite comprising:
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selecting a spot beam pattern comprising a plurality of spot beams directed to a plurality of corresponding regions of the earth, the spot beam pattern resulting in interference between spot beams; calculating antenna gains as a function of location at locations within one of the plurality of spot beams; calculating signal qualities as a function of the antenna gain at the locations, wherein the signal qualities include signal to noise and signal to interference ratios; calculating location-specific data-carrying capacities based on the signal qualities at the locations; calculating an average capacity from the location-specific data-carrying capacities for the locations; and selecting at least one parameter of the satellite based at least in part on the average capacity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification