Method and system for antenna pattern synthesis based on geographical distribution of subscribers
First Claim
1. A method for enabling communication between a satellite comprising a plurality of antenna elements which operate as a phased array, and a plurality of terrestrial-based subscribers distributed across a geographical area, the method comprising:
- (a) determining directions from the satellite to the plurality of terrestrial-based subscribers;
(b) grouping the plurality of terrestrial-based subscribers to a communication beam based on the directions;
(c) synthesizing a signal constraint matrix based on said grouping;
(d) forming a communication beam which covers an area occupied by the plurality of terrestrial-based subscribers based on the signal constraint matrix.
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Accused Products
Abstract
A method and system for antenna pattern synthesis based on geographical distribution of subscribers allows more efficient use of satellite power resources in order to provide communications services to terrestrial-based subscribers (FIG. 1, 105, 115, 125, and 135). The method entails the grouping of terrestrial-based subscribers into communication beams (FIG. 5, 530) where gain is maximized (550) at the centroid of each beam. Additionally, gain in the directions of interfering emitters is minimized (540). A processor (FIG. 7, 740), which can be resident within a satellite (200), can perform the necessary processing to synthesize communication beams which service the terrestrial-based subscribers (105, 115, 125, and 135).
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Citations
11 Claims
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1. A method for enabling communication between a satellite comprising a plurality of antenna elements which operate as a phased array, and a plurality of terrestrial-based subscribers distributed across a geographical area, the method comprising:
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(a) determining directions from the satellite to the plurality of terrestrial-based subscribers; (b) grouping the plurality of terrestrial-based subscribers to a communication beam based on the directions; (c) synthesizing a signal constraint matrix based on said grouping; (d) forming a communication beam which covers an area occupied by the plurality of terrestrial-based subscribers based on the signal constraint matrix. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for forming a plurality of communication beams which enables communication between a satellite and a plurality of terrestrial-based subscribers comprising:
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a plurality of antenna elements which receive radio signals from the plurality of terrestrial-based subscribers; and a processor which determines a number of communication beams required to enable communication between the satellite and the plurality of terrestrial-based subscribers based on a geographical distribution of the plurality of terrestrial-based subscribers, wherein the processor synthesizes a signal constraint matrix and forms the communication beams based on the signal constraint matrix. - View Dependent Claims (8, 9, 10, 11)
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Specification