Stratospheric-based communication system for mobile users using additional phased array elements for interference rejection
First Claim
1. A communications system comprising:
- stratospheric platform having a payload controller and a phased array antenna having a plurality of main array antenna elements for generating a plurality of communication beams and a plurality of auxiliary elements for canceling interference from side lobes of the plurality of the communication beams;
a gateway station in communication with said stratospheric platform, said gateway station scaling user signals to form a plurality of main array element control signals and auxiliary element control signals, said gateway station communicating the main array element control signals and the auxiliary element control signals to the stratospheric platform;
said stratospheric platform forming the communication beams and the auxiliary element output to reduce interference from side lobes of the communication beams from the main array element control signals and the auxiliary element control signals.
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Abstract
A communication system has a stratospheric platform with a payload controller and a phased array antenna having a plurality of main array elements for generating a plurality of communication beams and a plurality of auxiliary elements for canceling interference between the communication beams. A gateway station communicates with the stratospheric platform. The gateway station scales the plurality of elements to form a reconfigurable plurality of beams. The gateway station communicates an embedded control signal to the stratospheric platform to communicate a scaling of elements to form the communication beams and the auxiliary element output. The auxiliary element output is used to provide interference canceling.
27 Citations
24 Claims
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1. A communications system comprising:
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stratospheric platform having a payload controller and a phased array antenna having a plurality of main array antenna elements for generating a plurality of communication beams and a plurality of auxiliary elements for canceling interference from side lobes of the plurality of the communication beams; a gateway station in communication with said stratospheric platform, said gateway station scaling user signals to form a plurality of main array element control signals and auxiliary element control signals, said gateway station communicating the main array element control signals and the auxiliary element control signals to the stratospheric platform; said stratospheric platform forming the communication beams and the auxiliary element output to reduce interference from side lobes of the communication beams from the main array element control signals and the auxiliary element control signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of controlling a communications system having a stratospheric platform with a phased array antenna having a plurality of main array elements and a plurality of auxiliary elements, said method comprising:
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scaling a plurality of user signals to form a plurality of main array element control signals and a plurality of auxiliary element control signals in a gateway station; communicating the main array element control signals and the plurality of auxiliary element control signals to a stratospheric platform; generating communication beams in response to scaling the plurality of user signals; generating auxiliary element outputs in response to the auxiliary element control signals at stratospheric platform; and reducing side lobe interference from side lobes communication beams in response to the auxiliary element outputs. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification