Dynamic effective isotropic radiated power spectral density control
First Claim
1. An aeronautical satellite broadband communications system, comprising:
- an antenna defined by a transmit gain pattern varying according to an orientation relative to a geostationary orbit satellite;
an antenna controller unit connected to an aircraft inertial navigation system and receptive to navigation data therefrom, a set of antenna orientation data being derived from the navigation data on a real-time basis;
a broadband controller connected to the antenna controller unit, and generating a set of output variables as a function of normalized equivalent isotropic radiated power spectral density values of the antenna derived from the transmit gain pattern and the set of antenna orientation data, the set of output variables controlling output power and carrier bandwidth of transmissions from the antenna within predefined limits of equivalent isotropic radiated power spectral density varying with values of the set of antenna orientation data; and
a satellite modem connected to the antenna and to the broadband controller, the output power and carrier bandwidth of the satellite modem to the antenna being set based upon the output variables from the broadband controller.
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Accused Products
Abstract
An aeronautical satellite broadband communications system has an antenna defined by a transmit gain pattern varying according to an orientation relative to a geostationary orbit satellite. An antenna controller unit is connected to an aircraft inertial navigation system and receptive to navigation data therefrom, and a set of antenna orientation data is derived from the navigation data on a real-time basis. A broadband controller connected to the antenna controller unit generates a set of output variables as a function of normalized equivalent isotropic radiated power spectral density values of the antenna and the set of antenna orientation data. The set of output variables controls the output power and carrier bandwidth of transmissions from the antenna within predefined limits of equivalent isotropic radiated power spectral density that vary with values of the set of antenna orientation data.
34 Citations
20 Claims
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1. An aeronautical satellite broadband communications system, comprising:
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an antenna defined by a transmit gain pattern varying according to an orientation relative to a geostationary orbit satellite; an antenna controller unit connected to an aircraft inertial navigation system and receptive to navigation data therefrom, a set of antenna orientation data being derived from the navigation data on a real-time basis; a broadband controller connected to the antenna controller unit, and generating a set of output variables as a function of normalized equivalent isotropic radiated power spectral density values of the antenna derived from the transmit gain pattern and the set of antenna orientation data, the set of output variables controlling output power and carrier bandwidth of transmissions from the antenna within predefined limits of equivalent isotropic radiated power spectral density varying with values of the set of antenna orientation data; and a satellite modem connected to the antenna and to the broadband controller, the output power and carrier bandwidth of the satellite modem to the antenna being set based upon the output variables from the broadband controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling equivalent isotropic radiated power spectral density of a communications link between an aircraft and a geosynchronous orbit satellite, the method comprising:
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retrieving navigation data from an avionics bus of the aircraft; selecting a satellite beam from a plurality of available satellite beams for establishing the communications link to the geosynchronous orbit satellite, each of the satellite beams being associated with a regulatory compliance mask; retrieving antenna orientation data from an antenna controller unit, the antenna orientation data being derived from the navigation data and is representative of an orientation of the antenna relative to the geosynchronous orbit satellite; generating, on a broadband controller, a set of output variables as a function of the antenna orientation data, a set of normalized equivalent isotropic radiated power spectral density values for an antenna mounted to the aircraft, and the regulatory compliance mask; and relaying the output variables to a modem, an output power and a carrier bandwidth of the satellite beam transmitted from the antenna being controllable by the output variables for transmissions to be within predefined limits of equivalent isotropic radiated power spectral density. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer readable medium connectible to an aeronautical satellite broadband communications system including instructions executable by the system for performing a method of controlling equivalent isotropic radiated power spectral density of a communications link between the system and a geosynchronous orbit satellite, the method comprising:
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retrieving navigation data from an avionics bus of the aircraft; selecting a satellite beam from a plurality of available satellite beams for establishing the communications link to the geosynchronous orbit satellite, each of the satellite beams being associated with a regulatory compliance mask; retrieving antenna orientation data from an antenna controller unit, the antenna orientation data being derived from the navigation data and is representative of an orientation of the antenna relative to the geosynchronous orbit satellite; generating, on a broadband controller, a set of output variables as a function of the antenna orientation data, a set of normalized equivalent isotropic radiated power spectral density values for an antenna mounted to the aircraft, and the regulatory compliance mask; and relaying the output variables to a modem, an output power and a carrier bandwidth of the satellite beam transmitted from the antenna being controllable by the output variables for transmissions to be within predefined limits of equivalent isotropic radiated power spectral density.
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Specification