Compensating for a non-ideal surface of a reflector in a satellite communication system
First Claim
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1. A system comprising:
- a beamformer configured to measure amplitudes and phases of signals reflected off a reflector of a satellite, the amplitudes and phases forming a first set of measurements; and
a computing apparatus configured to calculate an element correlation matrix as a function of the first set of measurements, the element correlation matrix representing a radiated feed element pattern off the reflector,wherein the beamformer is configured to generate a formed beam pattern adjusted based on the element correlation matrix.
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Abstract
A method is provided that includes measuring amplitudes and phases of signals reflected off a reflector of a satellite, with the amplitudes and phases forming a first set of measurements. The method includes calculating an element correlation matrix as a function of the first set of measurements. The element correlation matrix represents a radiated feed element pattern off the reflector. And the method includes adjusting a formed beam pattern of a beamformer based on the element correlation matrix to thereby compensate for a non-ideal surface of the reflector.
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Citations
20 Claims
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1. A system comprising:
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a beamformer configured to measure amplitudes and phases of signals reflected off a reflector of a satellite, the amplitudes and phases forming a first set of measurements; and a computing apparatus configured to calculate an element correlation matrix as a function of the first set of measurements, the element correlation matrix representing a radiated feed element pattern off the reflector, wherein the beamformer is configured to generate a formed beam pattern adjusted based on the element correlation matrix. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method comprising:
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measuring amplitudes and phases of signals reflected off a reflector of a satellite, the amplitudes and phases forming a first set of measurements; calculating an element correlation matrix as a function of the first set of measurements, the element correlation matrix representing a radiated feed element pattern off the reflector; and adjusting a formed beam pattern of a beamformer based on the element correlation matrix. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method comprising:
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measuring amplitudes and phases of signals received by a satellite over feeder links, passed through a communication platform and reflected off a reflector of the satellite in a forward direction, the amplitudes and phases forming a first set of measurements; measuring the amplitudes and phases of the signals passed through the communication platform and returned back over the feeder links independent of the reflector, the respective amplitudes and phases forming a second set of measurements; calculating an element correlation matrix as a function of the first and second sets of measurements, the element correlation matrix representing a radiated feed element pattern off the reflector; and adjusting a formed beam pattern of a beamformer based on the element correlation matrix. - View Dependent Claims (14, 15, 16)
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17. A method comprising:
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measuring amplitudes and phases of signals reflected off a reflector of a satellite, and forwarded by the satellite to a beamformer in a return direction, the beamformer including first and second beamformers, and the amplitudes and phases forming a first set of measurements; measuring first and second amplitudes and phases of second signals received at respective ones of the first and second beamformers from the satellite over feeder links, the satellite having received the second signals over the feeder links independent of the reflector, the respective first and second amplitudes forming first and second second sets of measurements; calculating a difference measurement as a function of the difference between the first and second second sets of measurements; calculating an element correlation matrix as a function of the first set of measurements, first second set of measurements and difference measurement, the element correlation matrix representing a radiated feed element pattern off the reflector; and adjusting a formed beam pattern of a beamformer based on the element correlation matrix. - View Dependent Claims (18, 19, 20)
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Specification