METHOD AND SYSTEM FOR ESTIMATING THE DIRECTION OF ARRIVAL OF A TARGET SIGNAL RELATIVE TO A SATELLITE
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Abstract
A method and system for estimating a direction of arrival of a target signal relative to a measuring antenna array of an earth-orbiting satellite. The direction of arrival of the target signal being estimated on the basis of measurement signals corresponding to the target signal received respectively by at least a first measuring antenna and a second measuring antenna of the measuring antenna array. Each of the measurement signals are combined with a reference signal corresponding to the target signal received by a receiving antenna of the satellite. The receiving antenna has a maximum gain greater than the respective maximum gains of the first measuring antenna and of the second measuring antenna. The direction of arrival of the target signal is estimated from the signals obtained by combining the measurement signals with the reference signal.
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Citations
30 Claims
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1-15. -15. (canceled)
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16. A method for estimating a direction of arrival of a target signal with respect to an array of measurement antennas of a satellite in terrestrial orbit, comprising the steps of:
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estimating the direction of arrival of the target signal as a function of measurement signals, corresponding to the target signal received by respectively at least a first measurement antenna and a second measurement antenna of the array of measurement antennas; combining each of the measurement signals with a reference signal corresponding to the target signal received by a reception antenna of the satellite having a maximum gain greater than respective maximum gains of the first measurement antenna and of the second measurement antenna; and estimating the direction of arrival of the target signal on the basis of the signals obtained by combining each of the measurement signals with the reference signal. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A system for estimating a direction of arrival of a target signal, comprising:
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a satellite in terrestrial orbit comprising an array of measurement antennas; a processor for estimating the direction of arrival of the target signal as a function of measurement signals corresponding to the target signal received by respectively at least a first measurement antenna and a second measurement antenna of the array of measurement antennas; a circuit to combine each of the measurement signals with a reference signal corresponding to the target signal received by a reception antenna of the satellite having a maximum gain greater than respective maximum gains of the first measurement antenna and of the second measurement antenna; and wherein the processor estimates the direction of arrival of the target signal on the basis of the signals obtained by combining each of the measurement signals with the reference signal. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification