Methods and systems for tracking signals with diverse polarization properties
First Claim
1. A method for antenna tracking, comprising:
- determining complex weightings for matching a polarization of an incident signal on a data channel; and
applying the complex weightings to a tracking channel such that an antenna system polarization is matched to the polarization of the incident signal.
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Accused Products
Abstract
Methods and systems for tracking signals with diverse polarization properties address both sensitivity and antenna tracking performance issues. In one embodiment, complex weightings for matching a polarization of an incident signal on a data channel are determined, and the complex weightings are applied to a tracking channel such that an antenna system polarization is matched to the polarization of the incident signal. In another embodiment, orthogonally polarized tracking channel components of an incident signal are processed to make a determination as to which of the orthogonally polarized tracking channel components is stronger, and this determination is used to select a polarization of a data channel to reduce a polarization mismatch loss.
14 Citations
16 Claims
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1. A method for antenna tracking, comprising:
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determining complex weightings for matching a polarization of an incident signal on a data channel; and
applying the complex weightings to a tracking channel such that an antenna system polarization is matched to the polarization of the incident signal. - View Dependent Claims (2)
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3. A method for antenna tracking, comprising:
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deriving complex weighting values that match a polarization of an incident signal on a data channel; and
applying the complex weighting values and time variations of the complex weighting values to a tracking channel to replicate the polarization of the incident signal over time.
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4. A system for antenna tracking, comprising:
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means for measuring a polarization of an incident signal on a data channel and for determining an amplitude and phase combination that matches the polarization; and
means for applying the amplitude and phase combination to a tracking channel responding to variations in the polarization. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A method for antenna tracking, comprising:
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processing orthogonally polarized tracking channel components of an incident signal to make a determination as to which of the orthogonally polarized tracking channel components is stronger; and
using the determination to select a polarization of a data channel to reduce a polarization mismatch loss.
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12. A method for antenna tracking, comprising:
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determining which of two orthogonal polarization components of an incident signal is a stronger signal component;
determining a polarization mismatch loss for two orthogonal polarization components;
weighing a tracking response amplitude by the polarization mismatch loss; and
selecting a polarization of a data channel depending upon the stronger signal component.
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13. A system for antenna tracking, comprising:
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means for detecting orthogonally polarized signals of a tracking channel, determining which of the orthogonally polarized signals is stronger, and suppressing a cross polarization response of the tracking channel; and
a controller configured to select a polarization of a data channel depending upon which of the orthogonally polarized signals is stronger. - View Dependent Claims (14, 15, 16)
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Specification