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US 8,576,769 B2Granted
Systems and methods for adaptive interference cancellation beamforming
AssigneeATC Technologies, LLC
InventorDunmin Zheng
Life of this patent
Estimating the term…
Abstract
Methods of operating a transceiver including an antenna having a plurality of antenna feed elements are disclosed. The methods include receiving a plurality of samples of a receive signal from the plurality of antenna feed elements, estimating locations of a plurality of signal sources from the plurality of receive signal samples, identifying a plurality of interference sources from among the plurality of signal sources, generating a plurality of antenna feed element weights wM in response to the locations of the interference sources, forming an antenna beam from the antenna to the geographic region using the antenna feed element weights wM, and communicating information over the antenna beam. Related transceivers, satellite gateways and satellites are also disclosed.
Claims22
A method of operating a transceiver including an antenna having a plurality of antenna feed elements, the method comprising:
- receiving a plurality of samples of a receive signal from the plurality of antenna feed elements;
- estimating locations of a plurality of signal sources from the plurality of receive signal samples;
- identifying a plurality of interference sources from among the plurality of signal sources;
- generating a plurality of antenna feed element weights wM in response to locations of the interference sources, wherein generating the plurality of antenna feed element weights comprises defining a plurality of antenna gain constraint values gk associated with a plurality of geographic constraint points within a geographic region and determining interference weighting factors for the geographic constraint points and locations of the interference sources, wherein the antenna feed element weights are generated in response to the interference weighting factors;
- forming an antenna beam from the antenna to the geographic region using the antenna feed element weights wM;
- and
- communicating information over the antenna beam.
4 more elements
A method of operating a transceiver including an antenna having a plurality of antenna feed elements, the method comprising:
- receiving a plurality of samples of a receive signal from the plurality of antenna feed elements;
- estimating locations of a plurality of signal sources from the plurality of receive signal samples;
- identifying a plurality of interference sources from among the plurality of signal sources;
- generating a plurality of antenna feed element weights wM in response to locations of the interference sources;
- forming an antenna beam from the antenna to the geographic region using the antenna feed element weights wM;
- and
- communicating information over the antenna beam;
- wherein estimating locations of the plurality of signal sources comprises:
- estimating an array covariance matrix for the plurality of antenna feed elements in response to the plurality of samples of the receive signal to form an array covariance matrix estimate;
- generating a spatial spectrum from the array covariance matrix estimate;
- and
- estimating directions of arrival of signals from the signal sources from largest peaks of the spatial spectrum.
9 more elements
A transceiver, comprising:
- an antenna having a plurality of antenna feed elements;
- and
- an electronics system including a beam former configured to:
- receive a plurality of samples of a receive signal from the plurality of antenna feed elements;
- estimate locations of a plurality of signal sources from the plurality of receive signal samples;
- identify a plurality of interference sources from among the plurality of signal sources;
- generate a plurality of antenna feed element weights wM in response to locations of the interference sources;
- and
- form an antenna beam from the antenna to the geographic region using the antenna feed element weights wM;
- wherein the electronics system is configured to communicate information over the antenna beam;
- and
- wherein the beam former is further configured to:
- define a plurality of antenna gain constraint values gk associated with a plurality of geographic constraint points within a geographic region;
- determine interference weighting factors for the geographic constraint points and locations of the interference sources;
- and
- generate the antenna feed element weights in response to the interference weighting factors.
13 more elements
A transceiver, comprising:
- an antenna having a plurality of antenna feed elements;
- and
- an electronics system including a beam former configured to:
- receive a plurality of samples of a receive signal from the plurality of antenna feed elements;
- estimate locations of a plurality of signal sources from the plurality of receive signal samples;
- identify a plurality of interference sources from among the plurality of signal sources;
- generate a plurality of antenna feed element weights wM in response to locations of the interference sources;
- and
- form an antenna beam from the antenna to the geographic region using the antenna feed element weights wM;
- wherein the electronics system is configured to communicate information over the antenna beam;
- and
- wherein the beam former is further configured to:
- estimate an array covariance matrix for the plurality of antenna feed elements in response to the plurality of samples of the receive signal to form an array covariance matrix estimate;
- generate a spatial spectrum from the array covariance matrix estimate;
- and
- estimate directions of arrival of signals from the plurality of signal sources from largest peaks of the spatial spectrum.
13 more elements
A communications satellite, comprising:
- an antenna having a plurality of antenna feed elements;
- and
- an electronics system including a beam former configured to:
- receive a plurality of samples of a receive signal from the plurality of antenna feed elements;
- estimate locations of a plurality of signal sources from the plurality of receive signal samples;
- identify a plurality of interference sources from among the plurality of signal sources;
- generate a plurality of antenna feed element weights wM in response to locations of the interference sources;
- and
- form an antenna beam from the antenna to the geographic region using the antenna feed element weights wM;
- wherein the electronics system is configured to communicate information over the antenna beam, and
- wherein the beam former is further configured to:
- define a plurality of antenna gain constraint values gk associated with a plurality of geographic constraint points within a geographic region;
- determine interference weighting factors for the geographic constraint points and locations of the interference sources;
- and
- generate the antenna feed element weights in response to the interference weighting factors.
12 more elements
A satellite gateway, comprising:
- an antenna;
- and
- an electronics system coupled to the antenna and including a beam former configured to:
- receive a plurality of samples of a receive signal from a plurality of satellite antenna feed elements;
- estimate locations of a plurality of signal sources from the plurality of receive signal samples;
- identify a plurality of interference sources from among the plurality of signal sources;
- generate a plurality of satellite antenna feed element weights wM in response to locations of the interference sources;
- and
- form an antenna beam from a satellite antenna to a geographic region using the antenna feed element weights wM;
- wherein the electronics system is configured to communicate information over the antenna beam;
- and
- wherein the beam former is further configured to:
- define a plurality of antenna gain constraint values gk associated with a plurality of geographic constraint points within a geographic region;
- determine interference weighting factors for the geographic constraint points and locations of the interference sources;
- and
- generate the antenna feed element weights in response to the interference weighting factors.
13 more elements
Dependencies are inferred from the claim text.