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US 8,942,299 B2Granted
Baseband beamforming
AssigneeQUALCOMM Incorporated
InventorsSaihua Lin, Roger Brockenbrough
Life of this patent
Estimating the term…
Abstract
Exemplary embodiments are directed to beamforming. A device may include a plurality of inputs for receiving differential in-phase and quadrature data. The device may further include a plurality of switching elements coupled to the plurality of inputs and configured to enable for rotation of the differential in-phase and quadrature data at baseband.
Claims25
A device, comprising:
- a plurality of inputs for receiving differential in-phase and quadrature data;
- and
- a plurality of switching elements coupled to the plurality of inputs and configured to enable rotation of the differential in-phase and quadrature data at baseband by combining currents from a plurality of current sources.
A device, comprising:
- a plurality of mixers for conveying differential in-phase and quadrature signals;
- at least one phase rotator configured to receive the differential in-phase and quadrature signals and comprising:
- a plurality of switching elements configured to enable rotation of the differential in-phase and quadrature signals at baseband by combining currents from a plurality of current sources;
- and
- the plurality of current sources coupled to the plurality of switches.
2 more elements
A phase rotator, comprising:
- a plurality of inputs for receiving differential in-phase and quadrature data;
- and
- a plurality of switching elements to enable rotation of the differential in-phase and quadrature data at baseband by combining currents from a plurality of current sources.
A method, comprising:
- receiving quadrature and in-phase data at a phase rotator;
- and
- receiving at least one control signal at the phase rotator to select a desired phase shift;
- and
- rotating the quadrature and in-phase data at baseband according to the desired phase shift by combining currents from a plurality of current sources.
2 more elements
A method, comprising:
- selecting by a controller at least one quadrant of a plurality of quadrants based on a desired phase shift;
- and
- rotating at least one of a quadrature signal and the in-phase signal at baseband to generate at least one of a rotated quadrature signal and a rotated in-phase signal by combining currents from a plurality of current sources.
A device, comprising:
- means for receiving quadrature and in-phase data at a phase rotator;
- and
- means for rotating the quadrature and in-phase data at baseband according to the desired phase shift by combining currents from a plurality of current sources.
A device, comprising:
- means for selecting at least one quadrant of a plurality of quadrants based on a desired phase shift;
- and
- means for rotating at least one of a quadrature signal and the in-phase signal at baseband to generate at least one of a rotated quadrature signal and a rotated in-phase signal by combining currents from a plurality of current sources.
Dependencies are inferred from the claim text.