Blackberry Corporation

Research in Motion Corporation

Ecosystem Informatics Inc.

Mohamed Bakr

Shirook M Ali

James Paul Warden

Embodiments herein generally relate to methods and systems for using a forward calibration model to generate calibrated values for ambient parameters. In at least one example, the method for calibrating a measured un-calibrated ambient parameter (AP) value, includes generating, using an optimization model, a predicted calibrated AP value corresponding to the un-calibrated ambient parameter (AP); inputting, into a trained forward calibration model: (i) the predicted calibrated AP value; and (ii) one or more accuracy-enhancing parameters; generating, using the trained forward calibration model, a predicted un-calibrated AP value; determining if an error difference between the predicted un-calibrated AP value and measured un-calibrated ambient parameter (AP) value, is below a pre-determined threshold; if not, using the optimization model, to generate an updated predicted calibrated AP value and iterating the method, and otherwise outputting the predicted calibrated AP value, as the calibrated AP value.

Method and system for using a forward calibration model to generate calibrated values for ambient parameters

Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency receiver system. The radio frequency receiver system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power received by the antenna is measured after each perturbation at the same node in the matching network. The measured power values are used by an optimizer in converging to a solution that provides the reflection coefficient of the antenna. The reflection coefficient of the antenna may be used to determine the input impedance of the antenna. The elements of the matching circuit are then adjusted to match the input impedance of the antenna.

Dynamic real-time calibration for antenna matching in a radio frequency receiver system

Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency transmitter system. The radio frequency transmitter system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power reflected by the antenna is measured after each perturbation at the same node within the tunable matching network. The power values are used by an optimizer in converging to a solution that provides input impedance of the antenna. The elements of the matching circuit are adjusted to match the input impedance of the antenna.

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Hamilton, Canada

Mohamed Bakr