Blackberry Corporation

Shirook M H Ali

Amir Danak

James P Warden

Mark Pecen

Michael Eoin Buckley

Anmol Bhardwaj

A system that incorporates teachings of the subject disclosure may include, for example, accessing a group of de-coupling data stored in a memory of a communication device where the group of de-coupling data is mapped to corresponding use cases associated with the communication device, selecting de-coupling data from among the group of de-coupling data according to a determined use case of the communication device, generating a pre-distortion signal according to the selected de-coupling data, combining the pre-distortion signal with RF signals to generate pre-distorted RF signals, and transmitting the pre-distorted RF signals via a multi-port antenna of the communication device. Other embodiments are disclosed.

Mutual coupling mitigation in a multi-port antenna system

A system that incorporates teachings of the subject disclosure may include, for example, determining a first voltage standing wave ratio (VSWR), selecting a VSWR circle from among a group of VSWR circles based on the first VSWR, identifying a group of sets of tuning settings for variable reactance elements of a matching network of the communication device where the identifying of the group of sets of tuning settings is based on each set of tuning settings of the group of sets of tuning settings being associated with the VSWR circle, and selecting a set of tuning settings from among the group of sets of tuning settings responsive to a second VSWR determined for the set of tuning settings satisfying a VSWR threshold. Other embodiments are disclosed.

Methods and apparatus for performing impedance matching

A system that incorporates teachings of the subject disclosure may include, for example, identifying a usage mode of the communication device, running a calibration session that includes adjusting a starting point for tuning of the matching network based on a categorized history of previous tuning search paths and based on the usage mode where the categorized history of previous tuning search paths is generated based on monitoring previous tuning search paths during previous tuning and based on monitoring previous usage modes during the previous tuning, and adjusting a tuning search path for the tuning of the matching network based on the categorized history of previous tuning search paths and the usage mode where the adjusting of the starting point and the adjusting of the tuning search path reduces a tuning search time and provides a unique solution for the tuning. Other embodiments are disclosed.

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Waterloo, Canada

Shirook M H Ali