Cambridge Silicon Radio Limited

Samsung Electronics Co., Ltd.

Qualcomm Technologies International, Ltd.

Dean Armstrong

Alexander Thoukydides

Thomas Christopher Grocutt

Marco Merlin

Albert Cesari-Bohigas

Methods, apparatuses, and systems for using Digital Signal Processing (DSP) to detect, measure, and/or compensate for, antenna load mismatch are described. One method provides a test sweep signal as digital input to a Digital-to-Analog Converter (DAC) in a transmit path ending with an antenna, and determines a transmit transfer function based on the digital input and digital output from an Analog-to-Digital Converter (ADC) in a loopback path which is electrically connected in parallel with a load impedance of the antenna. The determined transmit transfer function may be used for any of detecting, measuring, and compensating for, antenna mismatch.

Digital compensation for antenna load mismatch

A communication device comprising: a receiver operable to receive radio transmissions according to a first communication protocol; a transmitter operable to transmit radio transmissions according to a second communication protocol; and an arbiter connected to the receiver and transmitter; wherein the arbiter is configured to: receive from the transmitter an indication of a first transmit operation intended for performance during a first time period and one or more intended transmit characteristics of the first transmit operation, including a representation of the intended transmit power; determine whether the receiver intends to perform a communication operation during the first time period; determine in dependence on the transmit characteristics and the receive quality, a set of one or more threshold transmit characteristics for the first transmit operation; and cause the transmitter to proceed with the first transmit operation only if its transmit characteristics are constrained in accordance with the threshold transmit characteristics.

Power-aware coexistence

A communication device arranged to communicate data with another device at a given time instant according to either a first communication protocol or a second communication protocol, the communication device being constrained to transmit data according to the first communication protocol during a transmission window of predetermined duration that commences at a predetermined time instant and being arranged to, in dependence on a data communication according to the second communication protocol to be made by the communication device during that transmission window, select a time instant in that same transmission window for commencing a data transmission according to the first communication protocol.

Adaptive scheduling

A receiver for receiving data carried by multiple carriers, the receiver having: estimation means for forming an estimate of the reliability with which data from one or more of the carriers is received as distinct from the reliability with which data from one or more other of the carriers is received; and a decoder arranged for forming an estimate of the symbols represented by the data received from the carriers in dependence on the estimate of reliability.

Treating carrier-specific interference

A method for interpreting timing information at a communication support entity operable to communicate wirelessly, includes the steps of: at a first time at the communication support entity, receiving an indicator of a predetermined form over a link from another communication support entity; receiving over the link data representing one or more relative times; interpreting each such relative time represented by the received data as indicating the absolute time that is offset after the first time by the respective relative time together optionally with a latency value; and determining in dependence on the received data the manner in which the communication support entity is to communicate wirelessly at that absolute time.

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Cambridge, United Kingdom

Dean Armstrong