Method and system for automatic power control (APC) in a communications device that communicates via inductive coupling
AssigneeNXP B.V.
InventorsGernot Hueber, Ian Thomas Macnamara
Life of this patent
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Abstract
Embodiments of methods and systems for automatic power control (APC) in a communications device that communicates via inductive coupling are described. In an embodiment, a method for APC in a communications device that communicates via inductive coupling involves obtaining multiple system parameters, determining an APC configuration of the communications device from the system parameters, and controlling a transmission configuration of the communications device based on the APC configuration. Other embodiments are also described.
Claims19
A method for automatic power control (APC) in a communications device that communicates via inductive coupling, the method comprising:
- obtaining a plurality of system parameters that include a particular system parameter having a monotonic relationship with respect to a distance between the communications device and a counterpart communications device;
- determining an APC configuration of the communications device from the plurality of system parameters, wherein determining the APC configuration of the communications device from the plurality of system parameters comprises using the system parameters as input variables, selecting a transmission configuration profile from a lookup table of profiles;
- and
- controlling a transmission configuration of the communications device based on the APC configuration.
An automatic power control (APC) unit for a communications device that communicates via inductive coupling, the APC unit comprising:
- a system parameter obtaining unit configured to obtain a plurality of system parameters that include a particular system parameter having a monotonic relationship with respect to a distance between the communications device and a counterpart communications device;
- an APC configuration determination unit configured to determine an APC configuration of the communications device from the plurality of system parameters, wherein the APC configuration determination unit is further configured to, using the plurality of system parameters as input variables, select a transmission configuration profile from a lookup table of profiles;
- and
- a transmission configuration control unit configured to control a transmission configuration of the communications device based on the APC configuration.
A method for automatic power control (APC) in a communications device that communicates via inductive coupling, the method comprising:
- obtaining a received signal strength indicator (RSSI) determined at the communications device and a transmitter current measured at the communications device having a monotonic relationship with respect to a distance between the communications device and a counterpart communications device;
- determining an APC configuration of the communications device from the RSSI and the transmitter current, wherein determining the APC configuration of the communications device from the RSSI and the transmitter current comprises using the RSSI and the transmitter current as input variables, selecting a transmission configuration profile from a lookup table of profiles;
- and
- controlling a transmission configuration of the communications device based on the APC configuration, wherein the transmission configuration corresponds to a load modulation amplitude of the communications device.
Dependencies are inferred from the claim text.