Systems and methods for transmit power control
AssigneeQUALCOMM Incorporated
InventorsAngelica Wong, Haitao Gan, Rainer Gaethke, Niranjan Anand Talwalkar
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Abstract
A method for inductively coupled communication is described. The method includes transmitting a carrier signal from a first device while receiving the carrier signal at a receiver of the first device. The method also includes determining a carrier level estimation using a loopback path on the receiver of the first device. The method further includes controlling a transmit power level of the first device based on a coupling strength with a second device as indicated by the carrier level estimation.
Claims26
A method for inductively coupled communication, comprising:
- transmitting a carrier signal from a first device while receiving the transmitted carrier signal at a receiver of the first device;
- enabling a field detect path during a period before carrier signal modulation, wherein the field detect path bypasses down-converting the received transmitted carrier signal to baseband;
- determining a carrier level estimation of the received transmitted carrier signal using a loopback path on the receiver of the first device;
- and
- controlling a transmit power level of the first device based on a coupling strength with a second device as indicated by the carrier level estimation, wherein controlling the transmit power level comprises disabling the field detect path.
An electronic device for inductively coupled communication, comprising:
- a processor;
- memory in electronic communication with the processor;
- and
- instructions stored in the memory, the instructions being executable by the processor to:
- transmit a carrier signal from the electronic device while receiving the transmitted carrier signal at a receiver of the electronic device;
- enable a field detect path during a period before carrier signal modulation, wherein the field detect path bypasses down-converting the received transmitted carrier signal to baseband;
- determine a carrier level estimation of the received transmitted carrier signal using a loopback path on the receiver of the electronic device;
- and
- control a transmit power level of the electronic device based on a coupling strength with a second device as indicated by the carrier level estimation, wherein the instructions executable to control the transmit power level of the electronic device comprise instructions executable to disable the field detect path.
A non-transitory computer-readable medium having instructions thereon, the instructions comprising:
- code for causing an electronic device to transmit a carrier signal from the electronic device while receiving the transmitted carrier signal at a receiver of the electronic device;
- code for causing the electronic device to enable a field detect path during a period before carrier signal modulation, wherein the field detect path bypasses down-converting the received transmitted carrier signal to baseband;
- code for causing the electronic device to determine a carrier level estimation of the received transmitted carrier signal using a loopback path on the receiver of the electronic device;
- and
- code for causing the electronic device to control a transmit power level of the electronic device based on a coupling strength with a second device as indicated by the carrier level estimation, wherein the code for causing the electronic device to control the transmit power level comprises of the electronic device comprises code for causing the electronic device to disable the field detect path.
An apparatus for inductively coupled communication, comprising:
- means for transmitting a carrier signal from the apparatus while receiving the transmitted carrier signal at a receiver of the apparatus;
- means for enabling a field detect path during a period before carrier signal modulation, wherein the field detect path bypasses down-converting the received transmitted carrier signal to baseband;
- means for determining a carrier level estimation of the received transmitted carrier signal using a loopback path on the receiver of the apparatus;
- and
- means for controlling a transmit power level of the apparatus based on a coupling strength with a second device as indicated by the carrier level estimation, wherein the means for controlling the transmit power level of the apparatus comprises means for disabling the field detect path.
Dependencies are inferred from the claim text.