Quadrature communication for wireless power transfer
AssigneeRenesas Electronics America Inc.
InventorsDamla Solmaz Acar, Mihail Jefremow, Jure Menart, Pooja Agrawal, Amit Bavisi, Gustavo James Mehas
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Abstract
Systems and methods for demodulating a signal is described. A device can receive a modulated signal that encodes data. The device can sample a voltage of the modulated signal to generate a plurality of samples in digital domain. The device can determine in-phase data and quadrature data of the plurality of samples. The device can determine amplitude data and phase data based on the in-phase data and the quadrature data. The device can decode the amplitude data and phase data into digital symbols that represent the data encoded in the modulated signal.
Claims18
A method for communication in wireless power systems, the method comprising:
- receiving a message, wherein the received message indicates that a modulated signal is amplitude modulated and phase modulated in quadrature space;
- receiving the modulated signal that encodes data;
- sampling a voltage of the modulated signal to generate a plurality of samples in digital domain;
- determining in-phase data and quadrature data of the plurality of samples;
- determining amplitude data and phase data based on the in-phase data and the quadrature data;
- and
- decoding the amplitude data and phase data into digital symbols that represent the data encoded in the modulated signal.
An apparatus comprising:
- a resonant circuit including a capacitor and an inductor;
- an analog front end (AFE) configured to:
- measure a voltage across the capacitor, wherein the voltage is a voltage of a modulated signal received by the inductor;
- and
- sample the voltage to generate a plurality of samples in digital domain;
- a controller configured to:
- determine in-phase data and quadrature data of the plurality of samples;
- determine amplitude data and phase data based on the in-phase data and the quadrature data;
- and
- decode the amplitude data and phase data into digital symbols that represent data encoded in the modulated signal.
A semiconductor device comprising:
- a memory configured to store a lookup table;
- a processor configured to:
- receive a message, wherein the received message indicates that a modulated signal is amplitude modulated and phase modulated in quadrature space;
- receive a plurality of digital samples of a voltage of the modulated signal;
- and
- determine in-phase data and quadrature data of the plurality of digital samples;
- use the lookup table to determine amplitude data and phase data based on the in-phase data and the quadrature data;
- and
- decode the amplitude data and phase data into digital symbols that represent data encoded in the modulated signal.
Dependencies are inferred from the claim text.