Detection of variation in load impedance of wireless communications devices
AssigneeCypress Semiconductor Corporation
InventorsVipul Kumar, Raghuram Kuchibhotla
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Abstract
Systems, methods, and devices detect variations in load impedances of wireless communications devices. Methods include determining a first distortion measurement of a transceiver based on a first comparison of a digital loopback path and a radio frequency (RF) loopback path, and determining a second distortion measurement of the transceiver based on a second comparison of the digital loopback path and the RF loopback path. Methods also include implementing, using a processor, a third comparison of the first distortion measurement and the second distortion measurement, and determining if there is a change in a load of the transceiver based on the third comparison.
Claims20
A method comprising:
- determining a first distortion measurement of a transceiver based on a first phase difference and a first amplitude difference between a digital loopback path and a radio frequency (RF) loopback path;
- determining a second distortion measurement of the transceiver based on a second phase difference and a second amplitude difference between the digital loopback path and the RF loopback path;
- implementing, using a processor, a comparison of the first distortion measurement and the second distortion measurement;
- and
- determining if there is a change in a load coupled to the transceiver based on the comparison.
A device comprising:
- a radio frequency (RF) loopback path coupled to an output of a power amplifier of a transceiver;
- a digital loopback path coupled between a digital input and a digital output of the transceiver;
- and
- a processor configured to:
- determine a first distortion measurement based on a first phase difference and a first amplitude difference between the digital loopback path and the RF loopback path;
- determine a second distortion measurement of the transceiver based on a second phase difference and a second amplitude difference between the digital loopback path and the RF loopback path;
- implement a comparison of the first distortion measurement and the second distortion measurement;
- and
- determine if there is a change in a load coupled to the transceiver based on the comparison.
A system comprising:
- an antenna;
- and
- a transceiver coupled to the antenna, the transceiver comprising:
- a radio frequency (RF) loopback path coupled to an output of a power amplifier of the transceiver;
- a digital loopback path coupled to between a digital input and a digital output of the transceiver;
- and
- a processor configured to:
- determine a first distortion measurement based on a first phase difference and a first amplitude difference between the digital loopback path and the RF loopback path;
- determine a second distortion measurement of the transceiver based on a second phase difference and a second amplitude difference between the digital loopback path and the RF loopback path;
- implement a comparison of the first distortion measurement and the second distortion measurement;
- and
- determine if there is a change in a load coupled to the transceiver based on the comparison.
Dependencies are inferred from the claim text.