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US 10,897,275 B2Granted
Polar modulation systems and methods
AssigneeIntel Corporation
InventorsChristoph Preissl, Tobias Buckel, Thomas Mayer, Peter Preyler
Life of this patent
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Abstract
In a modulation correction method, an adjusted amplitude is determined based on an amplitude between adjacent zero crossings of a modulated signal, the adjacent zero crossings are shifted to determine shifted zero crossings, and the modulated signal is adapted based on the adjusted amplitude and the shifted zero crossings to generate a corrected modulated signal corresponding to the modulated signal.
Claims20
A modulation correction method, comprising:
- determining an adjusted amplitude by determining an average change in amplitude between adjacent zero crossings of a modulated signal;
- shifting the adjacent zero crossings to determine shifted zero crossings;
- and
- adapting the modulated signal based on the adjusted amplitude and the shifted zero crossings to generate a corrected modulated signal corresponding to the modulated signal.
1 more element
A modulation correction method, comprising:
- determining adjacent zero crossings of a modulated signal to determine edge locations of a signal pulse of the modulated signal;
- determining a difference between a change in amplitude of an ideal band-limited signal between adjacent zero crossings and an average change in amplitude of the modulated signal between adjacent zero crossings to determine an error signal of the modulated signal;
- processing the modulated signal to compensate for the error signal of the modulated signal;
- and
- generating a corrected modulated signal based on the processed moduated signal.
2 more elements
A polar transmitter, comprising:
- a zero-crossing calculator configured to calculate adjacent zero crossings of a signal;
- an amplitude calculator configured to calculate an adjusted amplitude of the signal by determining an average change in amplitude between the adjacent zero crossings of the signal;
- an edge-shift calculator configured to shift the adjacent zero crossings to generate corresponding shifted zero crossings of the signal;
- and
- a radio-frequency (RF) digital-to-analog converter (DAC) configured to generate a corrected modulated signal based on the adjusted amplitude and the shifted zero crossings of the signal.
2 more elements
Dependencies are inferred from the claim text.