Digital-to-time converter (DTC) non-linearity predistortion
AssigneeIntel Corporation
InventorsAssaf Ben-Bassat, Ofir Degani, Elan Banin, Shahar Gross, Phillip Skliar
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Abstract
A method for compensating signal nonlinearities includes generating a local oscillator (LO) signal and performing phase modulation of the LO signal to generate a phase-modulated LO signal. The phase modulation is based on applying at least one digital-to-time converter (DTC) code of a plurality of DTC codes to a rising edge signal portion and a falling edge signal portion associated with the LO signal. Nonlinearities associated with the rising edge signal portion and the falling edge signal portion are determined. The at least one DTC code is adjusted based on the nonlinearities.
Claims20
An apparatus for a communication device, the apparatus comprising:
- a digital-to-time converter (DTC) circuit to perform phase modulation of a local oscillator (LO) signal to generate a phase-modulated LO signal, wherein to perform the phase modulation, the DTC circuit is to:
- detect a rising edge signal portion and a falling edge signal portion associated with the LO signal;
- apply a first DTC code of a plurality of DTC codes to the rising edge signal portion;
- apply a second DTC code of the plurality of DTC codes to the falling edge signal portion, the plurality of DTC codes corresponding to a plurality of phases associated with the phase modulation;
- and
- generate a plurality of additional phase-modulated LO signals using a subset of the plurality of DTC codes;
- and
- a calibration circuit, the calibration circuit to:
- adjust at least one of the first DTC code and the second DTC code based on nonlinearities associated with the rising edge signal portion and the falling edge signal portion.
A method for compensating signal nonlinearities, the method comprising:
- generating a local oscillator (LO) signal;
- performing phase modulation of the LO signal to generate a phase-modulated LO signal, the phase modulation based on applying at least one digital-to-time converter (DTC) code of a plurality of DTC codes to a rising edge signal portion and a falling edge signal portion associated with the LO signal;
- determining nonlinearities associated with the rising edge signal portion and the falling edge signal portion;
- adjusting the at least one DTC code based on the nonlinearities;
- and
- generating a plurality of additional phase-modulated LO signals using a subset of the plurality of DTC codes.
At least one non-transitory machine-readable storage medium comprising instructions stored thereupon, which when executed by processing circuitry of a wireless device, cause the processing circuitry to perform operations comprising:
- generating a local oscillator (LO) signal;
- performing phase modulation of the LO signal to generate a phase-modulated LO signal, the phase modulation based on applying at least one digital-to-time converter (DTC) code of a plurality of DTC codes to a rising edge signal portion and a falling edge signal portion associated with the LO signal;
- determining nonlinearities associated with the rising edge signal portion and the falling edge signal portion;
- adjusting the at least one DTC code based on the nonlinearities;
- and
- generating a plurality of additional phase-modulated LO signals using a subset of the plurality of DTC codes.
Dependencies are inferred from the claim text.