Method and apparatus for nonlinear signal processing
AssigneeIntel Corporation
InventorsHarald Enzinger, Steffen Trautmann
Life of this patent
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Abstract
The present disclosure relates to a concept of nonlinear signal processing which may be used for predistortion for RF power amplifiers. The concept includes generating time variant filter coefficients for a linear filter circuit based on a nonlinear mapping of an input signal, and filtering the input signal with the linear filter circuit using the time variant filter coefficients in order to generate a filtered output signal. Thus, it is proposed to implement a non-linear filter by a time-varying linear filter where the time-varying coefficients are derived from the input signal.
Claims16
A nonlinear signal processing device, comprising:
- a linear filter circuit configured to filter an input signal to generate a filtered output signal;
- and
- a coefficient generation circuit configured to generate time variant filter coefficients for the linear filter circuit based on a nonlinear mapping of the input signal.
A method of nonlinear signal processing, the method comprising:
- generating time variant filter coefficients for a linear filter circuit based on a nonlinear mapping of an input signal;
- and
- filtering the input signal with the linear filter circuit using the time variant filter coefficients to generate a filtered output signal.
A transmitter circuit, comprising:
- a linear digital filter circuit configured to filter a complex-valued baseband signal to generate a complex-valued predistorted baseband signal;
- and
- a coefficient generation circuit configured to generate time variant complex filter coefficients for the linear filter circuit based on a nonlinear mapping of the complex input signal,
- wherein the linear digital filter circuit and the time variant complex filter coefficients mimic a nonlinear distortion of a radio frequency (RF) power amplifier.
Dependencies are inferred from the claim text.