Low-power and low-cost adaptive self-linearization system with fast convergence

摘要

A signal processing method includes inputting a digital signal, providing a plurality of coefficients; and determining an output. The output is approximately equal to an aggregate of a plurality of linear reference components, and each of the linear reference components is approximately equal to an aggregate of a corresponding set of digital signal samples that is scaled by the plurality of coefficients.

主权项

1. A system, comprising:
a radio frequency receiver configured to receive an undistorted signal; a separation block configured to:
generate, using a plurality of adaptable coefficient multipliers, a reference signal component of a signal and an error signal, wherein the signal is a distorted version of the undistorted signal,update the plurality of adaptable coefficient multipliers based on the error signal, andgenerate, based on the reference signal component, a target signal component of the signal; a digital signal processor (DSP) configured to:
filter the reference signal component according to a plurality of filter coefficients to provide an output signal that is substantially similar to the target signal component, andadjust the plurality of filter coefficients to drive a feedback signal to a predetermined level; and a combiner configured to subtract the output signal and the target signal component to provide the feedback signal.