An output-only nonlinear system identification technique suited to integer arithmetic

Abstract

In most designs, residual nonlinearity is considered an inescapable curse—even when it is known to be present, it is often assumed to be too unpredictable or unstable to be dealt with in postprocessing. However, with the aid of outputonly system identification, this is no longer the case. We have developed a new technique for compensation of static nonlinear distortion using the internal noise of the device. It improves upon previous approaches by allowing highly-efficient fixed-point implementation, and represents the first step towards direct integration with analog hardware in order to produce an ADC that is blind to its analog frontend.