In a growing number of applications, there is need to digitize signals whose spectral characteristics are challenging for traditional Analog-to-Digital Converters (ADCs). Examples, among others, include systems where the ADC must acquire at once very wide but sparsely and dynamically occupied bandwidth supporting diverse services, as well signal interest subject strong narrowband co-channel int...

Abstract A control-bounded analog-to-digital converter consists of a linear analog system that is subject to digital control, and filter estimates the input signal from control signals. Such converters have many commonalities with delta–sigma converters, but they can use more general filters. The paper describes operating principle, gives transfer function analysis, filtering. In addition, disc...

This paper presents an adaptive digital resolution improvement method for extrapolating and recursive analog-to-digital converters (ADCs). The presented adaptively enhanced ADC (AE-ADC) digitally estimates the digital equivalent of the input signal by utilizing an adaptive digital filter (ADF). The least mean squares (LMS) algorithm also determines the coefficients of the ADF block. In this sch...

280 INTRODUCTION Accurate collection and processing of electromagnetic information is critical to a wide variety of applications. Present day RF and microwave sensor systems must cover many frequency bands, detect and identify a large range of signal powers, and analyze the signal information on an ever-decreasing time scale. Simultaneously achieving these attributes typically requires multiple...