Adaptive Reference Levels in a Level-Crossing Analog-to-Digital Converter. (23rd November 2008)

• Record Type: Journal Article
• Authors: Guan Guan, Karen M. Karen M.; Kozat Kozat, Suleyman S. Suleyman S.; Singer Singer, Andrew C. Andrew C.
• Other Names: Theodoridis Theodoridis Sergios Sergios Academic Editor.
• Is Part Of: EURASIP journal on advances in signal processing. Volume 2008(2008)
• Publication Date: 2008-11-23
• Subjects: Signal processing -- Periodicals; Traitement du signal; Signal processing; Periodicals; 621.3822
• DOI: 10.1155/2008/513706
• Languages: English
• ISSNs: 1687-6172

Abstract

Abstract : Level-crossing analog-to-digital converters (LC ADCs) have been considered in the literature and have been shown to efficiently sample certain classes of signals. One important aspect of their implementation is the placement of reference levels in the converter. The levels need to be appropriately located within the input dynamic range, in order to obtain samples efficiently. In this paper, we study optimization of the performance of such an LC ADC by providing several sequential algorithms that adaptively update the ADC reference levels. The accompanying performance analysis and simulation results show that as the signal length grows, the performance of the sequential algorithms asymptotically approaches that of the best choice that could only have been chosen in hindsight within a family of possible schemes.