AbstractsEngineering

Digital compensation of nonidealities in time-interleaved ADCs

by Anders Haponen




Institution: KTH Royal Institute of Technology
Department:
Year: 2014
Keywords: Engineering and Technology; Electrical Engineering, Electronic Engineering, Information Engineering; Other Electrical Engineering, Electronic Engineering, Information Engineering; Teknik och teknologier; Elektroteknik och elektronik; Annan elektroteknik och elektronik; Master of Science in Engineering - Electrical Engineering; Civilingenj├Ârsexamen - Elektroteknik; Master of Science - Systems, Control and Robotics; Teknologie masterexamen - Systemteknik och robotik
Record ID: 1363623
Full text PDF: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-165771


Abstract

Mismatches between the analog to digital converters (ADCs) in time-interleaved sampling causes spurious signals, limiting the performance of the architecture. This thesis introduces the most commonly modeled mismatches, analyses their e ects and reviews and evaluates state-of-the art compensation methods published in recent papers. A novel method for choosing calibration signal for non-blind compensation is suggested, and how it can be used for current blind compensation methods (relaxing input signal requirements). Application of some common compensation methods is demonstrated with simulated data as well as data captured by a development board with two time-interleaved ADCs sampling at a high rate. ; Skillnader mellan analog-till-digital-omvandlarna (AD-omvandlarna) vid tids-interleavad sampling orsakar falska signaler, vilket kan bergransa arkitekturens prestanda. Den har masteruppsatsen introducerar de skillnader som vanligtvis modelleras, analyserar dess e ekter och granskar och utvarderar de framsta metoderna i nyligen publicerade artiklar. En ny metod for val av kalibreringssignal till icke-blinda kompenseringsmetoder foreslas, och hur den kan anvandas for blinda kompenseringsmetoder (vilket mildrar kraven pa insignalen). Nagra kompenseringsmetoder tillampas pa simulerad data saval som data insamlad av ett utvecklingskort med tva tids-interleavade AD-omvandlare med hog sampelfrekvens.