This tutorial is focused on optimizing the acquisition step while considering asynchronous analog signal conversion, the appropriate compression algorithm and its involved reconstruction step.
Among many innovative analog-to-digital conversion (ADC) architectures, this tutorial presents the level-crossing ADC. In this architecture, a sample is acquired only when the signal value reaches one of the given amplitude levels leading to an asynchronous sampling. When sampling happens non-uniformly, the conventional digital signal processing cannot be adopted directly. A reconstruction step is therefore needed in order to recover uniform samples. Besides, compression step can also be included to optimize power consumption or data storage. In this tutorial, both wavelet transform compression and interpolation compression are discussed. For those three stages of signal processing, simulations and results are provided.
Asma MAALEJ received her Engineer degree in Polytechnical Engineer in 2007 and her master degree in Electronic systems and communication networks in 2008 from Tunisia Polytechnic school, University of Carthage, Tunisia. In 2012, she obtained her PhD degree in Electronics and Telecommunications engineering in co-supervision between TELECOM ParisTech and SUP'COM Tunis. She is currently an Assistant Professor in Telecommunications at the National Engineering School of Tunis. Since 2008, she has been a member of GRESCOM research Laboratory at the Higher School of Communications of Tunis (SUP’COM). Her main researcher activities are focusing on mixed signal processing, circuits and systems.
Manel BEN-ROMDHANE received her Engineer degree in telecommunications from the Higher School of Communications of Tunis (SUP’COM) in 2004. In 2005, she received her master degree in telecommunications - speciality: Circuits & Systems for Telecommunications Networks from SUP’COM of the University of Carthage in Tunis-Tunisia, and her master degree in digital telecommunication systems from the Ecole Nationale Supérieure des Télécommunications de Paris (TELECOM ParisTech) and the Université de Pierre et Marie Curie in Paris (UPMC). In 2009, she obtained her PhD degree in Electronics and Telecommunications engineering in co-supervision between TELECOM Paris-Tech and SUP’COM. Her PhD is subscribed in a CMCU (Comité Mixte de Coopération Universitaire) project titled “Reconfigurable RF receiver for Software Defined Radio applications”. Since 2005, she has been a member of GRESCOM research Laboratory. In 2007, she joined the Institut Supérieur de Biotechnologie de Sfax, Tunisia, where she was Assistant. In 2009, she joined the Faculté des Sciences de Bizerte, Tunisia, as Assistant Professor. Since september 2014, she has joined SUP'COM. Her research activities are in the area of mixed signal, circuits and systems for radio communications and biomedical signal acquisition. She has authored more than 40 papers in international journals and proceedings of peer-reviewed international conferences.
Dominique DALLET is a Full Professor of digital electronic design at the engineer school Bordeaux INP, ENSEIRB-MATMECA. He received the Ph.D. degree in electrical engineering from the University of Bordeaux, Talence, France, in 1995. He was the Head of the Electronic Embedded System Department from 2010 to 2013. He is the Head of the Electronic Design group of the IMS Laboratory. Since 2015, he is the chairperson of the Technical Committee “Measurement of Electrical Quantities” – IMEKO TC4. Dr. Dominique Dallet is doing his research at the IMS Laboratory (Laboratoire de l’Intégration du Matériau au Système), University of Bordeaux, Bordeaux INP, CNRS UMR 5218. His research activities are mainly focused on data converter (A/D – D/A) modelling and testing, parameter estimation, digital signal processing implementation in different targets (ASIC, FPGA), electronic design for the digital enhancement of analog and mixed electronic circuits (ADC, DAC, PA). He has authored over 200 papers in international and national journals or in proceedings of peer-reviewed international conferences, book chapters, and patents. He received as co-author the Istaván Kollár Award for the Best Paper Presented at the IMEKO-TC4 2016 Symposium, entitled “Accurate sine-wave frequency estimation by means of an interpolated DTFT algorithm”.