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Non-uniform sampling based on an adaptive level-crossing scheme

Malmirchegini, M ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1049/iet-spr.2014.0170
  3. Publisher: Institution of Engineering and Technology , 2015
  4. Abstract:
  5. Level-crossing (LC) analog-to-digital (A/D) converters can efficiently sample certain classes of signals. An LC A/D converter is a real-time asynchronous system, which encodes the information of an analog signal into a sequence of nonuniformly spaced time instants. In particular, this class of A/D converters uses an asynchronous data conversion approach, which is a power efficient technique. In this study, the authors propose adaptive and multi-level adaptive LC sampling models as alternatives to conventional LC schemes and apply an iterative algorithm to improve the reconstruction quality of LC A/D converters. This simulation results show that multi-level adaptive LC outperforms conventional A/D converters such as sigma-delta A/D converters in terms of performance and computational complexity
  6. Keywords:
  7. Algorithms ; Data handling ; Iterative methods ; Railroad crossings ; Adaptive level-crossing ; Analog to digital converters ; Asynchronous data ; Asynchronous system ; Iterative algorithm ; Nonuniform sampling ; Reconstruction quality ; Sigma-delta A/D converter ; Analog to digital conversion
  8. Source: IET Signal Processing ; Volume 9, Issue 6 , 2015 , Pages 484-490 ; 17519675 (ISSN)
  9. URL: http://ieeexplore.ieee.org/document/7175099