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Approximateml estimator for compensation of timing mismatch and jitter noise in Ti-ADCS

Araghi, H ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1109/EUSIPCO.2016.7760671
  3. Publisher: European Signal Processing Conference, EUSIPCO , 2016
  4. Abstract:
  5. Time-interleaved analog to digital converters (TI-ADC) offer high sampling rates by passing the input signal through C parallel low-rate ADCs. We can achieve C-times the sampling rate of a single ADC if all the shifts between the channels are identical. In practice, however, it is not possible to avoid mismatch among shifts. Besides, the samples are also subject to jitter noise. In this paper, we propose a blind method to mitigate the joint effects of sampling jitter and shift mismatch in the TI-ADC structure. We assume the input signal to be bandlimited and incorporate the jitter via a stochastic model. Next, we derive an approximate model based on a first-order Taylor series and use an iterative maximum likelihood estimator to reconstruct the uniform samples of the input signal. The simulation results show that with a slight increase in the mean square-error, we obtain a fast blind compensation algorithm
  6. Keywords:
  7. Bandlimited signals ; Digital signal processing ; Error compensation ; Iterative methods ; Jitter ; Maximum likelihood ; Maximum likelihood estimation ; Mean square error ; Signal processing ; Signal reconstruction ; Stochastic models ; Stochastic systems ; Timing circuits ; Band-limited signal ; First-order taylor series ; High sampling rates ; Jitter noise ; Maximum likelihood estimator ; Mismatch compensation ; Time-interleaved ADC ; Time-interleaved analog to digital converters ; Analog to digital conversion
  8. Source: European Signal Processing Conference, 28 August 2016 through 2 September 2016 ; Volume 2016-November , 2016 , Pages 2360-2364 ; 22195491 (ISSN) ; 9780992862657 (ISBN)
  9. URL: http://ieeexplore.ieee.org/document/7760671