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Timing mismatch compensation in TI-ADCS using Bayesian approach

Araghi, H ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1109/EUSIPCO.2015.7362612
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2015
  4. Abstract:
  5. A TI-ADC is a circuitry to achieve high sampling rates by passing the signal and its shifted versions through a number of parallel ADCs with lower sampling rates. When the time shifts between the C channels of a TI-ADC are properly tuned, the aggregate of the obtained samples is equivalent to that of a single ADC with C-times the sampling rate. However, the performance of a TI-ADC can be seriously degraded under interchannel timing mismatch. As this non-ideality cannot be avoided in practice, we need to first estimate the mismatch value, and then, compensate it. In this paper, by adopting a stochastic bandlimited signal model we study the signal recovery problem from the samples of a TI-ADC affected by timing mismatch and jitter. In particular, we derive the Bayesian model and implement the minimum mean square error (MMSE) estimator. The latter is achieved by means of Gibbs sampling technique
  6. Keywords:
  7. Bayesian modeling ; Bayesian networks ; Mean square error ; Signal processing ; Signal reconstruction ; Stochastic models ; Stochastic systems ; Band-limited signal ; Bayesian model ; Gibbs sampling ; Multi-channel samplings ; Timing mismatch ; Signal sampling
  8. Source: 2015 23rd European Signal Processing Conference, EUSIPCO 2015, 31 August 2015 through 4 September 2015 ; August , 2015 , Pages 1391-1395 ; 9780992862633 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7362612