The impact of combined channel mismatch effects in time-interleaved ADCs

@article{Vogel2005TheIO,
  title={The impact of combined channel mismatch effects in time-interleaved ADCs},
  author={Christian Vogel},
  journal={IEEE Transactions on Instrumentation and Measurement},
  year={2005},
  volume={54},
  pages={415-427}
}
  • Christian Vogel
  • Published 17 January 2005
  • Computer Science
  • IEEE Transactions on Instrumentation and Measurement
A time-interleaved multichannel analog-to-digital converter (ADC) achieves high sampling rates with the drawback of additional distortions caused by channel mismatches. In this paper, we consider the dependency of the signal-to-noise-and-distortion ratio (SINAD) on the combination of several different channel mismatch effects. By using either explicitly given mismatch parameters or given parameter distributions, we derive closed-form equations for calculating the explicit or the expected SINAD… 
Analysis and Correction of Combined Channel Mismatch Effects in Frequency-Interleaved ADCs
TLDR
An integrated channel mismatch compensation scheme is proposed that contrasts existing signal recovery approaches which calibrate specific types of errors separately and is compared with conventional solutions using extensive simulations.
Researches on Channel Mismatch Effects in Time-Interleaved ADC System
TLDR
The result of this paper has provided a theoretical basis for eliminating TIADC channel mismatch error and derived the formula of signal to noise and distortion ratio (SINAD) and spurious free dynamic range (SFDR).
Methodology for Minimizing Timing Mismatch in Time-Interleaved ADCs
TLDR
The systems signal-to-noise and distortion ratio (SINAD) and spurious-free dynamic range (SFDR) are increased by controlling the selection order of the channels ADCs in combination with oversampling and consecutive filtering.
Effect of Offset Mismatch in Time-Interleaved ADC Circuits on OFDM-BER Performance
TLDR
This paper analyzes the effect of the offset mismatch in time-interleaved analog-to-digital converter (TI-ADC) circuits on bit error rate (BER) performance of a receiver for pulse amplitude-modulated or quadrature amplitude- modulated signals in orthogonal frequency division multiplexed systems and shows that the tolerable level of theoffset mismatch is proportional to the square-root of the number of sub-ADCs.
Spectral shaping of timing mismatches in time-interleaved analog-to-digital converters
TLDR
A simple channel sorting algorithm is presented, which significantly improves the signal-to-noise and distortion ratio (SINAD) and the spurious free dynamic range (SFDR) by applying a simple low-pass filter.
Linear LMS compensation for timing mismatch in time-interleaved ADCs
TLDR
Simulation results show that the proposed compensation outperforms the other methods, in terms of the reconstruction error power, for a given fixed compensation order, except for signal having large zero regions in their power spectrum.
Time-interleaved analog-to-digital converters: status and future directions
TLDR
The principle possibilities of calibrating TI-ADCs are reviewed, where the necessities and advantages of digital enhancement are pointed out and open issues of channel mismatch identification as well as channel mismatch correction are discussed.
Linear LMS Compensation for Timing Mismatch in Time-Interleaved ADCs
TLDR
Simulation results show that a rough estimate of theinput spectrum can be used without much performance loss, showing that an accurate knowledge of the input spectrum is not necessarily required.
Impact of Time-interleaved Analog-to-Digital ConverterMismatch on Digital Receivers
TLDR
Simulation results present the performance degradation that can be expected by the usage of non-ideal analog-to-digital converters (ADC) sampling alternately the inphase and quadrature signals in a direct conversion receiver architecture when random data is processed.
...
...

References

SHOWING 1-10 OF 43 REFERENCES
Channel linearity mismatch effects in time-interleaved ADC systems
TLDR
This paper investigates the channel linearity mismatch effects in the time-interleaved ADC system, which are practically very important but have not been investigated yet, and considers two cases: differential nonlinearity mismatch and integral non Linearity mismatch cases.
Analysis of mismatch effects among A/D converters in a time-interleaved waveform digitizer
High-speed A/D conversion can be achieved by employing a parallel array of M A/D converters interleaved in time, each working at 1/Mth of the sampling rate. Theoretically, the resolution of the
SNR probability in time-interleaved ADCs with random channel mismatches
TLDR
This work is a deep study of the impact of random time skew, gain and offset mismatches on theSNR, and the SNR probability density function is determined as a function of both these errors and the number of channels.
New sampling method to improve the SFDR of time-interleaved ADCs
  • K. El-Sankary, A. Assi, M. Sawan
  • Computer Science
    Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03.
  • 2003
TLDR
This paper presents the mathematical background describing the effect of randomizing the samples among the interleaved ADCs and a digitally oriented method, based on this analysis, to randomize the mismatches among the ADC channels and shows the effectiveness of the proposed approach in multi-channel ADCs with arbitrary bit resolution and sampling rate.
Error analysis for time-interleaved analog channels
  • Baiying Yu, W. Black
  • Computer Science, Engineering
    ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196)
  • 2001
TLDR
The digital spectra due to mismatch between channels is derived by applying digital signal processing theories and the closed-forms of signal-to-noise ratio (SNR) are derived and verified using Matlab/sup TM.
Timing-mismatch analysis in high-speed analog front-end with nonuniformly holding output
TLDR
The analysis reveals first the relationship with traditional impulse-sampled timing-mismatch effects and then its closed-form expressions of the signal-to-noise-ratio (SNR), in terms of the number of channels, signal frequency, and jitter errors.
Blind estimation of timing errors in interleaved AD converters
  • J. Elbornsson, J. Eklund
  • Computer Science, Engineering
    2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221)
  • 2001
TLDR
Simulations of the time-interleaved A/D converter show that the method estimates the errors with high accuracy, and the estimation algorithm works without any special calibration signal, instead the normal input signal is used.
Reconstruction of nonuniformly sampled bandlimited signals by means of digital fractional delay filters
This paper considers the problem of reconstructing a class of nonuniformly sampled bandlimited signals of which a special case occurs in, e.g., time-interleaved analog-to-digital converter (ADC)
Digital offset compensation of time-interleaved ADC using random chopper sampling
  • J. Eklund, F. Gustafsson
  • Computer Science
    2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353)
  • 2000
An ADC using several parallel cells suffers from offset differences between the cells, which causes non-harmonic distortion. A method for removing the offset in the digital domain is proposed. The
Aperture jitter effects in wideband sampling systems
TLDR
The exact formula of the output noise power for almost any input signal in wideband sampling systems in the presence of aperture jitter is described and the timing skew problem in the interleaved ADC system is discussed.
...
...