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DC Offset Mismatch Calibration for Time-Interleaved ADCs in High-Speed OFDM Receivers

  • Yulong Zheng
  • Zhiting Yan
  • Jun Ma
  • Guanghui He
Part of the Communications in Computer and Information Science book series (CCIS, volume 337)

Abstract

Zero Intermediate Frequency (zero-IF) receivers with two analog-to-digital converters (ADCs) in In-Phase and Quadrature (IQ) branches are widely used in emerging multi-Gigabit wireless Orthogonal Frequency Division Multiplexing (OFDM) systems. Because ordinary ADCs could not meet the demands of sampling rate in the system, two time-interleaved analog-to-digital converters (TI-ADCs) could be an attractive alternative for sampling speed improvement in the receiver. However, the mismatches among the parallel sub-ADCs can degrade the performance significantly without calibration. Targeting the DC offset mismatch of the TI-ADCs, this paper proposes calibration algorithm based on decorrelation least-mean-squares (LMS) and recursive-least-square (RLS) utilizing the comb-type pilots in OFDM frame, which could calibrate the two TI-ADCs in (IQ) branches simultaneously. The calibration algorithm has the property of fast convergence. Simulation results show that the BER performance is improved by the proposed algorithm.

Keywords

Multi-Gigabit time-interleaved ADC mismatch calibration parameter estimation orthogonal frequency division multiplexing (OFDM) 

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References

  1. 1.
    Singh, J., Sandeep, P., Madhow, U.: Multi-gigabit communication: the ADC bottleneck. In: Proc. 2009 IEEE International Conf. Ultra-Wideband, ICUWB (September 2009)Google Scholar
  2. 2.
    IEEE 802.15 WPAN High rate Alternative PHY Task Group 3c, http://www.ieee802.org/15/pub/TG3c.html
  3. 3.
    Oh, Y., Murmann, B.: System embedded ADC calibration for OFDM receivers. IEEE Trans. Circuits Syst.-I 53, 1693–1703 (2006)CrossRefGoogle Scholar
  4. 4.
    Sandeep, P., Seo, M., Madhow, U., Rodwell, M.: Joint mismatch and channel compensation for high-speed OFDM receivers with timeinterleaved ADCs. IEEE Trans. Communications 58, 2391–2401 (2010)CrossRefGoogle Scholar
  5. 5.
    Conroy, C.S.G., Cline, D.W., Gray, P.R.: An 8-b 85-MS/s parallel pipeline A/D converter in 1-μm CMOS. IEEE J. Solid-State Circuits 28(4), 447–454 (1993)CrossRefGoogle Scholar
  6. 6.
    Tsai, T.H., Hurst, P.J., Lewis, S.H.: Correction of mismatches in a time-interleaved analog-to-digital converter in an adaptively equalized digital communication receiver. IEEE Trans. Circuits Syst. I. Regular Papers 56(2), 307–319 (2009)CrossRefGoogle Scholar
  7. 7.
    IEEE 802.15 WPAN High rate Alternative PHY Task Group 3a, http://www.ieee802.org/15/pub/TG3a.html
  8. 8.
    Glentis, G.-O., Berberidis, K., Theodoridis, S.: Efficent least squares adaptive algorithms for FIR transversal filtering. IEEE Signal Processing Magazine 16, 13–41 (1999)CrossRefGoogle Scholar
  9. 9.
    Haykin, S.: Adaptive Fitler Theory, 4th edn. Prentice-Hall (2001)Google Scholar
  10. 10.
    Jin, X., He, G., Ma, J.: Offset Calibration for Time-Interleaved Analog-to-Digital Converters in OFDM Systems. In: Signal Processing Theory and Application, APSIPA ASC (2010)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Yulong Zheng
    • 1
  • Zhiting Yan
    • 1
  • Jun Ma
    • 1
  • Guanghui He
    • 1
  1. 1.School of MicroelectronicsShanghai Jiao Tong UniversityShanghaiChina

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