Correction of mismatches in a time-interleaved analog-to-digital converter in an adaptively equalized digital communication receiver

  • Authors:

  • Tsung-Heng Tsai;Paul J. Hurst;Stephen H. Lewis

  • Affiliations:

  • National Chung Cheng University, Chiayi, Taiwan and Solid-State Circuits Research Laboratory, Department of Electrical and Computer Engineering, University of California, Davis, CA;Solid-State Circuits Research Laboratory, Department of Electrical and Computer Engineering, University of California, Davis, CA;Solid-State Circuits Research Laboratory, Department of Electrical and Computer Engineering, University of California, Davis, CA

  • Venue:
  • IEEE Transactions on Circuits and Systems Part I: Regular Papers
  • Year:
  • 2009

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Abstract

In this paper, techniques to overcome the errors caused by the offset, gain, sample-time, and bandwidth mismatches among time-interleaved analog-to-digital converters in a high-speed baseband digital communication receiver are presented. The errors introduced by these mismatches are corrected using least-mean-square adaptation implemented in digital-signal-processing blocks. Gain, sample-time, and bandwidth mismatches are corrected by modifying the operation of the adaptive receive equalizer itself to minimize the hardware overhead. Simulation results show that the gain, offset, sample-time, and bandwidth mismatches are sufficiently corrected for practical digital communication receivers.