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BER analysis of high-speed OFDM systems in the presence of time-interleaved analog-to-digital converter's offset mismatch

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Abstract
Time-interleaved analog-to-digital converters (TI-ADCs) are widely used for multi-Gigabit orthogonal frequency division multiplexing (OFDM) systems because of their attractive high sampling rate and high resolution. However, mismatch between the parallel sub-ADCs can severely degrade the system performance. Several types of mismatch can be distinguished, one particular kind of mismatch is offset mismatch, which originates from the different DC offsets in the different sub-ADCs. Although some authors have studied the effect of offset mismatch on the bit error rate (BER) performance, exact close-form BER expressions in the presence of offset mismatch have not been derived yet. In this poster, we derive such BER expressions. Gray-coded PAM or QAM signaling over an additive white Gaussian noise channel is considered. Our numerical results show that the obtained theoretical BER expressions are in excellent agreement with the simulated BER performance. We also investigate simplified expressions for the error floor occurring at large SNR and large offset mismatch. Our finding shows that this error floor is essentially independent of the modulation order and the type of modulation.
Keywords
Offset Mismatch, TI-ADC, OFDM

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MLA
Huynh, Vo Trung Dung, et al. “BER Analysis of High-Speed OFDM Systems in the Presence of Time-Interleaved Analog-to-Digital Converter’s Offset Mismatch.” BelgoVietnam Symposium, Abstracts, 2015.
APA
Huynh, V. T. D., Noels, N., & Steendam, H. (2015). BER analysis of high-speed OFDM systems in the presence of time-interleaved analog-to-digital converter’s offset mismatch. In BelgoVietnam Symposium, Abstracts. Ghent, Belgium.
Chicago author-date
Huynh, Vo Trung Dung, Nele Noels, and Heidi Steendam. 2015. “BER Analysis of High-Speed OFDM Systems in the Presence of Time-Interleaved Analog-to-Digital Converter’s Offset Mismatch.” In BelgoVietnam Symposium, Abstracts.
Chicago author-date (all authors)
Huynh, Vo Trung Dung, Nele Noels, and Heidi Steendam. 2015. “BER Analysis of High-Speed OFDM Systems in the Presence of Time-Interleaved Analog-to-Digital Converter’s Offset Mismatch.” In BelgoVietnam Symposium, Abstracts.
Vancouver
1.
Huynh VTD, Noels N, Steendam H. BER analysis of high-speed OFDM systems in the presence of time-interleaved analog-to-digital converter’s offset mismatch. In: BelgoVietnam Symposium, Abstracts. 2015.
IEEE
[1]
V. T. D. Huynh, N. Noels, and H. Steendam, “BER analysis of high-speed OFDM systems in the presence of time-interleaved analog-to-digital converter’s offset mismatch,” in BelgoVietnam Symposium, Abstracts, Ghent, Belgium, 2015.
@inproceedings{6979588,
  abstract     = {{Time-interleaved analog-to-digital converters (TI-ADCs) are widely used for multi-Gigabit orthogonal frequency division multiplexing (OFDM) systems because of their attractive high sampling rate and high resolution. However, mismatch between the parallel sub-ADCs can severely degrade the system performance. Several types of mismatch can be distinguished, one particular kind of mismatch is offset mismatch, which originates from the different DC offsets in the different sub-ADCs. Although some authors have studied the effect of offset mismatch on the bit error rate (BER) performance, exact close-form BER expressions in the presence of offset mismatch have not been derived yet.  In this poster, we derive such BER expressions. Gray-coded PAM or QAM signaling over an additive white Gaussian noise channel is considered. Our numerical results show that the obtained theoretical BER expressions are in excellent agreement with the simulated BER performance. We also investigate simplified expressions for the error floor occurring at large SNR and large offset mismatch. Our finding shows that this error floor is essentially independent of the modulation order and the type of modulation.}},
  author       = {{Huynh, Vo Trung Dung and Noels, Nele and Steendam, Heidi}},
  booktitle    = {{BelgoVietnam Symposium, Abstracts}},
  keywords     = {{Offset Mismatch,TI-ADC,OFDM}},
  language     = {{eng}},
  location     = {{Ghent, Belgium}},
  title        = {{BER analysis of high-speed OFDM systems in the presence of time-interleaved analog-to-digital converter's offset mismatch}},
  year         = {{2015}},
}