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Efficient Bidirectional DFE for Doubly Selective Wireless Channels

Abstract

The bidirectional decision feedback equalizer (DFE) performs two equalizations, one on the received signal and one on its time-reversed version. In this paper, we apply the bidirectional DFE to wireless transmissions on rapidly time-varying dispersive channels and we propose an efficient implementation obtained by implementing the feedforward filter in the frequency domain. The feedback filter is adapted to the channel variations within one block and we propose a simplified design of the feedback filter coefficients based on a polynomial model of channel variations. Simulations performed on time-varying channels show that the proposed structure significantly outperforms existing architectures.

References

  1. 1.

    Tomasin S, Gorokhov A, Yang H, Linnartz J-P: Iterative interference cancellation and channel estimation for mobile OFDM. IEEE Transactions on Wireless Communications 2005, 4(1):238–245.

    Article  Google Scholar 

  2. 2.

    IEEE 802.16 Task Group e: Mobility https://doi.org/wirelessman.org/mobile/

  3. 3.

    Parker S, Sandell M, Yee MS, et al.: Space-time codes for future WLANs: principles, practice, and performance. IEEE Communications Magazine 2004, 42(12):96–103.

    Article  Google Scholar 

  4. 4.

    IEEE 802.20: Mobile Broadband Wireless Access (MBWA) https://doi.org/grouper.ieee.org/groups/802/20/

  5. 5.

    Liu H, Giannakis GB: Deterministic approaches for blind equalization of time-varying channels with antenna arrays. IEEE Transactions on Signal Processing 1998, 46(11):3003–3013. 10.1109/78.726813

    Article  Google Scholar 

  6. 6.

    Barhumi I, Leus G, Moonen M: Time-varying FIR equalization for doubly selective channels. IEEE Transactions on Wireless Communications 2005, 4(1):202–214.

    Article  Google Scholar 

  7. 7.

    Benvenuto N, Cherubini G: Algorithms for Communications Systems and Their Applications. John Wiley & Sons, Chichester, UK; 2002.

    Google Scholar 

  8. 8.

    Falconer D, Ariyavisitakul SL, Benyamin-Seeyar A, Eidson B: Frequency domain equalization for single-carrier broadband wireless systems. IEEE Communications Magazine 2002, 40(4):58–66. 10.1109/35.995852

    Article  Google Scholar 

  9. 9.

    Benvenuto N, Tomasin S: On the comparison between OFDM and single carrier modulation with a DFE using a frequency-domain feedforward filter. IEEE Transactions on Communications 2002, 50(6):947–955. 10.1109/TCOMM.2002.1010614

    Article  Google Scholar 

  10. 10.

    Benvenuto N, Tomasin S: Block iterative DFE for single carrier modulation. IEE Electronics Letters 2002, 38(19):1144–1145. 10.1049/el:20020767

    Article  Google Scholar 

  11. 11.

    Suzuki H: Performance of a new adaptive diversity-equalization for digital mobile radio. IEE Electronics Letters 1990, 26(10):626–627. 10.1049/el:19900410

    Article  Google Scholar 

  12. 12.

    Ariyavisitakul S: A decision feedback equalizer with time-reversal structure. IEEE Journal on Selected Areas in Communications 1992, 10(3):599–613. 10.1109/49.127782

    Article  Google Scholar 

  13. 13.

    Nelson JK, Singer AC, Madhow U, McGahey CS: BAD: bidirectional arbitrated decision-feedback equalization. IEEE Transactions on Communications 2005, 53(2):214–218. 10.1109/TCOMM.2004.841980

    Article  Google Scholar 

  14. 14.

    Balakrishnan J, Johnson CR Jr.: Time-reversal diversity in decision feedback equalization. Proceedings of Allerton Conference on Communication, Control and Computing, October 2000, Monticello, Ill, USA

    Google Scholar 

  15. 15.

    IEEE 802.16a-2003 : Part 16: Air Interface for Fixed Broadband Wireless Access Systems Amendment 2: Medium Access Control Modifications and Additional Physical Layer Specifications for 2 11 GHz. IEEE Standard Specifications, New York, NY, USA, April 2003

  16. 16.

    Jakes WC: Microwave Mobile Communications. IEEE Press, New York, NY, USA; 1994.

    Google Scholar 

  17. 17.

    Proakis JG: Digital Communications. McGraw-Hill, New York, NY, USA; 1994.

    Google Scholar 

  18. 18.

    Barhumi I, Leus G, Moonen M: Time-varying FIR decision feedback equalization of doubly-selective channels. Proceedings of IEEE Global Telecommunications Conference (GLOBECOM '03), December 2003, San Francisco, Calif, USA 4: 2263–2268.

    Article  Google Scholar 

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Correspondence to Stefano Tomasin.

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Tomasin, S. Efficient Bidirectional DFE for Doubly Selective Wireless Channels. EURASIP J. Adv. Signal Process. 2006, 070572 (2006). https://doi.org/10.1155/ASP/2006/70572

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Keywords

  • Information Technology
  • Frequency Domain
  • Receive Signal
  • Quantum Information
  • Wireless Channel