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Volume 28 Issue 6
Jun.  2006
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Chen Shao-hua, Xiang Jing-lin, Shi Jie. T/2 Fractionally-Spaced Complete Feedback Equalizer in Wireless Sparse Multi-path Channels[J]. Journal of Electronics & Information Technology, 2006, 28(6): 1082-1085.
Citation: Chen Shao-hua, Xiang Jing-lin, Shi Jie. T/2 Fractionally-Spaced Complete Feedback Equalizer in Wireless Sparse Multi-path Channels[J]. Journal of Electronics & Information Technology, 2006, 28(6): 1082-1085.

T/2 Fractionally-Spaced Complete Feedback Equalizer in Wireless Sparse Multi-path Channels

  • Received Date: 2004-10-18
  • Rev Recd Date: 2005-06-21
  • Publish Date: 2006-06-19
  • A T/2 fractionally-spaced sparse complete feedback equalizer scheme is proposed to avoid the performance deterioration caused by symbol timing error in the receiver, which is a generalized version of the previously proposed Complete Feedback Equalizer (CFE). The performance of the scheme is analyzed based on minimum mean square error (MMSE) criterion, and the MMSE performance is proved to be the same as that of the Decision Feedback Equalizer (DFE). The scheme also effectively exploits the sparseness of the multi-path channels with large delay spread and reduces the complexity of the equalizer with small performance degradation. Theoretical analysis and computer simulations over field measured wireless channel show that the scheme performs better than symbol-spaced CFE and T/2 fractionally-spaced DFE.
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  • Fevrier I J, Gelfand S B, et al.. Reduced complexity decision feedback equalization for multipath channels with large delay spreads [J].IEEE Trans. on Commun.1999, 47 (6):927-[2]Kocic M, Brady D, et al..Sparse equalization for real-time digital underwater acoustic communications[C][J].Proc. Oceans95 MTS/IEEE, San Diego, California.1995, vol.3:1417-[3]Berberidis K, Rontogiannis T A, et al.. Efficient block implementation of the DFE [J].IEEE Signal Processing Lett.1998, 5(6):129-[4]Dhahir N A, Sayed A H, et al.. Stable pole-zero modeling of long FIR filters with application to the MMSE-DFE [J].IEEE Trans. on Commun.1997, 45 (5):508-[5]Rontogiannis A A, Berberidis K. Efficient decision feedback equalization for sparse wireless channels [J].IEEE Trans. on Wireless Commun.2003, 2 (3):570-[6]Ariyavistakul S, Greenstein L J. Reduced-complexity equaliza- tion techniques for broadband wireless channels [J].IEEE J. on Select. Areas Commun.1997, 15 (1):5-[7]Ungerboeck G. Fractionally tap-spacing equalizer and consequen-ces for clock recovery in data modems [J].IEEE Trans. on Commun.1976, 24 (8):856-[8]Proakis J G. Digital Communications [M]. Beijing: Publishing House of Electronics Industry, 2002, chap.10, 11.[9]Al-Dhahir.N, Cioffi J MFast computation of channel-estimate based equalizers in packet data transmission [J].. IEEE Trans. on Signal Processing.1995, 43 (11):2462-
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