ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Sliced Multi-modulus Blind Equalization Algorithm

  • Abrar, Shafayat (Electrical Engineering Department, COMSATS-IIT) ;
  • Axford, Roy A. Jr. (Space & Naval Warfare Systems Center, Signals Technology Branch)
  • Received : 2004.03.10
  • Published : 2005.06.30
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Abstract

Many multi-modulus blind equalization algorithms (MMA) have been presented in the past to overcome the undesirable high misadjustment exhibited by the well-known constant modulus algorithm. Some of these MMA schemes, specifically tailored for quadrature amplitude modulation (QAM) constellations, have also been proved to fix the phase offset error without needing any rotator at the end of the equalizer stage. In this paper, a new multi-modulus algorithm is presented for QAM signals. The contribution lies in the technique to incorporate the sliced symbols (outcomes of decision device) in the multi-modulus-based weight adaptation process. The convergence characteristics of the proposed sliced multi-modulus algorithm (S-MMA) is demonstrated by way of simulations, and it is shown that it gives better steady-state performance in terms of residual inter-symbol interference and symbol-error rate. It has also been shown that the proposed algorithm exhibits lesser steady-state misadjustment compared to the best reported MMA.

Keywords

References

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