Blind equalization of square-QAM signals: a multimodulus approach

  • Authors:
  • Shafayat Abrar;Asoke K. Nandi

  • Affiliations:
  • Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool, UK;Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool, UK

  • Venue:
  • IEEE Transactions on Communications
  • Year:
  • 2010

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Abstract

By generalizing and modifying some existing cost-functions, we present two new, generic and efficient multimodulus families of blind equalization algorithms for use in higher-order quadrature amplitude modulation based digital communication systems. Proposed algorithms are shown to be capable of blindly equalizing and recovering carrier-phase at convergence speed much faster than existing counterparts on certain QAM sizes. We show that particular examples of the proposed cost-functions include a number of existing algorithms. We also provide detailed dynamic convergence analysis which is found in good conformation with those obtained from Monte-Carlo experiments.