An efficient soft decision-directed algorithm for blind equalization of 4-QAM systems

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5 Citations (Scopus)

Abstract

This paper introduces an efficient soft decision-directed algorithm (SDDA) for blind equalization of 4 quadrature amplitude modulation (4-QAM) systems. A novel cost function (CF) based on the conventional SDDA is established to efficiently obtain the weight vector of the blind equalizer (BE). An appropriately modified Newton method (MNM) which is proposed in our previous work [9] is adopted to fast search the optimal equalizer weight vector. It is shown that the BE based on the novel MNM has an approximately quadratic order of convergence like Newton methods. Moreover, the proposed algorithm has better stability and much lower computational load than Newton methods.
Original languageEnglish
Title of host publicationProceedings of the IEEE International Symposium on Circuits and Systems (ISCAS), 22-25 May 2016, Montreal, Canada
PublisherIEEE
Pages1726-1729
Number of pages4
ISBN (Print)9781479953400
DOIs
Publication statusPublished - 2016
EventIEEE International Symposium on Circuits and Systems -
Duration: 22 May 2016 → …

Publication series

Name
ISSN (Print)0271-4310

Conference

ConferenceIEEE International Symposium on Circuits and Systems
Period22/05/16 → …

Keywords

  • Newton-Raphson method
  • algorithms
  • equalizers
  • stability

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