The Transactions of the Korean Institute of Electrical Engineers A (대한전기학회논문지:전력기술부문A)

The Korean Institute of Electrical Engineers (대한전기학회)
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Robust Blind Equalization Algorithms and Its Application to 8-VSB Receiver

강인한 자력복구 채널등화 알고리즘 및 8-VSB 수신시스템에의 응용

  • Published : 1999.08.01
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Abstract

We propose two new classes of robust blind equalization algorithms against abrupt changes of channel conditions, which we call a triple-mode algorithm(TMA) and an automatic switch-over algorithm(ASA). The conventional DMGSA exhibits slow convergence rates due to the incorrect equalizer tap-updating process under the severe channel conditions. In order to speed up the convergence process, the TMA operates in triple-mode that is based on the dual-mode of the DMGSA incorporated with the tap-updating control modes of the SGA as well as the MSGA. Without resorting to the decision region for selecting the operation mode in the TMA, the ASA automatically switches the blind mode to the smoother conventional decision-directed mode. The ASA uses the error functional that is the weighted sum of the Generalized Sato error and the decision-directed error, where the weights correspond to the channel conditions. Test results on 16-QAM and 8-VSB datas confirm that the TMA and the ASA perform well under the sudden changes of channel conditions.

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References

  1. IEEE Trans. Comm. v.COM-32 no.8 Blind equalizers A. Benveniste;M.Goursat
  2. IEEE Trans. Comm. v.COM-35 Self recovering equalization and carrier tracking in two-dimensional data communication system D. N. Godard
  3. IEEE Trans. Comm. v.COM-23 A method of self-recovering equalization for multilevel amplitude modulation system Y. Sato
  4. IEICE Trans. Fundamentals of Electronics Communications & Computer Sciences v.E80-A no.6 A single/multilevel modulus algorithm for blind equalization of QAM signals K. N. Oh
  5. IEEE Trans. Comm. v.COM-42 no.6 Dual-mode type algorithm for blind equalization V. Weerackody;S. A. Kassam
  6. IEEE Trans. Comm. v.COM-35 Blind equalization and carrier recovery using a stop and go decision-directed algorithm G. Picci;G. Prati
  7. ATSC standard A/54 Guide to the Use of the ATSC Digital Television Standard
  8. IEEE Trans. Consumer Electronics v.39 no.3 Adaptive blind equalization coupled with carrier recovery for HDTV modem Y.S. Choi;H. Hwang;D.I. Song
  9. IEICE Trans. Communications v.E80-8 no.1 Blind algorithm for decision feedback equalizer B. S. Seo;J. H. Lee;C. W. Lee
  10. '98년도 대한전기학회 하계학술대회 논문집 Joint 채널등화 알고리즘 개발 및 8-VSB HDTV 수신시스템에의 응용 박경도;황유모