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http://dx.doi.org/10.7236/JIIBC.2014.14.1.85

Performance Evaluation of VSDA Blind Equalization Algorithm for 16-QAM Signal  

Lim, Seung-Gag (Dept. of Information and Communication, Kongju National University)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.14, no.1, 2014 , pp. 85-91 More about this Journal
Abstract
This paper relates with the VSDA (Variable stepsize Square contour Decision directed Algorithm) adaptive equalization algorithm that is used for the minimization of the intersymbol interference due to the distortion which occurs in the time dispersive channel for the transmission of 16-QAM signal.. In the conventional SCA, it is possible to compensates the amplitude and phase in the received signal that are mixed with the intersymbol interference by the constellatin dependent constant by using the 2nd order statistics of the transmitted signal. But in the VSDA, it is possible to the increasing the equalization performance by adding the concept of distance adjusted approach for constellation matching and the cost function of decision directed. We compare the performance of VSDA and SCA algorithm by the computer simulation. For this, the equalizer output signal constellation, residual isi, maximum distortion and MSE were used in the performace index. As a result of computer simulation, the VSDA algorithm has better than the SCA in convergence speed, but it gives nearly same equalization performance in other index.
Keywords
SCA; VSDA; Residual isi; Maximum distortion; Consellation dependent constant;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 D.N.Godard, "Self-recovering Equalization and carrier tracking in two-dimensional data comm. system", IEEE Trans. on Comm., Vol. 28, pp.1867- 1875, Nov. 1980.   DOI
2 A.T.Sheikh, S.A.Sheikh, "Efficient Variants of Square Contour Algorithm for Blind Equalization of QAM Signal", World Academy of Science, Eng. and Technology, pp.200-208, 2009.
3 T.Thaiupathump, L.He, S.A.Kassam, "Square Contour Algorithm for Blind Eqaulizatin of QAM Signal", World Academy of Science Eng. and Technology, pp.200-208, 2009.
4 K.Banovic,E.A.Rahleem, M.A.S.Khalid, "A Novel Radius-Adjusted Approach for Blind Adaptive Equalization", IEEE S.P.Letters, Vol.13, No.1, pp.37-40, Jan. 2006.   DOI   ScienceOn
5 KH.Oh, "A Design of Error Signals Effective for Blind Equalization in Both of Initial Phase and Steady-State", Journal of K.I.I.T.,, Vol.10, No.6, pp.45-51, June 2012.
6 Lim S.G., "Performance of VSCA Adaptive Equalization Algorithm for 16-QAM Signal", Journal of I.I.B.C., Vol.13, No.4, pp.67-73, Aug. 2013.
7 S.U.H.Qureshi, "Adaptive Equalization", Proce. of the IEEE 73(9), pp.1349-1387, 1985.   DOI   ScienceOn