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http://dx.doi.org/10.7236/JIIBC.2021.21.1.55

A Performance Evaluation of QE-MMA Adaptive Equalization Algorithm based on Quantizer-bit Number and Stepsize  

Lim, Seung-Gag (Dept. of Information and Communication, Kongju National University)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.21, no.1, 2021 , pp. 55-60 More about this Journal
Abstract
This paper relates with the performance evaluation of QE-MMA (Quantized Error-MMA) adaptive equalization algorithm based on the stepsize and quantizer bit number in order to reduce the intersymbol interference due to nonlinear distortion occurred in the time dispersive channel. The QE-MMA was proposed using the power-of-two arithmetic for the H/W implementation easiness substitutes the multiplication and addition into the shift and addition in the tap coefficient updates process that modifies the SE-MMA which use the high-order statistics of transmitted signal and sign of error signal. But it has different adaptive equalization performance by the step size and quantizer bit number for obtain the sign of error in the generation of error signal in QE-MMA, and it was confirmed by computer simulation. As a simulation, it was confirmed that the convergence speed for reaching steady state depend on stepsize and the residual quantities after steady state depend on the quantizer bit number in the QE-MMA adaptive equalization algorithm performance.
Keywords
QE-MMA; power-of-two arithmetic; residual isi; maximum distortion; MSE;
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  • Reference
1 J. Yang, J. J. Weren, G. A. Dumont, "The Multi-modulus Blind Equalization Algorithm", 13th Int. Conf. D.S.P. Processing, pp. 127-130, 1997. DOI : https://doi.org/10.1109/ICDSP.1997.627988   DOI
2 W.S.Yuan, L.Feng, "A Computationally Efficient Multi-modulus Blind Equalization Algorithm", Int. Conf. on Information Management and Engineering, pp.685-687, 2010. DOI : https://doi.org/10.1109/ICIME.2010.5478261   DOI
3 Eweda E., "Convergence Analysis and Design of an Adaptive Filter with Finite-Bit Power-of-Two Quantized Error", IEEE Trans. on Circuit and Systems", Vol.39, No.2, pp.113-115, Feb. 1992. DOI : https://doi.org/10.1109/82.205815   DOI
4 V.Weerackody, S.A.Kassam, K.R.Laker, "A simple hard-limited adaptive algorithm for blind equalization", IEEE Trans. on Circuits and System 2, Vol.39, No.7, pp.482-487. July 1992. DOI : https://doi.org/10.1109/82.160173   DOI
5 K. Banovic, R. Lee, E.A.Raheem, M.A.S.Khalid, "Computationally-Efficient Method for Blind Adaptive Equalization", 48th Middlewest Symp. on Circuits and Systems, Vol.1. pp.341-344, 2005.
6 D.Brown, P.Schniter, J.C.R.Johnson, "Computationally Efficient Blind Equalization", Proc. Allerton Conf. on Communications, Control and Computing, Monticello, IL, pp.54-63, Oct. 1997.
7 Eweda E, "Comment on "Convergence Analysis and Design of an Adaptive Filter with Finite-Bit Power-of-Two Quantized Error"", Express Letters of IEEE Tran. on Circuit and Systems-2 : Analog and Digital Signal Processing, Vol.42, No.7, pp.498-500, July 1995.
8 S. G. Lim, "Performance of SE-MMA Blind Adaptive Equalization Algorithm in QAM System", Jour. on I.I.B.C., Vol.13, No.3, pp.63-69, June 2013.