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http://dx.doi.org/10.7236/JIIBC.2015.15.1.131

A Performance Evaluation of VSS-MMA Adaptive Equalization Algorithm using the Non-Linear Fuction of Error Signal for QAM System  

Lim, Seung-Gag (Dept. of Information and Communication, Kongju National University)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.15, no.1, 2015 , pp. 131-137 More about this Journal
Abstract
This paper relates with the VSS-MMA (Variable Step Size-Multiple Modulus Algorithm) adaptive equalization algorithm which is possible to improving the equalization performance by use the nonlinear fuction of error signal in the MMA adaptive equalization algorithm that are used for the minimization of the intersymbol interference due to the distortion which occurs in the time dispersive channel for the transmission of QAM signal in the system.. In the conventional MMA, we obtains the tap coefficient of adaptive equalizer using the fixed step size, but in the VSS-MMA, we obtains the tap coefficient of adaptive equalizer using the variable step size based on a nonlinear function of error signal. By adapting the variable step size, it was confirmed that the improved equalization performance were obtained by computer simulation. For this, the equalizer output signal constellation, residual isi, maximum distortion, MSE and SER were used in the performace index.
Keywords
MMA; VSS; residual isi; maximum distortion; dispersion constant;
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Times Cited By KSCI : 1  (Citation Analysis)
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