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http://dx.doi.org/10.7236/JIIBC.2019.19.1.57

A Performance Evaluation of QE-MMA Adaptive Equalization Algorithm by Quantizer Bit Number  

Lim, Seung-Gag (Dept. of Information and Communication, Kongju National University)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.19, no.1, 2019 , pp. 57-62 More about this Journal
Abstract
This paper evaluates the QE-MMA (Quantized Error-MMA) adaptive equalization algorithm by the number of quantizer in order to compensates the intersymbol interference due to channel in the transmission of high spectral efficient nonconstant modulus signal. In the adaptive equalizer, the error signal is needed for the updating the tap coefficient, the QE-MMA uses the polarity of error signal and correlation multiplier that condered nonlinear finite bit power-of-two quantizing component in order to convinience of H/W implementation. The different adaptive equalization performance were obtained by the number of quantizer, these performance were evaluated by the computer simulation. For this, the equalizer output signal constellation, residual isi, maximum distortion, MSE, SER were applied as a performance index. As a result of computer simulation, it improved equalization performance and reduced equalization noise were obtained in the steady state by using large quantizer bit numbers, but gives slow in convergence speed for reaching steady state.
Keywords
QE-MMA; power-of-2 quantizer; correlation multiplier; nonconstant modulus; MSE;
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Times Cited By KSCI : 1  (Citation Analysis)
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