Browse > Article
http://dx.doi.org/10.7236/JIIBC.2018.18.4.85

A Performance Comparison of CR-MMA and CM-MMA Equalization Algorithm in 2-dimensional 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.18, no.4, 2018 , pp. 85-90 More about this Journal
Abstract
This paper compares the adaptive eualization performance of CR-MMA (Constellation Reduction-MMA) and CR-MMA (Constellation Matching-MMA) in order to minimization of intersymbol interference that is occur in channel for 2-dimensional QAM signal. For obtain the error signal in order to updating the tap coefficient of conventional adaptive equalization algorithm MMA, the CR-MMA converts the constellation reduction concept of high order 2-dimensional QAM nonconstant modulus signal to constant modulus signal and the CM-MMA use the constellation matchine error concept in order to force the matching the $2^{nd}$ and $4^{th}$ cumulant of equalizer output and transmitted signal constellation. By applying the different method for getting the error signal, these algorithm are possible to obtain the improved equalization performance compared to the conventional MMA algorithm, the improved performance of CR-MMA and CM-MMA were compared by computer simulation in this paper. As a result of simulation, the CM-MMA has more better performance in the equalizer internal performance than CR-MMA, but not in equalizer external performance as in SER.
Keywords
MMA; CR-MMA; CM-MMA; residual isi; maximum distortion;
Citations & Related Records
연도 인용수 순위
  • Reference
1 S. G. Lim, "Performance Improvement of MMA Adaptive Equalization Algorithm by using the Constellation Reduction in QAM Signal", Jour. on I.I.B.C., Vol.14, No.5, pp.103-109, Sep. 2014.
2 S. G. Lim, "The Performance Comparison of CR-CMA and CM-CMA Adaptive Equalization in 16-QAM Signal", Jour. on I.W.I.T., Vol. 11, No. 3, pp.115-120, June 2011.
3 Lin He, M. G. Amin, C. R. Jr, R. C. M alkemes, "A Hybrid Adaptive Blind Equalization Algorithm for QAM Signals in Wireless Communications", Vol. 52, No. 7, pp. 2058-2069, July 2004. DOI : 10.1109/TSP.2004.828913   DOI
4 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 : 10.1109/ICDSP.1997.627988   DOI
5 J. T. Yuan, K. D. Tsai, "Analysis of the Multi-modulus Blind Equalization Algorithm in QAM communication Systems", IEEE Trans. on Comm., Vol. 53, No. 9, pp.1427-1431, Sept. 2005. DOI : 10.1109/TCOM.2005.855017   DOI
6 W. Rao, "Amplitude Transformation-Based Blind Equalization Part 2 : Suitable for High-Order QAM Signal", Procedia Environmental Sciences 10, pp. 1282-1286, 2011.   DOI
7 Lin He, S. A. Kassam, "Convergence Analysis of Blind Equalization Algorithm using Constellation-Matching", IEEE Trans. on Com., Vol. 56, No. 11, pp.1765-1768, Nov. 2008. DOI : 10.1109/TCOM.2008.060370   DOI