JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Performance Improvement of SE-MMA Adaptive Equalization algorithm by Selective Updating
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Performance Improvement of SE-MMA Adaptive Equalization algorithm by Selective Updating
Lim, Seung-Gag;
  PDF(new window)
 Abstract
This paper proposes the SU-SE-MMA algorithm which applying the concept of selective updaing to the SE-MMA that is possible to reduce the intersymbol interference due to distortion occurred at the channel when transmit the nonconstant modulus 16-QAM signal. The SE-MMA emerged for the simplifying the computational operation from the current MMA adaptation algorithm, then it`s has the fast convergence speed and has a problem of increase the residual component in the steady state. The SU-SE-MMA performs the selectively tap updating when the distance of equalizer output and specified transmit signal point is greater than the given threshold value and tap updaing does not occurred in the small distance. By this selective updating process, it is possible to more reduction in the computational operation in the propose algorithm. The improved adaptive equalization performance of SU-SE-MMA like as the equalizer output signal constellation, residual isi, MD, SER were confirmed by computer simulation compared to SE-MMA. As a result of simulation, the AV-SE-MMA has better performance in output signal constellation, residual isi and MD compared to the SE-MMA, but it was confirmed that the AV-SE-MMA has similar in the SER performance that means the robustness to the noise.
 Keywords
SE-MMA;MMA;residual isi;selective updating;MD;dispersion constant;
 Language
Korean
 Cited by
 References
1.
S.A. Sheikh, P. Fan, "Joint Blind Equalization &Carrier Phase Recovery based on Adaptively Vary-ing Modulus Algorithm", Int. Multitopic Conf., IEEE INMIC 2005, pp.1-6, 2005.

2.
W.S. Yuan, L. Feng, "A Computationally Efficient Multi-Modulus Blind Equalization Algorithm", 2nd Int. Conf. on ICIME, pp.685-687, 2010

3.
K.Banovic, R.Lee et al., "Computationally-Efficient Method for Blind Adaptive Equalization", 48th Mid. West Symp. on Cir. & Sys., Vol.1, pp.341-344, 2005.

4.
G. Im, C. Park, H.Won, "A bind equalization with the sign algorithm for broadband access", IEEE Com. Letter, Vol. 5, No.2, Feb. 2001

5.
M. Ghosh, "A sign-error algorithm for blind equ-alization of real signals", ICASP, pp.3365-3368, May 1998.

6.
D. L. Duttweiler, "Adaptive filter performance with nonlinarities in the correlation multiplier", IEEE Tran. Acoust., Speech, Signal Processing, Vol.30, pp.578-586, Aug. 1982 crossref(new window)

7.
S.G. Lim, D.S. Kang, "Performance of SE-MMA Blind Adaptive Equalization Algorithm in QAM System", Journal of I.I.B.C., Vol.13, No.3, pp.63-69, June 2013.