LI Sen, WANG Yan, LIN Bin. Concurrent Blind Channel Equalization in Impulsive Noise Environments[J]. Chinese Journal of Electronics, 2013, 22(4): 741-746.
Citation: LI Sen, WANG Yan, LIN Bin. Concurrent Blind Channel Equalization in Impulsive Noise Environments[J]. Chinese Journal of Electronics, 2013, 22(4): 741-746.

Concurrent Blind Channel Equalization in Impulsive Noise Environments

Funds:  This work is supported in part by the National Natural Science Foundation of China (No.61171175, No.61001090) and the Fundamental Research Funds for the Central Universities (No.2011QN116).
More Information
  • Corresponding author: LI Sen, WANG Yan
  • Received Date: 2012-04-01
  • Rev Recd Date: 2012-11-01
  • Publish Date: 2013-09-25
  • In some communication systems the transmitted signal is contaminated by impulsive noise with a non-Gaussian distribution. Non-Gaussian noise caused significant performance degradation to communication receivers. The new constant modulus blind equalizer based on Fractional lower-order statistics of the equalizer input, which is defined as FLOS_CMA, is able to mitigate impulsive channel noise while restoring the constant modulus character of the transmitted communication signal. However, like the Constant modulus algorithm (CMA), the steady-state Mean square error (MSE) of the FLOS_CMA algorithm may not be sufficient low for the system to obtain adequate performance. This paper proposes a concurrent equalizer, in which a Decision-directed least mean p norm (DD_LMP) equalizer operates cooperatively with a FLOS_CMA equalizer, controlled through a non-linear link. Simulation results using M-QAM and 8-PSK signaling have shown that besides the capability of compensating the phase offset, the proposed concurrent FLOS_CMA and DD_LMP blind equalizer has faster convergence rate and lower steady-state MSE than the FLOS_CMA approach.
  • loading
  • O. Macchi, E. Eweda, “Convergence analysis of self-adaptivee qualizers”, IEEE Trans., Inf., Theory, Vol.3, No.2, pp.161-176, 1984.
    D. Castro, F.C.C. Astro, M.C.F. Arantes, “Concurrent blindd econvolution for channel equalization”, Proc. ICC'2001,Heisinki, Finland, Vol.2, pp.366-371, 2001.
    Zhensu Lu, Mingqiu Han, Tongfeng Zhang and Juan Du, “Improvedc oncurrent constant modulus algorithm and soft decisiond irected algorithm based on fractionally spaced equalization”,2 005 International Conference on Wireless Communications,Networking and Mobile Computing, Vol.1, pp.619-622, 2005.
    M. Hadef and S. Weiss, “Concurrent constant modulus algorithm and decision directed scheme for synchronous DS CDMAe qualization”, 2005 IEEE/S P13th Workshop on Statistical Signal Processing, pp.203-208, 2005.
    S. Chen and E.S. Chng, “Fractionally spaced blind equalizationw ith low-complexity concurrent constant modulus algorithm and soft decision directed scheme”, Int. J. Adaptive Control and Signal Processing, Vol.19, pp.471-484, 2005.
    S. Chen, B.L. Luk, C.J. Harris and L. Hanzo, “Blind equalization of high-order QAM channels using a fuzzy-logic tunedc onstant modulus algorithm and soft decision-directed scheme”,The 15th International Conference on Automation and Computing,L uton, UK, pp.143-148, 2009.
    X.W. Zhang and W. Rao, “New concurrent blind equalizationa lgorithm suitable for higher-order QAM signals”, Fifth International Conference on Fuzzy Systems and Knowledge Discovery,J inan, China, pp.177-181, 2008.
    B. Lin, R. He, X. Wang and B. Wang, “Excess MSE analysis of the concurrent constant modulus algorithm and soft decisiond irected scheme for blind equalization”, IET Signal Processing,Vol.2, No.2, pp.147-155, 2008.
    A. Mahmood, “PSK communication with passband additives ymmetric α-stable noise”, IEEE Transaction on Communications,Vol.60, No.10, pp.2990-3000, 2012.
    J. Lee. T.C, “Space-time coding over fading channels with stablen oise”, IEEE Transaction on Vehicular Technology, Vol.60,N o.7, pp.3169-3177, 2011.
    C.L. Nikas, M. Shao, Signal Peocessing with Alpha-Stable Distributions and Applications, Wiley, New York, 1995.
    M. Shao, C.L. Nikias, “Signal processing with fractional lowero rder moment stable processes and their applications”, Proceedings of the IEEE, Vol.81, No.7, pp.986-1010, 1993.
    A.T. Georgiadis, B. Mulgrew, “Adaptive Baysian decision feedbacke qualizer for alpha-stable noise environment”, Signal Processing,Vol.81, No.8, pp.1603-1623, 2001.
    V. Bhatia, B. Mulgrew and A.T. Georgiadis, “Stochastic gradienta lgorithms for equalization in α-stable noise”, Signal Processing,Vol.86, No.4, pp.835-845, 2006.
    M. Rupi, P. Tsakalides, E.D. Re, C.L. Nikias, “Constant modulusb lind equalization based on fractional lower-order statistics”,S ignal Processing, Vol.84, No.5, pp.881-894, 2004.
    H. Tang, T.S. Qiu and T. Li, “Capture properties of the generalized CMA in Alpha-stable noise environment”, Wireless Personal Communications, Vol.49, No.1, pp.107-122, 2009.
    S. Li, T.Sh. Qiu, Sh.F. Zhang, “Spacetime blind equalisation ini mpulsive noise”, IET Signal Processing, Vol.3, No.8, pp.445-458, 2009.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (273) PDF downloads(1001) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return