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Volume 30 Issue 2
Jan.  2011
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Dou Gao-qi, Gao Jun . Multiple Modulus Blind Equalization Algorithms for High-Order QAM System[J]. Journal of Electronics & Information Technology, 2008, 30(2): 388-391. doi: 10.3724/SP.J.1146.2006.01159
Citation: Dou Gao-qi, Gao Jun . Multiple Modulus Blind Equalization Algorithms for High-Order QAM System[J]. Journal of Electronics & Information Technology, 2008, 30(2): 388-391. doi: 10.3724/SP.J.1146.2006.01159

Multiple Modulus Blind Equalization Algorithms for High-Order QAM System

doi: 10.3724/SP.J.1146.2006.01159
  • Received Date: 2006-08-07
  • Rev Recd Date: 2006-12-14
  • Publish Date: 2008-02-19
  • In this paper, two multiple modulus algorithms(MMA+SDD and SMMA+SDD) are proposed based on the characteristic of the QAM signals, which overcome CMAs larger residual error and recover the rotation of the phase at the same time. Computer simulations show that the proposed algorithms lead to faster convergence rates and lower steady-state Mean Square Error(MSE) after convergence compared with the concurrent CMA and SDD algorithm. The MMA+SDD has the best performance and the SMMA+SDD has the least complexity among the three algorithms.
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  • Godard D. Self-recovering equalization and carrier trackingin two-dimensional data communication systems[J]. IEEETrans. on Commun., 1980, 28(11): 1867-1875.[2]Treichler J R. A new approach to multipath correction ofconstant modulus signals [J]. IEEE Trans. on ASSP, 1983,ASSP-31(2): 459-472.[3]De Castro F C C, De Castro M C F, and Arantes S S.Concurrent blind deconvolution for channel equalization[J].Proc ICC 2001, Finland.2001, vol.2:366-371[4]Chen S. Low complexity concurrent constant modulusalgorithm and soft decision-directed scheme for blindequalization [J].IEE Proc.Vis. Image Signal Processing.2003,150(5):312-320[5]Anfinsen S N, Herrmann F, and Nandi A K. Blind SingalEqualization, Blind Estimation Using High-order Statistics[M]. Kluwer, Boston, MA, USA, 1999: 27-101.[6]Weerackody V, Kassam S A, and Laker K R. A simplehard-limited adaptive algorithm for blind equalization[J].IEEE Trans. on Commun.1992, 39(7):482-487[7]郑应强, 李平, 张振仁. 用于MQAM 调制的双模式Sign-CMA 盲均衡算法[J].通信学报, 2004, 25(5): 155-159.Zheng Ying-qiang, Li Ping and Zhang Zhen-ren. Dual-modeblind equalization algorithm for multi-level QAM modulationbased on Sign-CMA[J]. Journal of China Institute ofCommunication, 2004, 25(5): 155-159.[8]Chen S, McLaughlin S, Grant P M, and Mulgrew B.Multi-stage blind clustering equalizer[J].IEEE Trans. onCommun.1995, 43(3):701-705
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