多算法加权融合的盲均衡算法

doi:10.13190/jbupt.200905.41.zhaoxq

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (5): 41-46.doi: 10.13190/jbupt.200905.41.zhaoxq

多算法加权融合的盲均衡算法

赵晓群;姚宇宏;徐锡涛

(同济大学电子与信息学院，上海 201804)

收稿日期:2009-03-11 修回日期:2009-08-29 出版日期:2009-10-28 发布日期:2009-10-28
通讯作者: 赵晓群

Blind Equalization Based on Weighted Fusion of Multi-Mode Algorithm

ZHAO Xiao-qun,YAO Yu-hong,XU Xi-tao

(College of Electronic and Information, Tongji University, Shanghai 201804, China)

Received:2009-03-11 Revised:2009-08-29 Online:2009-10-28 Published:2009-10-28

摘要/Abstract

摘要：

在研究了多种广泛使用的盲均衡算法的基础上，设计了一种对多种算法加权融合的新算法：
当均衡器的输出信号可靠性足够高时，用可获得高收敛精度的多模辅助算法(MAMA)进行均衡
；当均衡器的输出信号可靠性不够高时，用修正的常模算法(MCMA)、多模算法(MMA)和MAMA 三种算法的加权融合来均衡，且控制权重，使权重随迭代次数变化，提高了算法性能. 仿真结果证明，新算法性能稳定，在恶劣的水声信道中，可以在大约2?800次迭代后收敛，达到-35?dB左右的码间干扰(ISI).

关键词: 修正的常模算法, 多模算法, 多模辅助算法, 加权融合

Abstract:

On the study of several commonly used algorithms, a new weighted fusion of multi-mode blind algorithm is proposed: when the output signal of the equalizer is reliable, MMA-assisted modulus algorithm (MAMA) is used, otherwise modified constant modulus algorithm (MCMA), multimodulus algorithm (MMA) and MAMA are weighted and merged together. On the other hand, by controlling the weight of each algorithm and making it in direct proportion to the iteration number, the performance is evidently improves. Simulation proves that the new algorithm is stable, and could reach inter symbol interference (ISI) of -35?dB after about 2?800 iterations in the underwater environment.

Key words: modified constant modulus algorithm, multi-modulus algorithm, MMA-assisted modulus algorithm, weighted fusion algorithm

赵晓群;姚宇宏;徐锡涛. 多算法加权融合的盲均衡算法[J]. 北京邮电大学学报, 2009, 32(5): 41-46.

ZHAO Xiao-qun,YAO Yu-hong,XU Xi-tao. Blind Equalization Based on Weighted Fusion of Multi-Mode Algorithm[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2009, 32(5): 41-46.

参考文献

[1] Labat J, Macchi O, Laot C. Adaptive decision feedback equalization: can you skip the training period[J]. IEEE Trans on Comm, 1998, 46(7): 921-930.
[2] 王峰, 赵俊渭, 李桂娟, 等. 一种常数模与判决引导相结合的盲均衡算法研究[J]. 通信学报, 2002, 23(6): 105-109. Wang Feng, Zhao Junwei, Li Guijuan, et al. On blind equalization united by constant modulus and decision directed algorithm[J]. Journal on Communications, 2002, 23(6): 105-109.
[3] Litwin L R, Zoltowski M D, Enders T J, et al. Blended CMA: smooth, adaptive transfer from CMA to DD-LMS//IEEE WCNC 1999. New Orleans: , 1999: 797-800.
[4] Guo Yecai, Han Yingge, Zhou Qiaoxi, et al. Decision circle based dual-mode constant modulus blind equalization algorithm//The 8th International Conference on Signal Processing. Beijing: , 2006: 80-83.
[5] 郑应强, 李平, 张振仁. 用于MQMA调制的双模式Sign-CMA盲均衡算法. 通信学报, 2004, 25(5): 155-159. Zheng Yingqiang, Li Ping, Zhang Zhenren. Dual-mode blind equalization algorithm for multi-level QAM modulation based on sign-CMA[J]. Journal of Communications, 2004, 25(5): 155-159.
[6] Wee G L. New soft transition dual mode type algorithms for blind equalization//IEEE WCNC 2007. Hong Kong: , 2007: 504-508.
[7] Picchi G, Prati G. Blind equalization and carrier recovery using a "stop-and-go" decision-directed algorithm[J]. IEEE Trans on Comm, 1987, 35(9): 877-887.
[8] Tseng C H, Lin C B. A stop-and-go dual-mode algorithm for blind equalization//GLOBECOM'96. London: , 1996: 1427-1431.
[9] 徐金标, 葛建华, 王育民. 基于CMA算法的双模式盲均衡算法[J]. 通信学报, 1997, 18(2): 65-69. Xu Jinbiao, Ge Jianhua, Wang Yumin. Dual mode algorithms for blind equalization based on CMA[J]. Journal of Communications, 1997, 18(2): 65-69.
[10] Guo Yecai, Yin Zhixiang, Guo Yi. Blind equalization of underwater acoustic channel using a novel double mode constant modulus algorithm//Proceeding of the Fourth International Conference on Machine and Cybernetics. Guangzhou: , 2005: 688-692.
[11] Rao Wei, Duan Hong, Guo Yecai. A new blind equalization algorithm//IEEE ICCT'06. Guilin: , 2006: 1-4.
[12] Guo Yecai, Han Yingge, Yang Chao. Orthogonal wavelet transform based sign decision dual-mode blind equalization algorithm//ICSP 2008. Beijing: , 2008: 80-83.
[13] 徐金标, 葛建华, 王新梅. 一种新的盲均衡算法[J]. 通信学报, 1995, 16(3): 78-81. Xu Jinbiao, Ge Jianhua, Wang Xinmei. A new blind equalization algorithm[J]. Journal on Communications, 1995, 16(3): 78-81.
[14] 欧阳喜, 葛临东. 一种新的基于数据可靠性判决引导的CMA盲均衡算法. 通信学报, 2001, 22(5): 125-128. Ouyang Xi, Ge Lindong. A new CMA blind equalization algorithm based on the decision-directed of data reliability[J]. Journal of Communications, 2001, 22(5): 125-128.
[15] Sun Lanqing, Ge Lindong, Liu Feng. A new dual-mode blind equalization based on estimated error variance//CAIDCD'06. Hangzhou: , 2006: 1-4.
[16] Godard D. Self-recovering equalization and carrier-tracking in two-dimensional data communication systems[J]. IEEE Trans on Comm, 1980, 28(11): 1867-1875.
[17] Lucky R W. Techniques for adaptive equalization of digital communication systems[J]. Bell Systems Technical Journal, 1966, 45(2): 255-286.
[18] Oh K N, Chin Y O. Modified constant modulus algorithm: blind equalization and carrier phase recovery algorithm//ICC '95. Seattle: , 1995: 498-502.
[19] Shahmohammadi M, Kahaei M H. A new dual-mode approach to blind equalization of QAM signals//ICSS 2003. Kemer-Antalya: , 2003: 277-281.
[20] Shalviv O, Weinstein E. New criteria for blind deconvolution of nonminimum phase systems (channels)[J]. IEEE Trans on Inform Theory, 1990, 36(2): 312-321.(上接第9页)
[3] Chakraborty S S. An ARQ scheme with packet combining[J]. IEEE Commun Letters, 1998, 2(7): 200-202.
[4] Huitema C. The case for packet level FEC//Proc of IFIP 5th International Workshop on Protocols for High Speed Networks. Sophia Antipolis: , 1996: 109-120.
[5] Rizzo L. Effective erasure codes for reliable computer communication protocols[J]. ACM Computer Communication Review, 1997, 27(2): 24-36.
[6] 吴军力, 侯晓林, 尹长川, 等. Nakagami衰落信道下AM-SR-ARQ系统的性能分析[J]. 北京邮电大学学报, 2004, 27(3): 108-112. Wu Junli, Hou Xiaolin, Yin Changchuan, et al. Analysis on AM-SR-ARQ in Nakagami fading channels[J]. Journal of Beijing University of Posts and Telecommunications, 2004, 27(3): 108-112.

多算法加权融合的盲均衡算法

Blind Equalization Based on Weighted Fusion of Multi-Mode Algorithm

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics

本文评价