[1]李艳萍,吴 飞,郝青丽,等.基于动量因子的变步长盲多用户检测器[J].南京理工大学学报(自然科学版),2014,38(02):287-290.
　Li Yanping,Wu Fei,Hao Qingli,et al.Changeable step blind multi-user detector based on momentum factor[J].Journal of Nanjing University of Science and Technology,2014,38(02):287-290.
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基于动量因子的变步长盲多用户检测器
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《南京理工大学学报》（自然科学版）[ISSN:1005-9830/CN:32-1397/N]

卷:
38卷
期数:
2014年02期
页码:
287-290
栏目:
出版日期:
2014-04-30

文章信息/Info

Title:
Changeable step blind multi-user detector based on momentum factor
作者:
李艳萍1; 吴 飞1; 郝青丽2; 高忠宝1
1.太原理工大学 信息工程学院,山西 太原 030024; 2.南京理工大学 软化学与功能材料教育部重点实验室,江苏 南京 210094
Author(s):
Li Yanping1; Wu Fei1; Hao Qingli2; Gao Zhongbao1
1.College of Information Engineering,Taiyuan University of Technology,Taiyuan 030024,China; 2.Key Laboratory of Soft Chemistry and Functional Materials,Ministry of Education,NUST, Nanjing 210094,China
关键词:
信号与信息处理;  盲多用户检测;  多址干扰抑制;  变步长最小均方误差算法;  动量因子
Keywords:
signal and information processing;  blind multi-user detection;  multi-access interference suppression;  changeable step least mean square algorithm;  momentum factors
分类号:
TN911.23
摘要:
针对3种经典的盲多用户检测算法中,最小均方误差(LMS)算法收敛速度慢、而递归最小二乘算法(RLS)和Kalman自适应算法计算复杂度高的问题,该文提出了一种基于动量因子的变步长LMS算法。该算法在初始阶段使用较大的步长值,根据同一接收信号在相邻两次迭代过程中检测器的输出值之差来动态调整步长,加快了LMS算法的收敛速度。仿真结果表明,该算法的收敛和检测性能明显好于传统的LMS算法,稳态输出接近RLS算法和Kalman算法,而计算量仅略高于传统LMS算法,可以实时有效地抑制多址干扰。
Abstract:
For the three classical blind multiuser detection algorithms,the convergence rate of the least mean squares(LMS)is slower,and the recursive least squares(RLS)and the Kalman algorithm have higher computational complexity,a new changeable step algorithm based on the momentum factor is proposed.By using a larger step value in initial moment and dynamically adjusting step in iteration phases according to the detector output error of the same symbol received in two adjacent iteration processes,the algorithm has the better convergence performance.Simulation results show that the convergence performance of the improving algorithms is better than that of the classical LMS,the stable output performance is close to that of the RLS and Kalman,and the computational complexity is a little higher than that of the LMS.The method can instantaneously and effectively suppress the multiaccess interference.

参考文献/References:

[1] Du K L,Swamy M N S.An adaptive multiuser detection algorithm for CDMA systems using antenna diversity[J].Circuits Systems and Signal Processing,2010,29(6):1207-1222.
[2]Roy S.Subspace blind adaptive multiuser detection for CDMA[J].IEEE Transactions on Communication,2000,48(1):169-175.
[3]He H,Wu C C,Yang T,et al.Analysis of smart antenna interference suppression base on LMS improved algorithm[J].Key Engineering Materials,2011,474-476:1019-1023.
[4]Wang L H,He W,Zhou K H,et al.Adaptive channel equalization based on RLS algorithm[A].2011 International Conference on System Science,Engineering Design,and Manufacturing Informatization(ICSEM)[C].Guiyang,China:ICSEM,2011,2:105-108.
[5]Zhang Xianda,Wei Wei.Blind adaptive multiuser detection based on Kalman filtering[J].IEEE Transactions on Signal Processing,2002,50(1):87-95.

备注/Memo

备注/Memo:
收稿日期:2012-10-17 修回日期:2013-06-27
基金项目:国家自然科学基金(61271249)
作者简介:李艳萍(1963-),女,教授,硕士生导师,主要研究方向:多用户检测理论与应用,E-mail:liyanping@tyut.edu.cn。
引文格式:李艳萍,吴飞,郝青丽,等.基于动量因子的变步长盲多用户检测器[J].南京理工大学学报,2014,38(2):287-290.
投稿网址:http://njlgdxxb.paperonce.org
更新日期/Last Update: 2014-04-30