[1]王鑫,栾晓明.改进的LMS-Rake接收机的性能[J].应用科技,2010,37(04):27-30.[doi:10.3969/j.issn.1009-671X.2010.04.007]
 WANG Xin,LUAN Xiao-ming.Performance of an improved LMSRake receiver[J].yykj,2010,37(04):27-30.[doi:10.3969/j.issn.1009-671X.2010.04.007]
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《应用科技》[ISSN:1009-671X/CN:23-1191/U]

卷:
第37卷
期数:
2010年04期
页码:
27-30
栏目:
现代电子技术
出版日期:
2010-04-25

文章信息/Info

Title:
Performance of an improved LMSRake receiver
文章编号:
1009-671X (2010) 04-0027-04
作者:
王鑫栾晓明
哈尔滨工程大学 信息与通信工程学院,黑龙江 哈尔滨 150001
Author(s):
WANG Xin LUAN Xiao-ming
College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
关键词:
Rake 接收机最大比合并最小均方误差准则LMS
Keywords:
Rake receiver maximal ration combining(MRC)minimum mean squar error(MMSE) least mean square (LMS)
分类号:
TN850.9
DOI:
10.3969/j.issn.1009-671X.2010.04.007
文献标志码:
A
摘要:
为了提高传统Rake接收机在无线通信系统中的性能,消除信号间的干扰和噪声,采用一种改进的基于最小均方误差(LMS)算法的Rake接收机,该结构针对传统的MRCRake接收机需通过增加分支数来提高性能,而MMSERake接收机需要进行矩阵的逆运算的不足,利用LMS算法进行权值计算并对步长进行了改进.经过理论分析和仿真结果表明,LMSRake接收机较传统的MRCRake接收机的性能有较大的提高,并且结构简单、运算复杂度低、易于实现.
Abstract:
This paper proposes an improved LMSRake receiver structure to enhance the performance and reduce the intersymbol interference and noise in the wireless communication system. This structure aims at the deficiencies that the traditional MRCRake receiver needs to increase the number of branches to improve performance, and the MMSERake receiver requires the matrix inverse operation. Through the LMS algorithm carried on the weight computation, the step computation also has an improvement. Theoretical analysis and computer simulations illustrate that the improved LMSRake receiver has significant improvement in performance when compared with the conventional MRCRake receiver. It has a simple structure, the calculation is not complicated and easy to implement.

参考文献/References:

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[2]BALTERSEE J, FOCK G. A novel multipath interference cancellation scheme for RAKE channel estimation [C]// IEEE Vehicular Technology Conference. Rhodes, Greece, 2001: 1493-1497.
[3]DUEL-Hallen A, HOLTZMAN J, ZVONAR Z. Multiuser detection for CDMA systems [J].IEEE Personal Communications, 1995,2(2):46-58.
[4]TRABELSI C, YONGACOGLU A. Biterrorrate performance for asynchronous DSCDMA over multipath fading channels [J]. IEE Proceeding of Communication, 1995, 5: 307-314.
[5]HONG S C, CHOI J, KIM S R. Constrained MMSErake receivers for DS/CDMA systems in multipath fading channels[C]// IEEE Vehicular Technology Conference. Birmingham,AL, USA, 2002: 533-536.
[6]LATVAAHO M, JUNTTI M J. LMMSE Detection for DSCDMA Systems in Fading Channels [J]. IEEE Trans on communication, 2000, 48(2): 194-199.
[7]ABOULNASR T,MAYYAS K. A robust variable step-size LMS algorithm: analysis and simulations[J]. IEEE Trans on Signal Processing,1997,45(3): 631-639.

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备注/Memo

备注/Memo:
收稿日期:2009-10-08. 作者简介:王鑫(1984-), 女,硕士研究生,主要研究方向:通信与信息系统,E-mail:wxwx0329@163.com.
更新日期/Last Update: 2010-05-05