PERFORMANCE ANALYSIS OF OPTIMAL CHANNEL ESTIMATION AND MULTIUSER DETECTION IN A RANDOMLY-SPREAD CDMA CHANNEL

被引：0

作者：

Keigo TAKEUCHI ^{[1
]}

Mikko VEHKAPER ^{[2
]}

Toshiyuki TANAKA ^{[3
]}

Ralf RMLLER ^{[2
]}

机构：

[1] Department of Information and Communication Engineering,University of Electro-Communications

[2] Department of Electronics and Telecommunications,Norwegian University of Science and Technology

[3] Department of Systems Science,Graduate School of Informatics,Kyoto University

来源：

JournalofSystemsScience&Complexity | 2010年 / 23卷 / 01期

关键词：

Channel estimation; code-division multiple-access (CDMA) systems; multiuser detection; replica method; spectral efficiency;

D O I：

暂无

中图分类号：

TN929.533 [码分多址（CDMA）移动通信];

学科分类号：

080402 ; 080904 ; 0810 ; 081001 ;

摘要：

<正> This paper analyzes performance of optimal channel estimation and multiuser detection(MUD) in a block-fading code-division multiple-access (CDMA) channel on the assumptions of randomspreading and large-system limit,by using the replica method developed in statistical mechanics.The authors find that the asymptotic spectral efficiency of the linear minimum mean-squared error(LMMSE) MUD which was proposed and analyzed by Evans and Tse in 2000 is indistinguishable fromthat of the optimal MUD for small system loads.Our results imply that performance of MUD scarcelyimproves even if one spends more computational cost than that of the LMMSE MUD,i.e.,at most thecube of the number of users,on the above-described conditions.

引用

页码：22 / 34

页数：13