Performance analysis of an adaptive decision-feedback receiver in asynchronous CDMA systems

被引：0

作者：

Liu, Y ^{[1
]}

Wong, TF ^{[1
]}

机构：

[1] Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA

来源：

WCNC 2002: IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE RECORD, VOLS 1 & 2 | 2002年

关键词：

CDMA; decision-feedback receiver; performance analysis; random sequences; multiuser detection;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Recently, the performance of several linear multiuser receivers including the matched filter receiver, the decorrelator receiver, and the MMSE receiver has been analyzed in CDMA systems with random sequences. Little work has been done for nonlinear decision feedback receiver. In this paper, we extend the results for linear multiuser receivers to an asynchronous CDMA system with an adaptive decision-feedback detector (DFD). The performance of the DFD using both deterministic sequences and random sequences is analyzed. With the assumption of perfect feedback (i.e., the receiver always makes correct decisions), the feedback part of the adaptive DFD can suppress the interference due to the previous symbols of all users completely and correspondingly the user capacity of the whole system increases greatly when compared with a system using the MMSE receiver.

引用

页码：531 / 536

页数：4

共 9 条

[1] A FAMILY OF MULTIUSER DECISION-FEEDBACK DETECTORS FOR ASYNCHRONOUS CODE-DIVISION MULTIPLE-ACCESS CHANNELS [J].

DUELHALLEN, A .

IEEE TRANSACTIONS ON COMMUNICATIONS, 1995, 43 (2-4) :421-434

[2] On the average near-far resistance for MMSE detection of direct sequence CDMA signals with random spreading [J].

Madhow, U ;

Honig, ML .

IEEE TRANSACTIONS ON INFORMATION THEORY, 1999, 45 (06) :2039-2045

[3] ADAPTIVE RECEIVER STRUCTURES FOR ASYNCHRONOUS CDMA SYSTEMS [J].

RAPAJIC, PB ;

VUCETIC, BS .

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 1994, 12 (04) :685-697

[4] Adaptive feedforward/feedback architectures for multiuser detection in high data rate wireless CDMA networks [J].

Smee, JE ;

Schwartz, SC .

IEEE TRANSACTIONS ON COMMUNICATIONS, 2000, 48 (06) :996-1011

[5] Linear multiuser receivers: Effective interference, effective bandwidth and user capacity [J].

Tse, DNC ;

Hanly, SV .

IEEE TRANSACTIONS ON INFORMATION THEORY, 1999, 45 (02) :641-657

[6] Effective interference and effective bandwidth of linear multiuser receivers in asynchronous CDMA systems [J].

Tse, K ;

Tse, DNC .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2000, 46 (04) :1426-1447

[7]

VARANASI MK, 1997, P AS C SIGN SYST COM, P1405

[8] Spectral efficiency of CDMA with random spreading [J].

Verdú, S ;

Shamai, S .

IEEE TRANSACTIONS ON INFORMATION THEORY, 1999, 45 (02) :622-640

[9]

Verdu S., 1998, MULTIUSER DETECTION

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