Near-optimal multiuser detection in synchronous CDMA using probabilistic data association

被引:165
作者
Luo, J [1 ]
Pattipati, KR [1 ]
Willett, PK [1 ]
Hasegawa, F [1 ]
机构
[1] Univ Connecticut, Dept Elect & Comp Engn, Storrs, CT 06269 USA
关键词
code division multiple access; multiuser detection; probabilistic data association;
D O I
10.1109/4234.951377
中图分类号
TN [电子技术、通信技术];
学科分类号
0809 [电子科学与技术];
摘要
A Probabilistic Data Association (PDA) method is proposed in this letter for multiuser detection over synchronous code-division multiple-access (CDMA) communication channels. PDA models the undecided user signals as binary random variables. By approximating the inter-user interference (IUI) as Gaussian noise with an appropriately elevated covariance matrix, the probability associated with each user signal is iteratively updated. Computer simulations show that the system usually converges within three to four iterations, and the resulting probability of error is very close to that of the optimal maximum-likelihood (ML) detector. Further modifications are also presented to significantly reduce the computational cost.
引用
收藏
页码:361 / 363
页数:3
相关论文
共 10 条
[1]
Bar-Shalom Yaakov., 1993, ESTIMATION TRACKING
[2]
DECORRELATING DECISION-FEEDBACK MULTIUSER DETECTOR FOR SYNCHRONOUS CODE-DIVISION MULTIPLE-ACCESS CHANNEL [J].
DUELHALLEN, A .
IEEE TRANSACTIONS ON COMMUNICATIONS, 1993, 41 (02) :285-290
[3]
UPDATING THE INVERSE OF A MATRIX [J].
HAGER, WW .
SIAM REVIEW, 1989, 31 (02) :221-239
[4]
LUO J, IN PRESS IEEE T COMM
[5]
LUO J, 2000, ICASSP2000 IST TURK
[6]
LINEAR MULTIUSER DETECTORS FOR SYNCHRONOUS CODE-DIVISION MULTIPLE-ACCESS CHANNELS [J].
LUPAS, R ;
VERDU, S .
IEEE TRANSACTIONS ON INFORMATION THEORY, 1989, 35 (01) :123-136
[7]
MA WK, QUASIMAXIMUM LIKELIH
[8]
Decision feedback multiuser detection: A systematic approach [J].
Varanasi, MK .
IEEE TRANSACTIONS ON INFORMATION THEORY, 1999, 45 (01) :219-240
[9]
GROUP DETECTION FOR SYNCHRONOUS GAUSSIAN CODE-DIVISION MULTIPLE-ACCESS CHANNELS [J].
VARANASI, MK .
IEEE TRANSACTIONS ON INFORMATION THEORY, 1995, 41 (04) :1083-1096
[10]
NEAR OPTIMUM DETECTION IN SYNCHRONOUS CODE-DIVISION MULTIPLE-ACCESS SYSTEMS [J].
VARANASI, MK ;
AAZHANG, B .
IEEE TRANSACTIONS ON COMMUNICATIONS, 1991, 39 (05) :725-736