A unified approach to multiuser detectors for CDMA and their geometrical interpretations

Author

Jung, Peter ; Alexander, Paul D.

Author_Institution

Dept. of Electr. Eng., Kaiserslautern Univ., Germany

Volume

14

Issue

8

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

1595

Lastpage

1601

Abstract

In this paper, we align a class of known multiuser detectors for code-division multiple-access (CDMA) along with some new multiuser detectors in a unified group. The new multiuser detectors are devised by completing the structure of the group. The unified group structure is a binary tree obtained by splitting sequence and single symbol detection, maximum aposteriori (MAP) and maximum likelihood (ML) detection, and unconstrained as well as constrained detection. The link between sequence and single symbol estimators is explained revealing the increased complexity of single symbol estimators as compared to sequence estimators. Finally, the aforementioned group structure is supported by a geometrical technique depicting the detection process performed by the multiuser detectors

Keywords

code division multiple access; computational complexity; land mobile radio; maximum likelihood detection; maximum likelihood estimation; radio receivers; sequential estimation; trees (mathematics); CDMA; binary tree; complexity; detection process; geometrical interpretations; group structure; maximum aposteriori detection; maximum likelihood detection; multiuser detectors; sequence detection; sequence estimators; single symbol detection; unified approach; Binary trees; Detectors; Intersymbol interference; Land mobile radio; Maximum likelihood detection; Maximum likelihood estimation; Mobile communication; Multiaccess communication; Multiple access interference; Radio frequency;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.539413

Filename

539413