Multiuser detection and turbo multiuser decoding for asynchronous multitone multiple access systems

Author

Tonello, Andrea M.

Author_Institution

Lucent Technol. Bell Labs., Whippany, NJ, USA

Volume

2

fYear

2002

fDate

2002

Firstpage

970

Abstract

We consider multicarrier multiple access architectures that are based on combining discrete multitone (DMT) or filtered multitone (FMT) modulation with multiplexing of tones across users. Communications are asynchronous, e.g., uplink cellular communications. Optimum multiuser detection is formulated for demodulation of multitone signals that experience time and frequency asynchronism and propagate through frequency selective fading channels. Channel coding is also considered and practical decoding based on iterative (turbo) multiuser detection and decoding is investigated. Simplified detection schemes are also devised.

Keywords

cellular radio; channel coding; demodulation; fading channels; iterative decoding; modulation coding; multi-access systems; multiplexing; multiuser detection; turbo codes; DMT; asynchronous communications; channel coding; discrete multitone modulation; fading channels; filtered multitone modulation; frequency asynchronism; frequency selective channels; iterative decoding; iterative detection; multicarrier multiple access architectures; multiplexing; multitone multiple access; multitone signal demodulation; multiuser decoding; multiuser detection; time asynchronism; turbo decoding; uplink cellular communications; Channel coding; Detectors; Digital modulation; Fading; Filters; Frequency; Iterative decoding; Multiuser detection; OFDM modulation; Prototypes;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th

ISSN

1090-3038

Print_ISBN

0-7803-7467-3

Type

conf

DOI

10.1109/VETECF.2002.1040745

Filename

1040745