Analysis of slotted CDMA packet access based on non-linear multiuser detection

S. Sfar, K. B. Letaief, R. D. Murch

Research output: Contribution to journalConference article

2 Citations (Scopus)


In this paper, we assess the impact of layered space-time detection technique, known as V-BLAST, for multiuser detection over a packetized random access system based on CDMA and Slotted ALOHA. In this scheme, the multiple transmit antennas are treated as individual packet radio mobile stations, while the base station consists of multiple receive antennas. In addition, users are arranged in groups and allocated the same group signature sequence. The spreading technique is hence used to separate between the groups, and the layered space-time algorithm is then invoked to detect the signals from all users transmitting packets at the same time. A significant improvement in system throughput, delay and capacity are achieved.

Original languageEnglish
Pages (from-to)1238-1242
Number of pages5
JournalIEEE International Conference on Communications
Publication statusPublished - 1 Jan 2001
EventInternational Conference on Communications (ICC2001) - Helsinki, Finland
Duration: 11 Jun 200014 Jun 2000


ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this