Group-orthogonal multi-carrier CDMA

Xiaodong Cai, Shengli Zhou, Georgios B. Giannakis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Code division multiple access (CDMA) over frequency- selective fading channels faces challenges in suppressing multiuser interference (MUI). but can also benefit from the channel-induced multipath. diversity. On the other hand, uncoded orthogonal frequency division multiple access (OFDMA) is MUI-free by design, but faces challenges arising from, the fading-induced loss of multipath diversity. In this paper, we wed the advantages of CDMA with those of OFDMA. We design a group-orthogonal multi-carrier CDMA (GO-MC- CDMA) schem.e that minimizes MUI subject to the constraint that the full multipath diversity is enabled for all users. Each group of GO-MC-CDMA users shares a properly selected set of system subcarriers. MUI only exists among users in the same small-size group, which renders application of low-complexity multi-user detection per group, practically feasible. Simulation results illustrate the merits of GO-MJD-CDMA over competing multi-access alternatives.

Original languageEnglish
Title of host publicationProceedings - IEEE Military Communications Conference MILCOM
Pages596-601
Number of pages6
Volume1
StatePublished - Dec 1 2002
Externally publishedYes
Event2002 MILCOM Proceedings; Global Information Grid - Enabling Transformation Through 21st Century Communications - Anaheim, CA, United States
Duration: Oct 7 2002Oct 10 2002

Other

Other2002 MILCOM Proceedings; Global Information Grid - Enabling Transformation Through 21st Century Communications
CountryUnited States
CityAnaheim, CA
Period10/7/0210/10/02

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Electrical and Electronic Engineering

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    Cai, X., Zhou, S., & Giannakis, G. B. (2002). Group-orthogonal multi-carrier CDMA. In Proceedings - IEEE Military Communications Conference MILCOM (Vol. 1, pp. 596-601)