Generalized multicarrier CDMA: Unification and linear equalization

Georgios B. Giannakis, Paul A. Anghel, Zhengdao Wang

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Relying on block-symbol spreading and judicious design of user codes, this paper builds on the generalized multkarrier (GMC) quasisynchronous CDMA system that is capable of multiuser interference (MUI) elimination and intersymbol interference (ISI) suppression with guaranteed symbol recovery, regardless of the wireless frequency-selective channels. GMC-CDMA affords an all-digital unifying framework, which encompasses single-carrier and several multicarrier (MC) CDMA systems. Besides the unifying framework, it is shown that GMC-CDMA offers flexibility both in full load (maximum number of users allowed by the available bandwidth) and in reduced load settings. A novel blind channel estimation algorithm is also derived. Analytical evaluation and simulations illustrate the superior error performance and flexibility of uncoded GMC-CDMA over competing MC-CDMA alternatives especially in the presence of uplink multipath channels.

Original languageEnglish (US)
Pages (from-to)743-756
Number of pages14
JournalEurasip Journal on Applied Signal Processing
Volume2005
Issue number5
DOIs
StatePublished - Apr 15 2005

Keywords

  • Blind equalization
  • Multicarrier CDMA
  • Multipath fading channels

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