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Blind Multi-user Detection for Multi-carrier CDMA Systems with Uniform Linear Arrays

  • Aifeng Ren
  • Qinye Yin
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4222)

Abstract

To mitigate the inter-chip and inter-symbol interferences (ISI), multi-carrier code-division multiple access (MC-CDMA) communication systems, which integrate the advantages of multi-carrier transmission systems with those of CDMA, are considered as promising techniques for future broadband wireless multimedia communications. In this paper, we focus on the uplink multi-user detection (MUD) on the scheme that a uniform linear array (ULA) is applied to the base station of the MC-CDMA system. We first describe the equivalent spatial-temporal channel model of multi-user multiple-input multiple-output (MIMO) MC-CDMA systems. Based on this scheme, by utilizing the finite alphabet property of transmitted symbols, an multi-user detector is derived for the MC-CDMA system with the ULA over frequency-selective fading channels. Computer simulations illustrate that our algorithm is more robust against noise and can well mitigate multiple access interference (MAI) in multi-user scenarios. In particular, the proposed scheme has the potential of providing the anticipated MUD performance gains with a complexity that would be manageable for MC-CDMA systems.

Keywords

Root Mean Square Error Orthogonal Frequency Division Multiplex Discrete Fourier Transform Finite Impulse Response CDMA System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Aifeng Ren
    • 1
    • 2
  • Qinye Yin
    • 1
  1. 1.School of Electronics and Information EngineeringXi’an Jiaotong UniversityXi’anP.R. China
  2. 2.School of Electronic and EngineeringXiDian UniversityXi’anP.R. China

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