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

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


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.


Root Mean Square Error Orthogonal Frequency Division Multiplex Discrete Fourier Transform Finite Impulse Response CDMA System 
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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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