Performance of MC-DS-CDMA System in Rayleigh Fading Channel with Non-coherent Combining Schemes and MAI Interference

  • Ismahene Ikhlef
  • Abdellatif Said
  • Faouzi Soltani
  • Faouzi Bader
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 45)


In this paper, we analyzed the multi – carrier direct sequence code division multiple access system when the received signal is divided into predetermined spreading sequences, and the sub - bands are modulated over M carriers. Because of the unknown phase of the received signal at each sub-band the receiver cannot coherently combine the outputs of the correlators. We consider in this paper non-coherent combining scheme (equal gain combining) with MAI interferences. The calculation of the probabilities of detection and false alarm for both multicarrier (MC) and single carrier (SC) system in a Rayleigh fading channel demonstrated that the performances of the multicarrier system are better than those with single carrier system. Obtained results demonstrated that the suppression (or the mitigation) of appeared interferences is obtained by the increase of the number of system carriers.


CDMA multi-carrier DS-CDMA equal gain combining non- coherent combing scheme 


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Copyright information

© ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering 2010

Authors and Affiliations

  • Ismahene Ikhlef
    • 1
  • Abdellatif Said
    • 2
  • Faouzi Soltani
    • 1
  • Faouzi Bader
    • 3
  1. 1.Faculty of Engineering, Department of ElectronicsUniversity of Constantine,(UoC)ConstantineAlgeria
  2. 2.UGRU- Math/ITUnited Arab Emirates (UAE) UniversityAl Ain;Abu DhabiUAE
  3. 3.Centre Technologic de Telecomunicacions de Catalunya-CTTC, PMTBarcelonaSpain

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