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[Author] Tuchsanai PLOYSUWAN(1hit)

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  • Minimum Kullback-Leibler-Based Turbo Multiuser Detector over Decomposition CDMA Signal

    Tuchsanai PLOYSUWAN  Sawat TANTIPHANWADI  Prasit TEEKAPUT  

     
    PAPER-DS-CDMA

      Vol:
    E91-A No:10
      Page(s):
    2963-2972

    In this paper, we develop a new iterative turbo multiuser detector for direct sequence code-division multiple access (DS-CDMA) systems over unknown frequency-selective channels by decomposing the observation signal into a number of signal components. Virtual trellis model representing the ISI channel for each separating signal user is designed to generate extrinsic probability in term of BCJR algorithm for exchange with a single channel decoder as priori information. Minimum kullback-leibler (MKL) framework is derived to calculate numerical channel estimation and extrinsic probability. In comparison with other similar receiver, simulation results demonstrate that the proposed solution achieves the desirable performance.