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[Keyword] cyclic prefix spreading code(1hit)

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  • Subband Adaptive Array for Multirate Multicode DS-CDMA Systems

    Xuan Nam TRAN  Tetsuki TANIGUCHI  Yoshio KARASAWA  

     
    PAPER

      Vol:
    E86-A No:7
      Page(s):
    1611-1618

    A novel scheme of subband adaptive array for multicode Direct Sequence Code Division Multiple Access (DS-CDMA) is proposed in this paper. The proposed scheme has a flexible configuration which allows basestation to be able to dynamically adapt to multirate transmission requests from subscribers. It is shown that the novel scheme can effectively suppress multiple access interferences (MAI) by appropriately forming main beam toward the desired user while pointing beampattern nulls toward MAI sources. Moreover, the combination of the subband adaptive array with the so-called cyclic prefix spreading code CDMA is also proposed to mitigate multipath fading and maximize diversity gain in multipath fading environment.