Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Optimal Antenna Selection Scheme with Transmit Adaptive Array for Wideband CDMA Systems

  • Kim, Hak-Seong (School of Electronics Engineering, Soongsil University) ;
  • Kim, Sanhae (School of Electronics Engineering, Soongsil University) ;
  • Lee, Woncheol (School of Electronics Engineering, Soongsil University) ;
  • Yoan Shin (School of Electronics Engineering, Soongsil University)
  • Published : 2002.07.01
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Abstract

Transmit diversity schemes we an effective capacity improvement method for down link of wideband code division multiple access (W-CDMA) systems. In this paper, we propose to use transmit antenna subset selection scheme in conjunction with closed loop transmit adaptive array (TxAA). The proposed scheme selects N$\_$s/ optimum antennas among N$\_$${\gamma}$/(>N$\_$s/) transmit antennas in order to maximize diversity gain from selected antennas, and also reduces the cost of RE chains by employing two different types of RF modules fur the selected and the unselected antenna group, respectively. Computer simulation results show performance improvement by the proposed scheme over the conventional TxAA when considering up link control information feedback.

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