A combined antenna arrays and reverse-link synchronous DS-CDMA system over frequency-selective fading channels with power control error

  • Authors:

  • Yong-Seok Kim;Seung-Hoon Hwang;Hyo-Yol Park;Keum-Chan Whang

  • Affiliations:

  • Communication System Lab., School of Elec. and Electr. Eng., Yonsei Univ., Sinchon-dong, Seodaemun-gu, Seoul, Korea;Standardization and System Res. Grp., Mobile Communication Technol. Res. Lab., LG Electronics, Hogye-dong, Dongan-gu, Anyang-shi, Kyungki-do, Korea and School of Electronics and Computer Sciences, ...;Communication System Lab., School of Elec. and Electr. Eng., Yonsei Univ., Sinchon-dong, Seodaemun-gu, Seoul, Korea;Communication System Lab., School of Elec. and Electr. Eng., Yonsei Univ., Sinchon-dong, Seodaemun-gu, Seoul, Korea

  • Venue:
  • EURASIP Journal on Applied Signal Processing
  • Year:
  • 2004

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Abstract

An improved antenna array (AA) has been introduced, in which reverse-link synchronous transmission technique (RLSTT) is incorporated to effectively make better an estimation of covariance matrices at a beamformer-RAKE receiver. While RLSTT is effective in the first finger at the RAKE receiver in order to reject multiple-access interference (MAI), the beamformer estimates the desired user's complex weights, enhancing its signal and reducing cochannel interference (CCI) from the other directions. In this work, it is attempted to provide a comprehensive analysis of user capacity which reflects several important factors such as the shape of multipath intensity profile (MIP), the number of antennas, and power control error (PCE). Theoretical analysis, confirmed by the simulations, demonstrates that the orthogonality provided by employing RLSTT along with AA may make the DS-CDMA system insensitive to the PCE even with fewer numbers of antennas.