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CDMA2000 시스템에서 파일럿 채널을 이용한 스마트 안테나 시스템의 성능향상 연구

Research on Improving Performance Utilizing Pilot Channel of Smart Antenna System in CDMA2000 system

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초록

This paper suggests novel signal processing methods for optimal beamforming of smart antenna system in CDMA2000 mobile communication environments. This method utilize characteristics of the reverse pilot channel of CDMA2000 mobile communication systems, and applies them to improve the performance of an adaptive algorithm, which is used to a smart antenna system for beamforming. To perform the best beamforming, it is important to get an exact beamforming algorithm. This paper proposed an algorithm based on Laglange multiplier which has such an adaptive process, and also proposed the method to demodulate the received signal through array antenna using pilot channel in CDMA2000 environment. This paper analysed the enhanced performance of proposed algorithm in various signal environment through signal modeling of physical layer in CDMA2000 reverse link.

Abstract

This paper suggests novel signal processing methods for optimal beamforming of smart antenna system in CDMA2000 mobile communication environments. This method utilize characteristics of the reverse pilot channel of CDMA2000 mobile communication systems, and applies them to improve the performance of an adaptive algorithm, which is used to a smart antenna system for beamforming. To perform the best beamforming, it is important to get an exact beamforming algorithm. This paper proposed an algorithm based on Laglange multiplier which has such an adaptive process, and also proposed the method to demodulate the received signal through array antenna using pilot channel in CDMA2000 environment. This paper analysed the enhanced performance of proposed algorithm in various signal environment through signal modeling of physical layer in CDMA2000 reverse link.

참고문헌 (9)

  1. B. D. Van Veen, "Beamforming: A versatile approach to spatial filtering", IEEE ASSP Magazine (1988)
  2. A. J. Weiss, "Array shape calibration using sources in unknown locations - A maximum likelihood approach", IEEE Trans. Acoust. Speech and Signal Proc., ASSP-37(12) (1989)
  3. 3GPP2, "Physical layer standard for cdma2000 spread spectrum systems, Release A", ~ (1999)
  4. D. H. Jonson, "Improving the resolution of bearing in passive sonar arrays by eigenvalue analysis", IEEE Trans. Acoust., Speechm, Signal Processing,, ASSP-30, pp.638~647 (1982)
  5. M. Kaveh, "The statistical performance of the MUSIC and minimum-norm algorithms for resolving plane waves in noise", IEEE Trans. Acout,. Speech, Signal Processing, ASSP-34, pp.331~341 (1986)
  6. A. F. Naguib, "Adaptive Antennas for CDMA Wireless Networks", 박사, Department of Electrical Engineering, pp.1996
  7. S. Choi, "A novel adaptive beamforming algorithm for a smart antenna system in a CDMA mobile communication environment", IEEE Trans. Vehicular Technology, 49(5), pp.1793~1806 (2000)
  8. T. Shan, "Adaptive beamforming for coherent signals and interference", IEEE Trans. Acoust. Speech and Signal Proc., ASSP-33(3) (1982)
  9. T. K. Sarkar, "A limited survay of various conjugate gradient methods for solving complex matrix equations arising in electromagnetic wave interactions", Wave Motion, Elsevier Science Pub. B. B., pp.527~546 (1988)

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