Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Efficient Performance Enhancement Scheme for Adaptive Antenna Arrays in a Rayleigh Fading and Multicell Environments

  • Kim Kyung-Seok (School Electrical and Computer Eng., Chungbuk National University) ;
  • Ahn Bierng-Chearl (School Electrical and Computer Eng., Chungbuk National University) ;
  • Choi Ik-Gueu (School Electrical and Computer Eng., Chungbuk National University)
  • Published : 2005.06.01
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Abstract

In this paper, an efficient performance enhancement scheme for an adaptive antenna array under the flat and the frequency-selective Rayleigh fadings is proposed. The proposed signal enhancement scheme is the modified linear signal estimator which combines the rank N approximation by reducing noise eigenvalues(RANE) and Toeplitz matrix approximation(TMA) methods into the linear signal estimator. The proposed performance enhancement scheme is performed by not only reducing the noise component from the signal-plus-noise subspace using RANE but also having the theoretical property of noise-free signal using TMA. Consequently, the key idea of the proposed performance enhancement scheme is to greatly enhance the performance of an adaptive antenna array by removing all undesired noise effects from the post-correlation received signal. The proposed performance enhancement scheme applies at the Wiener maximal ratio combining(MRC) method which has been widely used as the conventional adaptive antenna array. It is shown through several simulation results that the performance of an adaptive antenna array using the proposed signal enhancement scheme is much superior to that of a system using the conventional method under several environments, i.e., a flat Rayleigh fading, a fast frequency-selective Rayleigh fading, a perfect/imperfect power control, a single cell, and a multicell.

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References

  1. B. Melis, G. Romano, 'UMTS W-CDMA: Evaluation of radio performance by means of link level simulations', IEEE Personal Commun., pp. 42-49, Jun. 2000
  2. R. Prasad, T. Ojanpera, 'An overview of CDMA evolution toward wideband CDMA', IEEE Commun. Surveys, vol. 1, no. 1, pp. 2-29, Fourth Quarter 1998
  3. J. S. Thompson, P. M. Grant, and B. Mulgrew, 'Smart antenna arrays for CDMA systems', IEEE Personal Commun., pp. 16-25, Oct. 1996
  4. P. H. Lehne, M. Pettersen, 'An overview of smart antenna technology for mobile communications systems', IEEE Commun. Surveys, vol. 2, no. 4, pp. 2-13, Fourth Quarter 1999
  5. M. Hunukumbure, M. Beach, and B. Allen, 'Downlink beam forming effects on the code orthogonality in UTRA-FDD systems', in Proc. PIMRC, vol. 1, pp. 310-314, Sep. 2002
  6. K. H. Chang, I. S. Sohn, and K. S. Chang, 'Chip-Level 2-D RAKE receiver with symbol-level searcher beamforming', in Proc. IEEE VTC'99, pp. 924928, Sep. 1999
  7. M. Nakamura, Y. Oishi, and Y. Asano, 'Adaptive array for wideband DS-CDMA with decision feedback channel estimation', in Proc. IEEE ICUPC '98, pp. 567-571, 1998
  8. G. V. Tsoulos, M. A. Beach, and S. C. Swales, 'Performance enhancement of DS-CDMA microcellular networks with adaptive antennas', in Proc. IEEE VTC'96, pp. 1086-1090, 1996
  9. H. Koga, M. Taromaru, 'A simple and fast converging algorithm for MMSE adaptive array antenna', IEICE Trans. Commun., E83-B, no. 8, pp. 1671-1677, Aug. 2000
  10. S. Haykin, Adaptive Filter Theory, Prentice-Hall, Elglewood Cliff, 1991
  11. S. J. Yu, J. H. Lee, 'The statistical performance of eigenspace-based adaptive array beamformers', IEEE Trans. on Antennas and Propagat., vol. 44, no. 5, pp. 665-671, May 1996 https://doi.org/10.1109/8.496252
  12. J. S. Thompson, P. M. Grant, and B. Mulgrew, 'Performance of antenna array receiver algorithms for CDMA', in Proc. IEEE GLOBECOM, vol. 1, pp. 570-574, Nov. 1996
  13. Y. G. Kang, H. R. Park, B. Y. Ahn, and K. J. Lee, 'The performance comparison of beamforming algorithms for CDMA system', in Proc. ITCCSCC, vol. 2, pp. 1505-1508, Jul. 1998
  14. K. S. Kim, S. R. Saunders, 'New adaptive beamforming algorithm employing forwardlbackward averaging and signal enhancement schemes', IEEE Commun. Letters, vol. 5, no. 3, pp. 98-100, Mar. 2001 https://doi.org/10.1109/4234.913152
  15. Y. Ephraim, H. L. Van Trees, 'A signal subspace approach for speech enhancement', in Proc. IEEE ICASSP, pp. 355-358, 1993
  16. Y. Ephraim, H. L. Van Trees, 'A signal subspace approach for speech enhancement', IEEE Trans. Signal Processing, vol. 3, no. 4, pp. 251-266, Jul. 1995
  17. F. Adachi, 'Theoretical analysis of DS-CDMA reverse link capacity with SIR-based transmit power control', IEICE Trans. Fundamentals, E79A, no. 12, pp. 2028-2034, Dec. 1996
  18. W. M. Tam, C. M. Lau, 'Analysis of power control and its imperfections in CDMA cellular systems', IEEE Trans. Veh. Technol., vol. 48, no. 5, pp. 1706-1717, Sep. 1999 https://doi.org/10.1109/25.790552
  19. A. F. Naguib, A. Paulraj, 'Performance of wireless CDMA with M-ary orthogonal modulation and cell site antenna arrays', IEEE J. Select. Areas Commun., vol. 14, no. 9, pp. 1770-1783, Dec. 1996 https://doi.org/10.1109/49.545700
  20. H. Liu, M. D. Zoltowski, 'Blind equalization in antenna array CDMA systems', IEEE Trans. Signal Processing, vol. 45, no. 1, pp. 161-171, Jan. 1997 https://doi.org/10.1109/78.552214
  21. D. P. Bertsekas, Constrained Optimization and Lagrange Multiplier Methods, Academic Press, New York, 1982
  22. J. A. Cadzow, 'Signal enhancement-composite property mapping algorithm', IEEE Trans. Acoust., Speech Signal Processing, vol. 36, pp. 49-62, Jan. 1988 https://doi.org/10.1109/29.1488
  23. D. M. Wilkes, M. H. Hayes, 'Iterated Toeplitz approximation of covariance matrices', in Proc. IEEE ICASSP'88, pp. 1663-1666, 1988
  24. J. G. Proakis, Digital Communications, McGraw-Hill, New York, 1989
  25. K. I. Kim, 'CDMA cellular engineering issues', IEEE Trans. Veh. Technol., vol. 42, no. 3, pp. 345-359, Aug. 1993 https://doi.org/10.1109/25.231887
  26. A. J. Viterbi, A. M. Viterbi, and E. Zehavi, 'Other-cell interference in cellular power-controlled CDMA', IEEE Trans. Commun., vol. 42, no. 2/3/4, pp. 1501-1504, Feb./Mar./Apr. 1994 https://doi.org/10.1109/TCOMM.1994.582830
  27. A. J. Viterbi, A. M. Viterbi, K. S., Gilhousen, and E. Zehavi, 'Soft handoff extends CDMA cell coverage and increases reverse link capacity', IEEE J. Select. Areas Commun., vol. 12, no. 8, pp. 1281-1288, Oct. 1994 https://doi.org/10.1109/49.329346
  28. F. L. T. Eklof, L. E. Pettersson, and J. G. J. Rantakokko, 'On broadband adaptive beam forming for tactical radio systems', in Proc. IEEE MIL-COM 2001, pp. 1253-1260, 2001