volume | PIER Journals

Abstract

The performance of mobile cellular radio networks is limited by the level of cochannel interference that can be tolerated. The use of antennas arrays is very helpful in enhancing the performance and capacity of the wireless communication system. This paper presents a method for antenna pattern synthesis that suppress multiple interfering narrow or wide band signals while receiving the desired signal by controlling only the phase. Excitation phases are computed using the Sequential Quadratic Programming (SQP) technique. This method transforms the nonlinear minimization (or maximization) problem to a sequence of quadratic subproblems, based on a quadratic approximation of the Lagrangian function.

1. Braum, C., M. Nilson, and R. D. Murch, "Measurement of the interference rejection capability of smart antennas on mobile telephones," IEEE Vehicular Technology Conference, 1999. Google Scholar

2. Wells, M. C., "Increasing the capacity of GSM cellular radio using adaptive antennas," IEEE Proc., Vol. 143, No. 5, 1996. Google Scholar

3. Choi, S. and D. Shim, "A novel adaptive beamforming algorithm for a smart antenna system in a CDMA mobile communication environment," IEEE Transaction Vehicular Technology, Vol. 49, No. 5, 2000. Google Scholar

4. Stutzman, W. L. and G. A. Thiele, Antenna Theory and Design, John Wiley and Sons, 1981.

5. Winters, J. H., J. Salz, and R. D Gitlin, "The impact of antenna diversity on the capacity of wireless communication systems," IEEE Trans. Commun., Vol. 42, 1740-1751, 1994.
doi:10.1109/TCOMM.1994.582882 Google Scholar

6. Godara, L. C., "Application of antenna array to mobile communications, Part I: performance improvement, feasibility, and system considerations," Proceedings of the IEEE, Vol. 85, No. 7, 1029-1060, 1977. Google Scholar

7. Rudge, A. W., The Handbook of Antenna Design, Vol. 2, Vol. 2, 1983.

8. Boggs, P. T. and J. W. Tolle, "Sequential quadratic program- ming," Acta Numerica 1995, 1-51. Google Scholar

9. Stoer, J., "Foundations of recursive quadratic programming meth- ods for solving nonlinear programs," Computational Mathematical Programming, Vol. 15, 1985. Google Scholar

10. Spellucci, P., Numerische Verfahren der Nichtlinearen Opti- mierung, Birkh Ìˆauser, 1993.

11. Papalambros, P. Y. and D. J. Wilde, Principles of Optimal Design, Cambridge University Press, 1988.

12. Edgar, T. F. and D. M. Himmelblau, Optimization of Chemical Processes, McGraw Hill, 1988.

13. Schittkowski, K., "Nonlinear programming codes," Lecture Notes in Economics and Mathematical Systems, Vol. 183, 1980. Google Scholar

14. Steyskal, H., "Synthesis of antenna patterns with imposed near- field nulls," Electronics Letters, Vol. 30, No. 24, 2000-2001, 1994.
doi:10.1049/el:19941417 Google Scholar

15. Ng, B. P., M. H. Er, and C. Kot, "Linear array geometry synthesis with minimum sidelobe level and null control," IEE Proceedings — Microwaves, Vol. 141, No. 03, 162-166, 1994.
doi:10.1049/ip-map:19941032 Google Scholar

16. Vescovo, R., "Null synthesis by phase control for antenna arrays," Electronics Letters, Vol. 36, No. 33, 2000. Google Scholar

17. Abu-AL-Nadi, D. I., T. H. Ismail, and M. J. Mismar, "Interférence suppression by element position control of phased arrays using LM algorithm," Int. J. Electron. Commun., (AEü), 2005. Google Scholar

18. Ismail, T. H., D. I. Abu-AL-Nadi, and M. J. Mismar, "Phase- only control for antenna pattern synthesis of linear arrays using Levenberg-Marquart algorithm," Electromagnetics, Vol. 24, 555-564, 2004.
doi:10.1080/02726340490496707 Google Scholar

19. Baird, D. and G. Rassweiler, "Adaptive side lobe nulling using digitally controlled phase shifters," IEEE Trans. on Antennas and Propagation, Vol. 24, No. 5, 638-649, 1976.
doi:10.1109/TAP.1976.1141415 Google Scholar

20. Trastoy, A. and F. Ares, "Linear array pattern synthesis with minimum side lobe level and null control," John Wiley & Sons, Vol. 16, No. 5, 1997. Google Scholar

21. Karaboga, N., K. Guney, and A. Akdagli, "Null steering of linear antenna arrays with use of modified touring ant colony optimization algorithm," Wiley Periodicals, 375-383, 2002. Google Scholar

22. Shpak, D. J., "A method for the optimal pattern synthesis of linear arrays with prescribed nulls," IEEE Trans. on Antennas and Propagation, Vol. AP-44, 638-649, 1996. Google Scholar

23. Ismail, T. H., M. J. Mismar, and M. M. Dawoud, "Linear array pattern synthesis for wide band sector nulling," Progress In Electromagnetics Research, Vol. 21, 91-101, 1999. Google Scholar

24. Abu-Al-Nadi, D. I. and M. J. Mismar, "Genetically evolved phase-aggregation technique for linear arrays control," Progress In Electromagnetics Research, Vol. 43, 287-304, 2003. Google Scholar

25. Mismar, M. J. and T. H. Ismail, "Pattern nulling by iterative phase perturbation," Progress In Electromagnetics Research, Vol. 22, 181-195, 1999. Google Scholar

26. Güney, K. and A. Akdagli, "Null steering of linear antenna arrays using a modified tabu search algorithm," Progress In Electromagnetics Research, Vol. 33, 167-182, 2001. Google Scholar

Dr. Moctar Mouhamadou

Dr. Paul Armand

Prof. Patrick Vaudon

Prof. Mohammed Rammal