Null-Steering Beamformer Using Bat Algorithm
Keywords:
Array pattern synthesis, bat algorithm, beamformer, beamforming, interference suppression, null-steering, ULA antennasAbstract
This paper proposes an adaptive null-steering beamformer based on Bat Algorithm (BA) for Uniform Linear Array (ULA) antennas to suppress the interference. The beamformer is targeted at steering nulls of ULA pattern in the directions of the interferences. The amplitude-only nulling method has been utilized for adjusting excitation weight of each array element. In order to validate the proposal, several scenarios of ULA array pattern imposed with the prescribed nulls have been investigated and compared with those of accelerated particle optimization (APSO) and genetic algorithm (GA). The proposed beamformer has shown the ability to suppress sidelobes and to place precisely single, multiple, and broad nulls at arbitrary interference directions. Furthermore, the beamformer is much faster and more effective than APSO and GA-based ones.
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References
H. L. Van Trees, Optimum Array Processing: Part IV of Detection, Estimation, and Modulation Theory. chap. 1, pp. 1-12, John Wiley & Sons, 2002.
R. L. Haupt, Antenna Arrays: A Computational Approach. chap. 8, sec. 8.4, pp. 484-515, John Wiley & Sons, 2010.
H. Steyskal, R. A. Shore, and R. L. Haupt, “Methods for null control and their effects on the radiation pattern,” IEEE Trans. Antennas Propagat., vol. 34, pp. 404-409, 1986.
K. Guney and A. Akdagli, “Null steering of linear antenna arrays using modified tabu search algorithm,” Progress In Electromagnetics Research, vol. 33, pp. 167-182, 2001.
D. Karaboga, K. Guney, and A. Akdagli, “Antenna array pattern nulling by controlling both the amplitude and the phase using modified touring ant colony optimisation algorithm,” Int. J. Electronics, vol. 91, pp. 241-251, 2004.
Y. Lu and B. K. Yeo, “Adaptive wide null steering for digital beamforming array with the complex coded genetic algorithm,” IEEE Int. Conf. Phased Array Systems and Technology, Dana Point CA, USA, pp. 557-560, 2000.
K. Guney and S. Basbug, “Interference suppression of linear antenna arrays by amplitude-only control using a bacterial foraging algorithm,” Progress In Electromagnetics Research, vol. 79, pp. 475-497, 2008.
D. I. Abu-Al-Nadi, T. H. Ismail, and M. J. Mismar, “Interference suppression by element position control of phased arrays using LM algorithm,” Int. J. Electron. Commun., vol. 60, pp. 151-158, 2006.
A. Akdagli, K. Guney, and D. Karaboga, “Pattern nulling of linear antenna arrays by controlling only the element positions with the use of improved touring ant colony optimization algorithm,” Journal of Electromagnetic Waves and Applications, vol. 16, pp. 1423-1441, 2002.
K. Guney and M. Onay, “Bees algorithm for null synthesizing of linear antenna arrays by controlling only the element positions,” Neural Network World, vol. 16, pp. 153-169, 2007.
R. A. Shore, “Nulling at symmetric pattern location with phase only weight control,” IEEE Trans. Antennas Propagat., vol. 32, pp. 530-533, 1984.
A. Akdagli and K. Guney, “Null steering of linear antenna arrays by phase perturbations using modified tabu search algorithm,” J. Communications Technology and Electronics, vol. 49, pp. 37- 42, 2004.
M. Mouhamadou, P. Vaudon, and M. Rammal, “Smart antenna array patterns synthesis: Null steering and multi-user beamforming by phase control,” Progress In Electromagnetics Research, vol. 60, pp. 95-106, 2006.
M. Mouhamadou, P. Armand, P. Vaudon, and M. Rammal, “Interference supression of the linear antenna arrays controlled by phase with use of SQP algorithm,” Progress In Electromagnetics Research, vol. 59, pp. 251-265, 2006.
N. Karaboga, K. Guney, and A. Akdagli, “Null steering of linear antenna arrays by using modified touring ant colony optimization algorithm,” Int. J. RF and Microwave Computer Aided Eng., vol. 12, pp. 375-383, 2002.
S. W. Yang, Y. B. Gan, and A. Y. Qing, “Antennaarray pattern nulling using a differential evolution algorithm,” Int. J. RF and Microwave Computer Aided Eng., vol. 14, pp. 57-63, 2004.
B. Babayigit, A. Akdagli, and K. Guney, “A clonal selection algorithm for null synthesizing of linear antenna arrays by amplitude control,” Journal of Electromagnetic Waves and Applications, vol. 20, pp. 1007-1020, 2006.
K. Guney and M. Onay, “Amplitude-only pattern nulling of linear antenna arrays with the use of bees algorithm,” Progress In Electromagnetics Research, vol. 70, pp. 21-36, 2007.
J. Jin, H. L. Wang, W. M. Zhu, and Y. Z. Liu, “Array patterns synthesizing using genetic algorithm,” Progress In Electromagnetics Research Symposium, Cambridge, USA, pp. 64-68, 2006.
D. W. Boeringer and D. H. Werner, “Particle swarm optimization versus genetic algorithms for phased array synthesis,” IEEE Trans. Antennas Propagat., vol. 52, pp. 771-779, 2004.
M. R. Khan and V. Tuzlukov, “Null steering beamforming for wireless communication system using genetic algorithm,” 2011 IEEE International Conference on Microwave Technology & Computational Electromagnetics, Beijing, pp. 289-292, 2011.
K. C. Lee and J. Y. Jhang, “Application of particle swarm algorithm to the optimization of unequally spaced antenna arrays,” Journal of Electromagnetic Waves and Applications, vol. 20, pp. 2001- 2012, 2006.
P. V. Florence and G. S. N. Raju, “Synthesis of linear antenna arrays using accelerated particle swarm optimization algorithm,” Int. J. Computer Applications, vol. 103, no. 3, pp. 43-49, 2014.
X. S. Yang, “A new metaheuristic Bat-inspired algorithm,” Studies in Computational Intelligence, vol. 284, pp. 65-74, 2010.
X. S. Yang, Nature-Inspired Optimization Algorithms. London: Elsevier, pp. 141-154, 2014.
Q. Yao and Y. Lu, “Efficient beamforming using bat algorithm,” 2016 IEEE MTT-S Int. Con. on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO), July 2016.
S. U. Khan, I. M. Qureshi, F. Zaman, and A. Naveed, “Null placement and side lobe suppression in failed array using symmetrical element failure technique and hybrid heuristic computation,” Progress In Electromagnetics Research B, vol. 52, pp. 65-184, 2013.
J. Litva and T. Kwok-Yeung Lo, Digital Beamforming in Wireless Communications. chap. 2-3, pp. 13-55, Artech House, 1996.
T. V. Luyen and T. V. B. Giang, “Proposal of beamformer hardware model for smart antennas,” in Proc. of The 2014 National Conference on Electronics, Communications and Information Technology, Nha Trang, pp. 190-193, Sep. 2014.
T. V. Luyen and T. V. B. Giang, “Design and implementation of FPGA based LMS adaptive beamformer for ULA antennas,” in Proc. of The Vietnam Japan Microwave 2015, Ho Chi Minh City, pp. 71-76, Aug. 2015.
T. V. Luyen and T. V. B. Giang, “Design of LMS based adaptive beamformer for ULA antennas,” VNU Journal of Science: Comp. Science & Com. Eng., vol. 32, no. 3, pp. 72-79, 2016.
C. L. Dolph, “A current distribution for broadside arrays which optimizes the relationship between beam width and side-lobe level,” Proc. IRE, vol. 34, pp. 335-348, June 1946.
