Performance Evaluation of 2×2 Switched Beam Antennas with Null Locating for Wireless Mesh Networks

Authors: S. Pradittara, M. Uthansakul, P. Uthansakul

Abstract:

A concept of switched beam antennas consisting of 2×2 rectangular array spaced by λ/4 accompanied with a null locating has been proposed in the previous work. In this letter, the performance evaluations of its prototype are presented. The benefits of using proposed system have been clearly measured in term of signal quality, throughput and delays. Also, the impact of position shift which mesh router is not located on the expected beam direction has also been investigated.

Keywords: Antenna array, Beamforming, Null steering, WMNs.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1073032

References:

[1] B.P. Crow, I. Widjaja, L.G. Kim, P.T. Sakai, "IEEE 802.11 Wireless Local Area Networks", Communications Magazine, IEEE , vol. 35 , 1997, pp.116-126.
[2] Ian F. Akyildiz, Xudong Wang, and Weilin Wang, "Wireless Mesh Networks: A Survey", Computer Networks and ISDN Systems , vol. 4, 2005.
[3] F. Babich, M. Comisso and L. Mania, Multi-Antenna Techniques for "Wireless Mesh Networks in an Outdoor Environment", Communications ICC '07 IEEE International Conference, 2007, pp. 4961-4966.
[4] S. P. Applebaum, "Adaptive Arrays", IEEE transaction on Antennas and Propagation, vol 24 , pp. 585-598.
[5] W.R. Li, C.Y. Chu, K.H. Lin, S.F. Chang, "Switched-Beam Antenna Based on Modified Butler Matrix with Low Sidelobe Level", Electronics Letters, vol 40, 2004, pp. 290-292.
[6] S. Pradittara, P. Uthansakul, R. Wongsan and M. Uthansakul, "Null Steering Network for Low Profile 2×2 Switch Beam Antenna", International Symposium on Antennas and Propagation, Thailand, 20-23 October 2009.
[7] B. Raman and K. Chebrolu. "Design and Evaluation of a New MAC for Long-Distance 802.11 Mesh Networks", In The 11th Intl. Conference on Mobile Computing and Networking (MOBICOM), Colongne, 2005.
[8] M. Uthansakul and P. Uthansakul, "Low Profile DOA Finder at 2.4 GHz", Microwave and Optical Technology Letter, to be published on January, 2009.
[9] H.M. Elkamchouchi, M.A.R.M. Adam, "A New Constrained Fast Null Steering Algorithm", Antennas and Propagation Society International Symposium IEEE, vol 2, 2000, pp. 926-929.
[10] H. Steyskal, R.A. Shore and R.L. Haupt, "Methods for Null Control and Their Effects on the Radiation Pattern", IEEE Trans. Antennas and Propagation, vol 34, 1986, pp. 404-409.
[11] J.A. Stine, "Exploiting smart antennas in wireless mesh networks using contention access", IEEE Wireless Communications, vol 13, 2006, pp. 38-49.
[12] V. Jain, A. Gupta, D.P. Agrawal, "On-Demand Medium Access in Multihop Wireless Networks with Multiple Beam Smart Antennas", IEEE Transactions on Parallel and Distributed Systems, vol 19, 2008, pp. 489 - 502.
[13] N. Sangmanee, P. Uthansakul, R. Wongsan, M. Uthansakul, "Finding capability enhancement for 360-degree DOA finder", ECTI-CON 2009, pp. 786 - 789.
[14] E. Boyer, A. Ferreol, P. Larzabal, "Simple robust bearing-range source's localization with curved wavefronts", IEEE Signal Processing Letters, vol 12, 2005, pp. 457 - 460.
[15] D. Astely, B. Ottersten, "The effects of local scattering on direction of arrival estimation with MUSIC", IEEE Transactions on Signal Processing, vol 47, 1999, pp. 3220 - 3234.