Performance of High-Altitude Platforms Cellular Communications using Hamming-Tapered Concentric Circular Arrays
Автор: Fahad Alraddady
Журнал: International Journal of Information Technology and Computer Science(IJITCS) @ijitcs
Статья в выпуске: 12 Vol. 6, 2014 года.
Бесплатный доступ
In this paper, the performance of cellular communications based on the ambitious technology of High-Altitude Platforms (HAPs) is discussed when using tapered concentric circular arrays. The coverage cell will be described and designed with an efficient beamforming technique where the Hamming window is proposed as a tapering function and applied to the uniform concentric circular arrays (UCCA) for sidelobe reduction. Based on establishing some mapping curves, this novel tapering window is optimized in its parameters to have the lowest possible sidelobe level that can be 45 dB below the main lobe level. The optimum weights of Hamming window are found to be function of the number of elements of the innermost ring and the number of rings in the array. The cell power pattern is also discussed where the out-of-cell radiation is greatly reduced which in turns reduces the co-channel interference and improves the Carrier-to-Interference Ratio (CIR).
High-Altitude Platforms, Tapered Beamforming, Concentric Circular Arrays
Короткий адрес: https://sciup.org/15012197
IDR: 15012197
Список литературы Performance of High-Altitude Platforms Cellular Communications using Hamming-Tapered Concentric Circular Arrays
- S. Karapantazis and F. Pavlidou, "Broadband communications via high-altitude platforms: a survey," IEEE Communications Surveys & Tutorials, vol. 7, pp. 2-31, 2005.
- A. Mohammed and Z. Yang, “Broadband Communications and Applications from High Altitude Platforms”, International Journal of Recent Trends in Engineering, Vol 1, No. 3, May 2009.
- A. Mohammed and T. Hult, Capacity Evaluation of a High Altitude Platform Diversity System Equipped with Compact MIMO Antennas”, ACEEE International Journal on Communication, Vol 1, No. 1, Jan 2010.
- S. C. Chan, and H. H. Chen, "Uniform Concentric Circular Arrays with Frequency-Invariant Characteristics—Theory, Design, Adaptive Beamforming and DOA Estimation", IEEE Transactions on Signal Processing, Vol. 55, No. 1, pp. 165-177, January 2007.
- Y. Albagory, M. Dessouky, H. Sharshar, “An Approach for Dolph-Chebyshev Uniform Concentric Circular Arrays,” Journal of Electromagnetic Waves and Applications, JEMWA, Vol.21, No.6, pp.781 –794, 2007.
- Y. Albagory, M. Dessouky, H. Sharshar, “Optimum Normalized-Gaussian Tapering Window for Side Lobe Reduction in Uniform Concentric Circular Arrays,” Progress In Electromagnetics Research, PIER 69, pp. 35 –46, 2007.
- Y. Albagory, M. Dessouky, H. Sharshar, " An Approach for Low Sidelobe Beamforming in Uniform Concentric Circular Arrays" International Journal of Wireless Personal Communications, vol. 43, no. 4, pp. 1363-1368, 2007, Springer.
- M Nofal, S Aljahdali, Y Albagory, “Tapered beamforming for concentric ring arrays” AEU-International Journal of Electronics and Communications 67 (1), 58-63, 2013.
- Y. Albagory, “A Novel Design of Arbitrary Shaped Cells for Efficient Coverage from High Altitude Platforms” Progress In Electromagnetics Research Letters, Vol. 1, 245-254, 2008.
- Moawad Dessouky, Hamdy Sharshar, Yasser Albagory “Improving The Cellular Coverage from A High Altitude Platform by Novel Tapered Beamforming Technique,” Journal of Electromagnetic Waves and Applications, JEMWA, Vol.21, No.13, pp. 1721 –1731, 2007.
- Mostafa Nofal, Yasser Albagory, Mohiy Hadhoud, Moawad Dessouky, “A Novel Cellular Structure for Stratospheric Platform Mobil Communications “, Proc. of the Nineteenth National Radio Science Conference, NRSC’2002, March 19-21, Faculty of Engineering, Alexandria University, Alexandria, EGYPT, 2002.
- MI Dessouky, HA Sharshar, YA Albagory, “Geometrical analysis of high altitude platforms cellular footprint”, Progress In Electromagnetics Research 67, 263-274, 2007.
- MI Dessouky, HA Sharshar, YA Albagory, “Design of high altitude platforms cellular communications”, Progress In Electromagnetics Research 67, 251-261, 2007.
- Mostafa Nofal, Yasser Albagory, Moawad Dessouky, Hamdy Sharshar, “Modeling and Investigating the Rotational Motion Effects of the High Altitude Platforms,” Twenty Second National Radio Science Conference (NRSC 2005) March 15-17, 2005 Cairo – Egypt.
- Sultan Aljahdali, Mostafa Nofal and Yasser Albagory, "Geometrical Correction for Cell Deployment in Stratospheric Cellular Systems", Progress In Electromagnetics Research C, Vol. 29, pp. 83-96, 2012.
