Habib, MHKatzis, KMfupe, Luzango PEphrem, TB2022-08-222022-08-222022-07Habib, M., Katzis, K., Mfupe, L.P. & Ephrem, T. 2022. Performance optimization of high-altitude platform wireless communication network exploiting TVWS spectrums based on modified PSO. <i>IEEE Open Journal of Vehicular Technology, 1.</i> http://hdl.handle.net/10204/124782644-1330DOI 10.1109/OJVT.2022.3191762http://hdl.handle.net/10204/12478The Uniform hexagonal array (UHA) sidelobe level (SLL) reduction is a crucial consideration for avoiding co-channel interference and improving Carrier-to-interference Ratio (CIR) performance in HAP wireless networks using the TVWS spectrum. The SLL reduction in UHA has been researched by applying evolutionary algorithms such as genetic algorithm (GA) and Particle Swarm Optimization (PSO). However, such algorithms have the drawbacks such as early convergence and the inability to reach globally. The beam pointing approaches for UHA antennas using Modified PSO (MPSO), for reducing the SLL on finding the optimal current weights is presented in this article. The UHA antenna array with 19 cells fitted with 169 elements in the HAPs cellular structure is considered to simulate the proposed approach. Then, the MPSO approach is employed and compared with the standard PSO algorithm and Uniform Weighting (UW) scheme. As per the simulation findings, the proposed approach drastically decreased sidelobes, with a reduction of up to -6.84dB and -13.3dB when compared to PSO and UW respectively. In other words, the proposed approach outperforms the UW and the PSO algorithms. Moreover, the CIR performance of the proposed approach has been demonstrated in terms of average outage probability and the proposed approach provides a better result.FulltextenAntenna arrayArray factorBeam patternCarrier to interference ratioHigh altitude platformSidelobe levelTV White SpacesTVWSUniform hexagonal arrayArticleHabib, M., Katzis, K., Mfupe, L. P., & Ephrem, T. (2022). Performance optimization of high-altitude platform wireless communication network exploiting TVWS spectrums based on modified PSO. <i>IEEE Open Journal of Vehicular Technology, 1</i>, http://hdl.handle.net/10204/12478Habib, MH, K Katzis, Luzango P Mfupe, and TB Ephrem "Performance optimization of high-altitude platform wireless communication network exploiting TVWS spectrums based on modified PSO." <i>IEEE Open Journal of Vehicular Technology, 1</i> (2022) http://hdl.handle.net/10204/12478Habib M, Katzis K, Mfupe LP, Ephrem T. Performance optimization of high-altitude platform wireless communication network exploiting TVWS spectrums based on modified PSO. IEEE Open Journal of Vehicular Technology, 1. 2022; http://hdl.handle.net/10204/12478.TY - Article AU - Habib, MH AU - Katzis, K AU - Mfupe, Luzango P AU - Ephrem, TB AB - The Uniform hexagonal array (UHA) sidelobe level (SLL) reduction is a crucial consideration for avoiding co-channel interference and improving Carrier-to-interference Ratio (CIR) performance in HAP wireless networks using the TVWS spectrum. The SLL reduction in UHA has been researched by applying evolutionary algorithms such as genetic algorithm (GA) and Particle Swarm Optimization (PSO). However, such algorithms have the drawbacks such as early convergence and the inability to reach globally. The beam pointing approaches for UHA antennas using Modified PSO (MPSO), for reducing the SLL on finding the optimal current weights is presented in this article. The UHA antenna array with 19 cells fitted with 169 elements in the HAPs cellular structure is considered to simulate the proposed approach. Then, the MPSO approach is employed and compared with the standard PSO algorithm and Uniform Weighting (UW) scheme. As per the simulation findings, the proposed approach drastically decreased sidelobes, with a reduction of up to -6.84dB and -13.3dB when compared to PSO and UW respectively. In other words, the proposed approach outperforms the UW and the PSO algorithms. Moreover, the CIR performance of the proposed approach has been demonstrated in terms of average outage probability and the proposed approach provides a better result. DA - 2022-07 DB - ResearchSpace DP - CSIR J1 - IEEE Open Journal of Vehicular Technology, 1 KW - Antenna array KW - Array factor KW - Beam pattern KW - Carrier to interference ratio KW - High altitude platform KW - Sidelobe level KW - TV White Spaces KW - TVWS KW - Uniform hexagonal array LK - https://researchspace.csir.co.za PY - 2022 SM - 2644-1330 T1 - Performance optimization of high-altitude platform wireless communication network exploiting TVWS spectrums based on modified PSO TI - Performance optimization of high-altitude platform wireless communication network exploiting TVWS spectrums based on modified PSO UR - http://hdl.handle.net/10204/12478 ER -25917