{"title":"Trajectory and Beamforming Vector Optimization for Multi-UAV Multicast Network","authors":"Chen Feng, Chao Zhang, Xinmin Luo","doi":"10.1109/WCSP.2019.8927982","DOIUrl":null,"url":null,"abstract":"In this paper, we consider a multiple unmanned aerial vehicles (UAVs)-enabled multicast network, where each UAV is employed to send common messages to its corresponding group users via beamforming technology. Due to the simultaneous information transmission, the users may also receive the interference signals from other UAVs. The objective of this paper is to maximize the sum time-averaged multicast rate by jointly optimizing multiple UAV trajectories and beamforming vectors. The optimization problem is non-convex and too complicated to be solved directly. In light of this, an iteration algorithm is applied, which alternately optimizes variables to decompose the coupling problem. Finally, the optimized UAV trajectory compared with the pre-defined circular trajectory is presented. Numerical results imply that the proposed optimization algorithm gains larger sum-multicast rate than the circular trajectory scheme and static scheme.","PeriodicalId":108635,"journal":{"name":"2019 11th International Conference on Wireless Communications and Signal Processing (WCSP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 11th International Conference on Wireless Communications and Signal Processing (WCSP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/WCSP.2019.8927982","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
In this paper, we consider a multiple unmanned aerial vehicles (UAVs)-enabled multicast network, where each UAV is employed to send common messages to its corresponding group users via beamforming technology. Due to the simultaneous information transmission, the users may also receive the interference signals from other UAVs. The objective of this paper is to maximize the sum time-averaged multicast rate by jointly optimizing multiple UAV trajectories and beamforming vectors. The optimization problem is non-convex and too complicated to be solved directly. In light of this, an iteration algorithm is applied, which alternately optimizes variables to decompose the coupling problem. Finally, the optimized UAV trajectory compared with the pre-defined circular trajectory is presented. Numerical results imply that the proposed optimization algorithm gains larger sum-multicast rate than the circular trajectory scheme and static scheme.