Qingqing Wu
National University of Singapore
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Publication
Featured researches published by Qingqing Wu.
IEEE Transactions on Wireless Communications | 2018
Qingqing Wu; Yong Zeng; Rui Zhang
Due to the high maneuverability, flexible deployment, and low cost, unmanned aerial vehicles (UAVs) have attracted significant interest recently in assisting wireless communication. This paper considers a multi-UAV enabled wireless communication system, where multiple UAV-mounted aerial base stations are employed to serve a group of users on the ground. To achieve fair performance among users, we maximize the minimum throughput over all ground users in the downlink communication by optimizing the multiuser communication scheduling and association jointly with the UAV’s trajectory and power control. The formulated problem is a mixed integer nonconvex optimization problem that is challenging to solve. As such, we propose an efficient iterative algorithm for solving it by applying the block coordinate descent and successive convex optimization techniques. Specifically, the user scheduling and association, UAV trajectory, and transmit power are alternately optimized in each iteration. In particular, for the nonconvex UAV trajectory and transmit power optimization problems, two approximate convex optimization problems are solved, respectively. We further show that the proposed algorithm is guaranteed to converge. To speed up the algorithm convergence and achieve good throughput, a low-complexity and systematic initialization scheme is also proposed for the UAV trajectory design based on the simple circular trajectory and the circle packing scheme. Extensive simulation results are provided to demonstrate the significant throughput gains of the proposed design as compared to other benchmark schemes.
IEEE Transactions on Vehicular Technology | 2018
Dingcheng Yang; Qingqing Wu; Yong Zeng; Rui Zhang
global communications conference | 2017
Qingqing Wu; Yong Zeng; Rui Zhang
global communications conference | 2017
Guangchi Zhang; Qingqing Wu; Miao Cui; Rui Zhang
IEEE Journal on Selected Areas in Communications | 2018
Qingqing Wu; Jie Xu; Rui Zhang
IEEE Transactions on Vehicular Technology | 2017
Guangchi Zhang; Jie Xu; Qingqing Wu; Miao Cui; Xueyi Li; Fan Lin
asia-pacific conference on communications | 2017
Qingqing Wu; Rui Zhang
international conference on communications | 2018
Qingqing Wu; Jie Xu; Rui Zhang
arXiv: Information Theory | 2018
Qingqing Wu; Jie Xu; Rui Zhang
arXiv: Information Theory | 2018
An Li; Qingqing Wu; Rui Zhang