• Publications
  • Influence
Intelligent Reflecting Surface Enhanced Wireless Network via Joint Active and Passive Beamforming
  • Qingqing Wu, Rui Zhang
  • Computer Science, Mathematics
    IEEE Transactions on Wireless Communications
  • 6 October 2018
TLDR
Simulation results demonstrate that an IRS-aided single-cell wireless system can achieve the same rate performance as a benchmark massive MIMO system without using IRS, but with significantly reduced active antennas/RF chains.
Joint Trajectory and Communication Design for Multi-UAV Enabled Wireless Networks
TLDR
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, and proposes an efficient iterative algorithm for solving the problem by applying the block coordinate descent and successive convex optimization techniques.
Intelligent Reflecting Surface Enhanced Wireless Network: Joint Active and Passive Beamforming Design
  • Qingqing Wu, Rui Zhang
  • Computer Science, Mathematics
    IEEE Global Communications Conference (GLOBECOM)
  • 5 September 2018
TLDR
Simulation results show that significant performance gains can be achieved by the proposed algorithms as compared to benchmark schemes, and it is verified that the IRS is able to drastically enhance the link quality and coverage over the conventional setup without the IRS.
Beamforming Optimization for Wireless Network Aided by Intelligent Reflecting Surface With Discrete Phase Shifts
TLDR
Analytically show that as compared to the ideal case with continuous phase shifts, the IRS with discrete phase shifts achieves the same squared power gain in terms of asymptotically large number of reflecting elements, while a constant proportional power loss is incurred that depends only on the number of phase-shift levels.
Accessing From the Sky: A Tutorial on UAV Communications for 5G and Beyond
TLDR
This article gives a tutorial overview of the recent advances in UAV communications, with an emphasis on how to integrate UAVs into the forthcoming fifth-generation (5G) and future cellular networks.
Energy-Efficient Resource Allocation for Wireless Powered Communication Networks
TLDR
This paper considers a wireless powered communication network (WPCN), where multiple users harvest energy from a dedicated power station and then communicate with an information receiving station, and shows that the EE maximization problem for the WPCN can be cast intoEE maximization problems for two simplified networks via exploiting its special structure.
Securing UAV Communications via Joint Trajectory and Power Control
TLDR
The high mobility of the UAV is exploited to proactively establish favorable and degraded channels for the legitimate and eavesdropping links, through its trajectory design, to improve the secrecy rates for both U2G and G2U communications, as compared to other benchmark schemes without power control and/or trajectory optimization.
Common Throughput Maximization in UAV-Enabled OFDMA Systems With Delay Consideration
  • Qingqing Wu, Rui Zhang
  • Computer Science, Mathematics
    IEEE Transactions on Communications
  • 1 January 2018
TLDR
An UAV-enabled orthogonal frequency-division multiple access (OFDMA) network where an UAV is dispatched as the mobile base station (BS) to serve a group of users on the ground and an iterative parameter-assisted block coordinate descent method to optimize the UAV trajectory and OFDMA resource allocation is proposed.
Intelligent Reflecting Surface-Aided Wireless Communications: A Tutorial
TLDR
This paper provides a tutorial overview of IRS-aided wireless communications, and elaborate its reflection and channel models, hardware architecture and practical constraints, as well as various appealing applications in wireless networks.
Intelligent Reflecting Surface: Practical Phase Shift Model and Beamforming Optimization
TLDR
A practical phase shift model that captures the phase-dependent amplitude variation in the element-wise reflection design of intelligent reflecting surface (IRS) is proposed and substantial performance gains are unveiled by the proposed beamforming optimization based on the practical phaseshift model as compared to the conventional ideal model.
...
1
2
3
4
5
...