Yuanjian Li

• Doctor of Philosophy
• Research Fellow at Nanyang Technological University

In this paper, we consider a wireless uplink transmission scenario in which an unmanned aerial vehicle (UAV) serves as an aerial base station collecting data from ground users. To optimise the expected sum uplink transmit rate without any prior knowledge of ground users (e.g., locations, channel state information and transmit power), the trajectory...

To enhance transmission performance, privacy level, and energy manipulating efficiency of wireless networks, this paper initiates a novel simultaneous wireless information and power transfer (SWIPT) full-duplex (FD) relaying protocol, named harvest-andopportunistically- relay (HOR). Due to the FD characteristics, the dynamic fluctuation of relay’s...

Integrating unmanned aerial vehicles (UAVs) into existing cellular networks encounters lots of challenges, among which one of the most striking concerns is how to achieve harmonious coexistence of aerial transceivers, inter alia, UAVs, and terrestrial user equipments (UEs). In this paper, a cellular-connected UAV network is focused, where multiple...

This manuscript was accepted by IEEE Transactions on Wireless Communications on 19th March 2022, of which the preprint version was available in ResearchGate months ago to the acceptance. The link of this preprint version is https://www.researchgate.net/publication/354235269_Path_Planning_for_Cellular-Connected_UAV_A_DRL_Solution_with_Quantum-Inspir...

Channel estimation (CE) is a critical challenge in harnessing the potential of Terahertz (THz) ultra-massive multiple-input multiple-output (UM-MIMO) systems. Sparsity-exploiting compressed sensing (CS)-aided CE (CSCE) can enhance THz UM-MIMO CE performance with affordable pilot overhead. However, the near-field propagation region becomes significa...

In this paper, the problem of energy-efficient unmanned aerial vehicle (UAV)-assisted multi-access task offloading is investigated. In the studied system, several UAVs are deployed as edge servers to cooperatively aid task executions for several energy-limited computation-scarce terrestrial user equipments (UEs). An expected energy efficiency maxim...

This letter proposes a downlink cell-free massive multiple-input multiple-output (CF-mMIMO) network architecture integrating terahertz (THz) backhaul and millimeter wave (mmWave) access, where a source server transmits signals to the central processing unit (CPU) via THz links, then enabling adaptive decode-and-forward transmission to multiple fibe...

Integrating unmanned aerial vehicles (UAVs) into existing cellular networks encounters lots of challenges, among which one of the most striking concerns is how to achieve harmonious coexistence of aerial transceivers, inter alia, UAVs, and terrestrial user equipments (UEs). In this paper, a cellular-connected UAV network is focused, where multiple...

This is the research proposal for applying for the Leverhulme Trust Early Career Fellowship. Feel free to use it to inspire your research or career. 这个研究报告是用来申请下列项目的：Leverhulme Trust Early Career Fellowship。欢迎用它来启发你的研究和事业。 Background The sixth-generation (6G) wireless systems, inter alia, cell-free distributed multiple-input multiple-output (MIMO)...

This is the research proposal for applying for the Royal Commission for the Exhibition of 1851 Research Fellowship in Science or Engineering. Feel free to use it to inspire your research or career. 这个研究报告是用来申请下列项目的：the Royal Commission for the Exhibition of 1851 Research Fellowship in Science or Engineering。欢迎用它来启发你的研究和事业。 To overcome these limit...

The Research Proposal for initiating this project, i.e., the flint for stimulating the spark that can lead to a wildfire! Interested researchers are welcome to contact me for potential collaborations! Together, let us revolute the future!

This is the research proposal for applying for the Virgina Tech’s Presidential Postdoctoral Fellowship. Feel free to use it to inspire your research or career. 这个研究报告是用来申请下列项目的：Virgina Tech’s Presidential Postdoctoral Fellowship。欢迎用它来启发你的研究和事业。 translate into Chinese: Distributed, Quantum Multi-Agent Deep Reinforcement Learning for Wireless 6G Syst...

This is the research proposal for applying for the Virgina Tech’s Presidential Postdoctoral Fellowship. Feel free to use it to inspire your research or career. 这个研究报告是用来申请下列项目的：Virgina Tech’s Presidential Postdoctoral Fellowship。欢迎用它来启发你的研究和事业。 translate into Chinese: Distributed, Quantum Multi-Agent Deep Reinforcement Learning for Wireless 6G Sys...

This is a simple but neat template of response letter for researchers who are interested, please feel free to use it as a template to reproduce your own response letter to reviewers.

In the presence of Warden's detection, a maximization problem on transmission throughput from unmanned aerial vehicle (UAV) to legitimate nodes is considered and solved via UAV trajectory design, subject to covert, velocity and mobility constraints. With the building-distribution-based pathloss model and the Warden's uncertain location model, the f...

Note that this publication is the conference version of our preprinted journal paper "Path Planning for Cellular-Connected UAV: A DRL Solution with Quantum-Inspired Experience Replay". The following is the original abstract of this conference paper. In cellular-connected unmanned aerial vehicle (UAV) network, a minimization problem on the weighted...

In cellular-connected unmanned aerial vehicle (UAV) network, a minimization problem on the weighted sum of time cost and expected outage duration is considered. Taking advantage of UAV's adjustable mobility, an intelligent UAV navigation approach is formulated to achieve the aforementioned optimization goal. Specifically, after mapping the navigati...

In this paper, we consider a wireless uplink transmission scenario in which an unmanned aerial vehicle (UAV) serves as an aerial base station collecting data from ground users. To optimize the expected sum uplink transmit rate without any prior knowledge of ground users (e.g., locations, channel state information and transmit power), the trajectory...

In this paper, a novel opportunistic scheduling (OS) scheme with antenna selection (AS) for the energy harvesting (EH) cooperative communication system where the relay can harvest energy from the source transmission is proposed. In this considered scheme, we take into both traditional mathematical analysis and reinforcement learning (RL) scenarios...

In this paper, the physical layer security is investigated in a dual-hop wireless communication scenario, where an energy-constrained relay not only assists the source-to-destination information transmission, but also acts as a potential eavesdropper wiretapping the source information. We take into account both antenna mode switching and destinatio...

In Rayleigh fading channels, to enhance the secrecy performance of the wireless communication systems and efficiently disturb the interception of the eavesdropper, the multipleantenna transmit node utilizes the artificial noise aided precoding (ANP) strategy with imperfect channel state information (CSI) to emit the confidential information and the...

We investigate the secrecy rate optimization problem in a wiretap channel with a single-antenna source, a singleantenna eavesdropper, and a multiple-antenna full-duplex (FD) destination. To fully utilize the spatial degrees of freedom of multiple antennas, the function of antennas at the destination is not predefined, i.e., each antenna can operate...

In Rayleigh fading channels, we investigate the secrecy performance of a full-duplex relay secure transmission system. To improve the secrecy capacity of the system and efficiently interfere the interception of the eavesdropper, the multiple-antenna source applies the artificial noise aided precoding (ANP) scheme to broadcast the intended signal an...