590 citations · 2.4k across the 96 of their papers we have counts for
19 papers · 1 filter
Transmit Power Pool Design for Grant-Free NOMA-IoT Networks via Deep Reinforcement Learning
Muhammad Fayaz, Wenqiang Yi, Yuanwei Liu +1
Grant-free non-orthogonal multiple access (GF-NOMA) is a potential multiple access framework for short-packet internet-of-things (IoT) networks to enhance connectivity. However, th…
Signal Fractions Analysis and Safety-Distance Modeling in V2V Inter-lane Communications
Wenqiang Yi, Yuanwei Liu, Arumugam Nallanathan
For vehicular networks, safety distances are important, but existing spatial models fail to characterize this parameter, especially for inter-lane communications. This work propose…
RACH in Self-Powered NB-IoT Networks: Energy Availability and Performance Evaluation
Yan Liu, Yansha Deng, Maged Elkashlan +3
NarrowBand-Internet of Things (NB-IoT) is a new 3GPP radio access technology designed to provide better coverage for a massive number of low-throughput low-cost devices in delay-to…
Analysis of Random Access in NB-IoT Networks with Three Coverage Enhancement Groups: A Stochastic Geometry Approach
Yan Liu, Yansha Deng, Nan Jiang +2
NarrowBand-Internet of Things (NB-IoT) is a new 3GPP radio access technology designed to provide better coverage for Low Power Wide Area (LPWA) networks. To provide reliable connec…
Caching Placement and Resource Allocation for Cache-Enabling UAV NOMA Networks
Tiankui Zhang, Ziduan Wang, Yuanwei Liu +2
This article investigates the cache-enabling unmanned aerial vehicle (UAV) cellular networks with massive access capability supported by non-orthogonal multiple access (NOMA). The…
Cache-enabling UAV Communications: Network Deployment and Resource Allocation
Tiankui Zhang, Yi Wang, Yuanwei Liu +2
In this article, we investigate the content distribution in the hotspot area, whose traffic is offloaded by the combination of the unmanned aerial vehicle (UAV) communication and e…
Joint Transmit Power and Placement Optimization for URLLC-enabled UAV Relay Systems
Hong Ren, Cunhua Pan, Kezhi Wang +3
This letter considers an unmanned aerial vehicle (UAV)-enabled relay communication system for delivering latency-critical messages with ultra-high reliability, where the relay is o…
Resource Allocation in Uplink NOMA-IoT Networks: A Reinforcement-Learning Approach
Waleed Ahsan, Wenqiang Yi, Zhijin Qin +2
Non-orthogonal multiple access (NOMA) exploits the potential of the power domain to enhance the connectivity for the Internet of Things (IoT). Due to time-varying communication cha…
UAV-Aided Multi-Way NOMA Networks with Residual Hardware Impairments
Xingwang Li, Qunshu Wang, Yuanwei Liu +3
In this paper, we study an unmanned aerial vehicle (UAV)-aided non-orthogonal multiple access (NOMA) multi-way relaying networks (MWRNs). Multiple terrestrial users aim to exchange…
A Decoupled Learning Strategy for Massive Access Optimization in Cellular IoT Networks
Nan Jiang, Yansha Deng, Arumugam Nallanathan +1
Cellular-based networks are expected to offer connectivity for massive Internet of Things (mIoT) systems. However, their Random Access CHannel (RACH) procedure suffers from unrelia…
Secrecy Analysis of Ambient Backscatter NOMA Systems under I/Q Imbalance
Xingwang Li, Mengle Zhao, Yuanwei Liu +3
We investigate the reliability and security of the ambient backscatter (AmBC) non-orthogonal multiple access (NOMA) systems, where the source aims to communication with two NOMA us…
Robust Transmission Design for Intelligent Reflecting Surface Aided Secure Communication Systems with Imperfect Cascaded CSI
Sheng Hong, Cunhua Pan, Hong Ren +3
In this paper, we investigate the design of robust and secure transmission in intelligent reflecting surface (IRS) aided wireless communication systems. In particular, a multi-ante…
Robust Beamforming Design for Intelligent Reflecting Surface Aided Cognitive Radio Systems with Imperfect Cascaded CSI
Lei Zhang, Cunhua Pan, Yu Wang +2
In this paper, intelligent reflecting surface (IRS) is introduced to enhance the network performance of cognitive radio (CR) systems. Specifically, we investigate robust beamformin…
Resource Allocation for Intelligent Reflecting Surface Aided Wireless Powered Mobile Edge Computing in OFDM Systems
Tong Bai, Cunhua Pan, Hong Ren +3
Wireless powered mobile edge computing (WP-MEC) has been recognized as a promising technique to provide both enhanced computational capability and sustainable energy supply to mass…
Outage Behaviors of NOMA-based Satellite Network over Shadowed-Rician Fading Channels
Xinwei Yue, Yuanwei Liu, Yuanyuan Yao +4
This paper investigates the application of non-orthogonal multiple access (NOMA) to satellite communication network over Shadowed-Rician fading channels. The impact of imperfect su…
Energy Efficient Multicast Precoding for Multiuser Multibeam Satellite Communications
Chenhao Qi, Huajian Chen, Yansha Deng +1
Aiming at maximizing the energy efficiency (EE) of multicast multibeam satellite communications, we consider the precoding design under the total power and quality of service (QoS)…
Analyzing Grant-Free Access for URLLC Service
Yan Liu, Yansha Deng, Maged Elkashlan +2
5G New Radio (NR) is expected to support new ultra-reliable low-latency communication (URLLC) service targeting at supporting the small packets transmissions with very stringent la…
Artificial-Noise-Aided Secure MIMO Wireless Communications via Intelligent Reflecting Surface
Sheng Hong, Cunhua Pan, Hong Ren +2
This paper considers a MIMO secure wireless communication system aided by the physical layer security technique of sending artificial noise (AN). To further enhance the system secu…
A Framework of Robust Transmission Design for IRS-aided MISO Communications with Imperfect Cascaded Channels
Gui Zhou, Cunhua Pan, Hong Ren +2
Intelligent reflection surface (IRS) has recently been recognized as a promising technique to enhance the performance of wireless systems due to its ability of reconfiguring the si…