Yiqing Li

Sun Yat-Sen University | SYSU · School of Electronics and Information Technology

In backscatter sensor networks, performing over-the-air computation (AirComp) is challenging, because backscat-ter devices are impossible to accomplish channel estimation and precoding operations to offset the distortions caused by wireless channels. In this letter, we propose an orthogonal space-time block code based AirComp scheme for a monostati...

To obtain precise sensing data for achieving wireless network intelligence within the confines of the limited available spectrum, there has been an increasing interest in dual-functional radar and communication. This letter focuses on a dual-functional radar and relaying system, where the half-duplex amplify-and-forward radar-enabled relay (RR) nee...

Dual-functional radar-communication (DFRC) has been viewed as a promising component in future networks. The considered two-cell interfering DFRC network involves two multi-antenna base stations (BSs), and each BS serves multiple single-antenna users and receives echo signals to detect the target. An optimization framework for the joint transmit bea...

Benefiting from exploiting the waveform superposition property in the multi-access channels, over-the-air computation (AirComp) has emerged as a promising technique to swiftly compute functions of data from a large number of sensors. To enlarge the wireless coverage area, a two-phase multi-antenna amplify-and-forward (AF)-relay aided AirComp system...

In this paper, we investigate the achievable rate region maximization for intelligent reflecting surfaces (IRSs)-assisted interference channel (IFC), where more than one pair of transceivers communicates and interferes with each other simultaneously. Specifically, we optimize the transmit power and passive beamforming vectors at all the IRSs to obt...

In this letter, we investigate a multi-relay assisted over-the-air computation network for multi-modal sensing with direct links, where each node is equipped with multiple antennas and all the relays are operated in an amplify-and-forward mode. Specifically, the whole transmission is divided into two phases and all the sensors transmit symbols duri...

The orbital angular momentum (OAM)-based communication systems may face severe transmission problems when the transmit and receive uniform circular array pairs are blocked. In this paper, a promising technique named intelligent reflecting surface (IRS) is proposed to help alleviate blockages and provide alternative line-of-sight links. To maximize...

Wireless network virtualization is a promising solution to improve spectrum efficiency. For a wireless downlink communication system with multiple mobile virtual network operators (MVNOs), we propose a decentralized blockchain-based dynamic spectrum acquisition scheme. Our proposed scheme aims to minimize the sum transmit power at all MVNOs while s...

Considering reconfigurable intelligent surfaces (RISs), we study a multi-cluster multiple-input-single-output (MISO) non-orthogonal multiple access (NOMA) downlink communication network. In the network, RISs assist the communication from the base station (BS) to all users by passive beamforming. Our goal is to minimize the total transmit power by j...

Incorporating wireless caching in non-orthogonal multiple access (NOMA) networks is a promising technique to reduce the delivery latency and improve the quality of service. In this paper, we study a cache content placement optimization problem in a cellular NOMA downlink wireless caching network. Our goal is to minimize the average transmit power u...

Considering intelligent reflecting surface (IRS), we study a multi-cluster multiple-input-single-output (MISO) non-orthogonal multiple access (NOMA) downlink communication network. In the network, an IRS assists the communication from the base station (BS) to all users by passive beamforming. Our goal is to minimize the total transmit power by join...

In [1] , the title of the paper should be: “Joint Position and Time Allocation Optimization of UAV Enabled Wireless Powered Communication Networks.”

Symbiotic radio (SR) networks are possible solutions to the future low-power wireless communications for massive Internet of Things devices. In this paper, we investigate a multiple-input-single-output non-orthogonal multiple access (NOMA) backscatter device (BD) aided SR network with a potential eavesdropper. In the network, a base station (BS) br...

In this paper, we investigate an unmanned aerial vehicle (UAV) enabled wireless powered communication network, where a UAV with constant power supply first charges all users by transmitting wireless energy to all users simultaneously and after that all users send their own information to the UAV. Our target is the joint optimization of the time all...

In this paper, a multiple-input-multiple-output wiretap channel model is studied, where the information packet sent from the transmitter to the desired receiver is wiretapped by a potential eavesdropper. When ideal channel state information (CSI) is available, we design the secure beamforming using a proposed iterative closed-form updating scheme b...

Nonorthogonal multiple access (NOMA) has been considered as a promising candidate for fifth-generation wireless communication systems. In this paper, we consider a two-cell multiple-input-multiple-output NOMA downlink interference channel with one multi-antenna base station (BS) and multiple multi-antenna users in each cell. Each user treats interf...

Cooperative non-orthogonal multiple access (NOMA) systems inherit advantages of the NOMA protocol and the cooperative relay. In this paper, we propose cooperative NOMA systems in multiple-input-multiple-output channels. The whole transmission is divided into two phases. In the first phase, the base station broadcasts signals using the NOMA protocol...

In this letter, we consider a cellular downlink multiple-input-multiple-output non-orthogonal multiple access (NOMA) secure transmission network which consists of a base station, a central user, and a cell-edge user. The base station and two users are all equipped with multiple antennas. The central user is an entrusted user and the cell-edge user...

In this paper, we consider a cellular downlink multiple-input-single-output non-orthogonal multiple access (NOMA) secure transmission system where users are grouped as multiple clusters. Each cluster consists of a central user and a cell-edge user. The central user is an entrusted user and the cell-edge user is a potential eavesdropper. We focus on...