97 citations · 190 across the 25 of their papers we have counts for
25 papers
An Efficient Convex-Hull Relaxation Based Algorithm for Multi-User Discrete Passive Beamforming
Wenhai Lai, Zheyu Wu, Yi Feng +2
Intelligent reflecting surface (IRS) is an emerging technology to enhance spatial multiplexing in wireless networks. This letter considers the discrete passive beamforming design f…
Quantized Constant-Envelope Waveform Design for Massive MIMO DFRC Systems
Zheyu Wu, Ya-Feng Liu, Wei-Kun Chen +1
Both dual-functional radar-communication (DFRC) and massive multiple-input multiple-output (MIMO) have been recognized as enabling technologies for 6G wireless networks. This paper…
HPE Transformer: Learning to Optimize Multi-Group Multicast Beamforming Under Nonconvex QoS Constraints
Yang Li, Ya-Feng Liu
This paper studies the quality-of-service (QoS) constrained multi-group multicast beamforming design problem, where each multicast group is composed of a number of users requiring…
Random ISAC Signals Deserve Dedicated Precoding
Shihang Lu, Fan Liu, Fuwang Dong +4
Radar systems typically employ well-designed deterministic signals for target sensing, while integrated sensing and communications (ISAC) systems have to adopt random signals to co…
Energy-Efficient Beamforming Design for Integrated Sensing and Communications Systems
Jiaqi Zou, Songlin Sun, Christos Masouros +3
In this paper, we investigate the design of energy-efficient beamforming for an ISAC system, where the transmitted waveform is optimized for joint multi-user communication and targ…
An Efficient Benders Decomposition Approach for Optimal Large-Scale Network Slicing
Wei-Kun Chen, Zheyu Wu, Rui-Jin Zhang +3
This paper considers the network slicing (NS) problem which attempts to map multiple customized virtual network requests to a common shared network infrastructure and allocate netw…
Diversity Order Analysis for Quantized Constant Envelope Transmission
Zheyu Wu, Jiageng Wu, Wei-Kun Chen +1
Quantized constant envelope (QCE) transmission is a popular and effective technique to reduce the hardware cost and improve the power efficiency of 5G and beyond systems equipped w…
Achievable Rate Maximization Pattern Design for Reconfigurable MIMO Antenna Array
Haonan Wang, Ang Li, Ya-Feng Liu +3
Reconfigurable multiple-input multiple-output can provide performance gains over traditional MIMO by reshaping the channels, i.e., introducing more channel realizations. In this pa…
Efficient CI-Based One-Bit Precoding for Multiuser Downlink Massive MIMO Systems with PSK Modulation
Zheyu Wu, Bo Jiang, Ya-Feng Liu +2
In this paper, we consider the one-bit precoding problem for the multiuser downlink massive multiple-input multiple-output (MIMO) system with phase shift keying (PSK) modulation. W…
Covariance-Based Joint Device Activity and Delay Detection in Asynchronous mMTC
Zhaorui Wang, Ya-Feng Liu, Liang Liu
In this letter, we study the joint device activity and delay detection problem in asynchronous massive machine-type communications (mMTC), where all active devices asynchronously t…
Efficient Estimation of Sensor Biases for the 3-Dimensional Asynchronous Multi-Sensor System
Wenqiang Pu, Ya-Feng Liu, Zhi-Quan Luo
An important preliminary procedure in multi-sensor data fusion is \textit{sensor registration}, and the key step in this procedure is to estimate sensor biases from their noisy mea…
Uplink-Downlink Duality Between Multiple-Access and Broadcast Channels with Compressing Relays
Liang Liu, Ya-Feng Liu, Pratik Patil +1
Uplink-downlink duality refers to the fact that under a sum-power constraint, the capacity regions of a Gaussian multiple-access channel and a Gaussian broadcast channel with Hermi…
Optimal Virtual Network Function Deployment for 5G Network Slicing in a Hybrid Cloud Infrastructure
Antonio De Domenico, Ya-Feng Liu, Wei Yu
Network virtualization is a key enabler for 5G systems to support the expected use cases of vertical markets. In this context, we study the joint optimal deployment of Virtual Netw…
Time-Division Energy Beamforming for Multiuser Wireless Power Transfer with Non-Linear Energy Harvesting
Ganggang Ma, Jie Xu, Ya-Feng Liu +1
Energy beamforming has emerged as a promising technique for enhancing the energy transfer efficiency of wireless power transfer (WPT). However, the performance of conventional ener…
Optimal Network Slicing for Service-Oriented Networks with Flexible Routing and Guaranteed E2E Latency
Wei-Kun Chen, Ya-Feng Liu, Antonio De Domenico +2
Network function virtualization is a promising technology to simultaneously support multiple services with diverse characteristics and requirements in the 5G and beyond networks. I…
Phase Transition Analysis for Covariance Based Massive Random Access with Massive MIMO
Zhilin Chen, Foad Sohrabi, Ya-Feng Liu +1
This paper considers a massive random access problem in which a large number of sporadically active devices wish to communicate with a base station (BS) equipped with massive multi…
Max-Min Fairness in IRS-Aided Multi-Cell MISO Systems with Joint Transmit and Reflective Beamforming
Hailiang Xie, Jie Xu, Ya-Feng Liu
This paper investigates an intelligent reflecting surface (IRS)-aided multi-cell multiple-input single-output (MISO) system with several multi-antenna base stations (BSs) each comm…
Joint Switch Upgrade and Controller Deployment in Hybrid Software-Defined Networks
Zehua Guo, Weikun Chen, Ya-Feng Liu +2
To improve traffic management ability, Internet Service Providers (ISPs) are gradually upgrading legacy network devices to programmable devices that support Software-Defined Networ…
An Enhanced SDR based Global Algorithm for Nonconvex Complex Quadratic Programs with Signal Processing Applications
Cheng Lu, Ya-Feng Liu, Jing Zhou
In this paper, we consider a class of nonconvex complex quadratic programming (CQP) problems, which find a broad spectrum of signal processing applications. By using the polar coor…
Optimized Base-Station Cache Allocation for Cloud Radio Access Network with Multicast Backhaul
Binbin Dai, Ya-Feng Liu, Wei Yu
The performance of cloud radio access network (C-RAN) is limited by the finite capacities of the backhaul links connecting the centralized processor (CP) with the base-stations (BS…
One-Bit Precoding and Constellation Range Design for Massive MIMO with QAM Signaling
Foad Sohrabi, Ya-Feng Liu, Wei Yu
The use of low-resolution digital-to-analog converters (DACs) for transmit precoding provides crucial energy efficiency advantage for massive multiple-input multiple-output (MIMO)…
Technical Report for "Incentivizing Wi-Fi Network Crowdsourcing: A Contract Theoretic Approach"
Qian Ma, Lin Gao, Ya-Feng Liu +1
Crowdsourced wireless community network enables individual users to share their private Wi-Fi access points (APs) with each other, hence can achieve a large Wi-Fi coverage with a s…
Joint Base Station Clustering and Beamforming for Non-Orthogonal Multicast and Unicast Transmission with Backhaul Constraints
Erkai Chen, Meixia Tao, Ya-Feng Liu
The demand for providing multicast services in cellular networks is continuously and fastly increasing. In this work, we propose a non-orthogonal transmission framework based on la…
Network Slicing for Service-Oriented Networks Under Resource Constraints
Nan Zhang, Ya-Feng Liu, Hamid Farmanbar +3
To support multiple on-demand services over fixed communication networks, network operators must allow flexible customization and fast provision of their network resources. One eff…