164 citations · 625 across the 62 of their papers we have counts for
62 papers
Asynchronous Cell-Free Massive MIMO With Rate-Splitting
Jiakang Zheng, Jiayi Zhang, Julian Cheng +3
In practical cell-free (CF) massive multiple-input multiple-output (MIMO) networks with distributed and low-cost access points, the asynchronous arrival of signals at the user equi…
Performance Analysis of Cell-Free Massive MIMO Systems with Asynchronous Reception
Jiakang Zheng, Zhuoyi Zhao, Jiayi Zhang +2
Cell-free (CF) massive multiple-input multiple-output (MIMO) is considered as a promising technology for achieving the ultimate performance limit. However, due to its distributed a…
On the Ergodic Mutual Information of Keyhole MIMO Channels With Finite-Alphabet Inputs
Chongjun Ouyang, Ali Bereyhi, Saba Asaad +3
This letter studies the ergodic mutual information (EMI) of keyhole multiple-input multiple-output channels having finite-alphabet input signals. The EMI is first investigated for…
Asymptotic Average Mutual Information Over Finite Input Mixture Gamma Distributed Channels
Chongjun Ouyang, Sheng Wu, Chunxiao Jiang +3
This letter establishes a unified analytical framework to study the asymptotic average mutual information (AMI) of mixture gamma (MG) distributed fading channels driven by finite i…
Multi-Pair Two-Way Massive MIMO DF Relaying Over Rician Fading Channels Under Imperfect CSI
Zhangjie Peng, Shuxian Wang, Cunhua Pan +3
We investigate a multi-pair two-way decode-andforward relaying aided massive multiple-input multiple-output antenna system under Rician fading channels, in which multiple pairs of…
Secrecy Capacity Bounds for Visible Light Communications With Signal-Dependent Noise
Jin-Yuan Wang, Xian-Tao Fu, Jun-Bo Wang +3
In physical-layer security, one of the most fundamental issues is the secrecy capacity. The objective of this paper is to determine the secrecy capacity for an indoor visible light…
Beam Tracking for UAV-Assisted FSO Links With a Four-Quadrant Detector
Hossein Safi, Akbar Dargahi, Julian Cheng
A ground-to-air free-space optical link is studied for a hovering unmanned aerial vehicle (UAV) having multiple rotors. For this UAV, a four-quadrant array of photodetectors is use…
Outage Analysis and Beamwidth Optimization for Positioning-Assisted Beamforming
Bingcheng Zhu, Zaichen Zhang, Julian Cheng
Conventional beamforming is based on channel estimation, which can be computationally intensive and inaccurate when the antenna array is large. In this work, we study the outage pr…
Hovering UAV-Based FSO Communications: Channel Modelling, Performance Analysis, and Parameter Optimization
Jin-Yuan Wang, Yang Ma, Rong-Rong Lu +3
Relay-assisted free-space optical (FSO) communication systems are exploited as a means to mitigate the limiting effects of the turbulence induced atmospheric scintillation. However…
Sparse Channel Reconstruction With Nonconvex Regularizer via DC Programming for Massive MIMO Systems
Pengxia Wu, Hui Ma, Julian Cheng
Sparse channel estimation for massive multiple-input multiple-output systems has drawn much attention in recent years. The required pilots are substantially reduced when the sparse…
A Splitting-Detection Joint-Decision Receiver for Ultrasonic Intra-Body Communications
Qianqian Wang, Quansheng Guan, Julian Cheng +1
Ultrasonic intra-body communication (IBC) is a promising enabling technology for future healthcare applications, due to low attenuation and medical safety of ultrasonic waves for t…
Nonconvex Regularized Gradient Projection Sparse Reconstruction for Massive MIMO Channel Estimation
Pengxia Wu, Julian Cheng
Novel sparse reconstruction algorithms are proposed for beamspace channel estimation in massive multiple-input multiple-output systems. The proposed algorithms minimize a least-squ…
Quantum Discrimination of Two Noisy Displaced Number States
Renzhi Yuan, Julian Cheng
The quantum discrimination of two non-coherent states draws much attention recently. In this letter, we first consider the quantum discrimination of two noiseless displaced number…
Tight Capacity Bounds for Indoor Visible Light Communications With Signal-Dependent Noise
Jin-Yuan Wang, Xian-Tao Fu, Rong-Rong Lu +3
Channel capacity bounds are derived for a point-to-point indoor visible light communications (VLC) system with signal-dependent Gaussian noise. Considering both illumination and co…
Few-Mode Fiber Coupling Efficiency for Free-Space Optical Communication
Xingjie Fan, Dawei Wang, Julian Cheng +2
Few-mode fiber is a significant component of free-space optical communication at the receiver to obtain achievable high coupling efficiency. A theoretical coupling model from the f…
Physical Layer Security Over Mixture Gamma Distributed Fading Channels With Discrete Inputs: A Unified and General Analytical Framework
Chongjun Ouyang, Sheng Wu, Chunxiao Jiang +2
Physical layer security is investigated over mixture Gamma (MG) distributed fading channels with discrete inputs. By the Gaussian quadrature rules, closed-form expressions are deri…
Physical-Layer Security for Two-Hop Air-to-Underwater Communication Systems With Fixed-Gain Amplify-and-Forward Relaying
Yi Lou, Ruofan Sun, Julian Cheng +3
We analyze a secure two-hop mixed radio frequency (RF) and underwater wireless optical communication (UWOC) system using a fixed-gain amplify-and-forward (AF) relay. The UWOC chann…
Secrecy Outage Analysis of Two-Hop Decode-and-Forward Mixed RF/UWOC Systems
Yi Lou, Ruofan Sun, Julian Cheng +2
We analyze the secrecy performance of a two-hop mixed radio frequency (RF)/underwater wireless optical communication (UWOC) system using a decode-and-forward (DF) relay. All RF and…
Performance of Underwater Wireless Optical Communications in Presents of Cascaded Mixture Exponential-Generalized Gamma Turbulence
Yi Lou, Julian Cheng, Donghu Nie +1
Underwater wireless optical communication is one of the critical technologies for buoy-based high-speed cross-sea surface communication, where the communication nodes are verticall…
Covert Transmission Assisted by Intelligent Reflecting Surface
Jiangbo Si, Zan Li, Yan Zhao +4
Covert transmission is studied for an intelligent reflecting surface (IRS) aided communication system, where Alice aims to transmit messages to Bob without being detected by the wa…
Optimally Displaced Threshold Detection for Discriminating Binary Coherent States Using Imperfect Devices
Renzhi Yuan, Mufei Zhao, Shuai Han +1
Because of the potential applications in quantum information processing tasks, discrimination of binary coherent states using generalized Kennedy receiver with maximum a posteriori…
Deep Unfolding Basis Pursuit: Improving Sparse Channel Reconstruction via Data-Driven Measurement Matrices
Pengxia Wu, Julian Cheng
For massive multiple-input multiple-output (MIMO) systems operating in frequency-division duplex mode, downlink channel state information (CSI) acquisition will incur large overhea…
Device-Clustering and Rate-Splitting Enabled Device-to-Device Cooperation Framework in Fog Radio Access Network
Md. Zoheb Hassan, Md. Jahangir Hossain, Julian Cheng +1
Resource allocation is investigated to enhance the performance of device-to-device (D2D) cooperation in a fog radio access network (F-RAN) architecture. Our envisioned framework en…
Free-Space Optical Communication Using Non-mode-Selective Photonic Lantern Based Coherent Receiver
Bo Zhang, Renzhi Yuan, Jianfeng Sun +2
A free-space optical communication system using non-mode-selective photonic lantern (PL) based coherent receiver is studied. Based on the simulation of photon distribution, the pow…