175 citations · 651 across the 63 of their papers we have counts for
63 papers
Game-Theoretic Multi-Agent Reinforcement Learning for Swarm Trajectory Planning in Low-Altitude Wireless Networks
Nguyen Duc Minh Quang, Ruoxi Chong, Zhiqiang Wei +2
The Low-Altitude Economy (LAE) is rapidly expanding, giving rise to low-altitude wireless networks (LAWNs), where large-scale cellular-connected unmanned aerial vehicle (UAV) deplo…
OFDM Waveform Optimization for Bistatic Integrated Sensing and Communications
Ruolin Du, Zhiqiang Wei, Zai Yang +3
This paper investigates the design of orthogonal frequency-division multiplexing (OFDM) waveforms for bistatic integrated sensing and communication (ISAC) systems. In the considere…
Hybrid Iterative Detection for OTFS: Interplay between Local L-MMSE and Global Message Passing
Ruohai Yang, Shuangyang Li, Han Yu +3
Orthogonal time frequency space (OTFS) modulation has emerged as a robust solution for high-mobility wireless communications. However, conventional detection algorithms, such as li…
Delay-Doppler Domain Signal Processing Aided OFDM (DD-a-OFDM) for 6G and Beyond
Yiyan Ma, Bo Ai, Jinhong Yuan +10
High-mobility scenarios will be a critical part of 6G systems. Since the widely deployed orthogonal frequency division multiplexing (OFDM) waveform suffers from subcarrier orthogon…
Channel Knowledge Map-assisted Dual-domain Tracking and Predictive Beamforming for High-Mobility Wireless Networks
Ruolin Du, Zhiqiang Wei, Zai Yang +4
This paper introduces a novel channel knowledge map (CKM)-assisted dual-domain tracking and predictive beamforming scheme for high-mobility wireless networks. The central premise i…
Low-Complexity Minimum BER Precoder Design for ISAC Systems: A Delay-Doppler Perspective
Jun Wu, Weijie Yuan, Zhiqiang Wei +3
Orthogonal time frequency space (OTFS) modulation is anticipated to be a promising candidate for supporting integrated sensing and communications (ISAC) systems, which is considere…
Analysis of Cross-Domain Message Passing for OTFS Transmissions
Ruoxi Chong, Shuangyang Li, Zhiqiang Wei +3
In this paper, we investigate the performance of the cross-domain iterative detection (CDID) framework with orthogonal time frequency space (OTFS) modulation, where two distinct CD…
Resource Allocation Design for Next-Generation Multiple Access: A Tutorial Overview
Zhiqiang Wei, Dongfang Xu, Shuangyang Li +3
Multiple access is the cornerstone technology for each generation of wireless cellular networks and resource allocation design plays a crucial role in multiple access. In this pape…
Networked Integrated Sensing and Communications for 6G Wireless Systems
Jiapeng Li, Xiaodan Shao, Feng Chen +4
Integrated sensing and communication (ISAC) is envisioned as a key pillar for enabling the upcoming sixth generation (6G) communication systems, requiring not only reliable communi…
Fundamentals of Delay-Doppler Communications: Practical Implementation and Extensions to OTFS
Shuangyang Li, Peter Jung, Weijie Yuan +4
The recently proposed orthogonal time frequency space (OTFS) modulation, which is a typical Delay-Doppler (DD) communication scheme, has attracted significant attention thanks to i…
Sensing-Enhanced Secure Communication: Joint Time Allocation and Beamforming Design
Dongfang Xu, Yiming Xu, Zhiqiang Wei +2
The integration of sensing and communication enables wireless communication systems to serve environment-aware applications. In this paper, we propose to leverage sensing to enhanc…
Optimal BER Minimum Precoder Design for OTFS-Based ISAC Systems
Jun Wu, Weijie Yuan, Zhiqiang Wei +2
This paper investigates the bit error rate (BER) minimum pre-coder design for an orthogonal time frequency space (OTFS)-based integrated sensing and communications (ISAC) system, w…
On the Pulse Shaping for Delay-Doppler Communications
Shuangyang Li, Weijie Yuan, Zhiqiang Wei +3
In this paper, we study the pulse shaping for delay-Doppler (DD) communications. We start with constructing a basis function in the DD domain following the properties of the Zak tr…
Information-Theoretic Limits of Bistatic Integrated Sensing and Communication
Tian Jiao, Kai Wan, Zhiqiang Wei +4
Bistatic sensing refers to scenarios where the transmitter (illuminating the target) and the sensing receiver (estimating the target state) are physically separated, in contrast to…
Integrated Sensing, Navigation, and Communication for Secure UAV Networks with a Mobile Eavesdropper
Zhiqiang Wei, Fan Liu, Chang Liu +3
This paper proposes an integrated sensing, navigation, and communication (ISNC) framework for safeguarding unmanned aerial vehicle (UAV)-enabled wireless networks against a mobile…
Scalable Predictive Beamforming for IRS-Assisted Multi-User Communications: A Deep Learning Approach
Chang Liu, Xuemeng Liu, Zhiqiang Wei +2
Beamforming design for intelligent reflecting surface (IRS)-assisted multi-user communication (IRS-MUC) systems critically depends on the acquisition of accurate channel state info…
New Delay Doppler Communication Paradigm in 6G era: A Survey of Orthogonal Time Frequency Space (OTFS)
Weijie Yuan, Shuangyang Li, Zhiqiang Wei +4
In the 6G era, space-air-Ground integrated networks (SAGIN) are anticipated to deliver global coverage, necessitating support for a diverse array of emerging applications in high-m…
Orthogonal Time Frequency Space Modulation -- Part III: ISAC and Potential Applications
Weijie Yuan, Zhiqiang Wei, Shuangyang Li +2
The first two parts of this tutorial on orthogonal time frequency space (OTFS) modulation have discussed the fundamentals of delay-Doppler (DD) domain communications as well as som…
Orthogonal Time Frequency Space Modulation -- Part II: Transceiver Designs
Shuangyang Li, Weijie Yuan, Zhiqiang Wei +2
The fundamental concepts and challenges of orthogonal time frequency space (OTFS) modulation have been reviewed in Part I of this three-part tutorial. In this second part, we provi…
Orthogonal Time Frequency Space Modulation -- Part I: Fundamentals and Challenges Ahead
Zhiqiang Wei, Shuangyang Li, Weijie Yuan +2
This letter is the first part of a three-part tutorial on orthogonal time frequency space (OTFS) modulation, which is a promising candidate waveform for future wireless networks. T…
Resource Allocation and 3D Trajectory Design for Power-Efficient IRS-Assisted UAV-NOMA Communications
Yuanxin Cai, Zhiqiang Wei, Shaokang Hu +3
In this paper, an intelligent reflecting surface (IRS) is introduced to assist an unmanned aerial vehicle (UAV) communication system based on non-orthogonal multiple access (NOMA)…
Faster-than-Nyquist Asynchronous NOMA Outperforms Synchronous NOMA
Shuangyang Li, Zhiqiang Wei, Weijie Yuan +4
Faster-than-Nyquist (FTN) signaling aided non-orthogonal multiple access (NOMA) is conceived and its achievable rate is quantified in the presence of random link delays of the diff…
Beamforming Design for Intelligent Reflecting Surface-Enhanced Symbiotic Radio Systems
Shaokang Hu, Chang Liu, Zhiqiang Wei +3
This paper investigates multiuser multi-input single-output downlink symbiotic radio communication systems assisted by an intelligent reflecting surface (IRS). Different from exist…
Resource Allocation for Simultaneous Wireless Information and Power Transfer Systems: A Tutorial Overview
Zhiqiang Wei, Xianghao Yu, Derrick Wing Kwan Ng +1
Over the last decade, simultaneous wireless information and power transfer (SWIPT) has become a practical and promising solution for connecting and recharging battery-limited devic…