24 citations · 32 across the 17 of their papers we have counts for
21 papers
On the Gaussian-Quadratic Rate-Distortion Function for Vector Sources with Individual Distortion Constraints
Shuao Chen, Junyuan Gao, Yuxuan Shi +4
This paper investigates the Gaussian-quadratic lossy compression with arbitrary source length under individual distortion constraints. The rate-distortion function (RDF) is lower-b…
A Modular O-RAN Testbed Based on SRS Open Source O-CU/O-DU and Massive Beams Modular O-RU
Fabian Göttsch, Oriol Font-Bach, Andreas Benzin +5
In this paper, we present a modular open radio access network (O-RAN) consisting of the 5G Core, a central (O-CU) and distributed unit (O-DU) by Software Radio Systems (SRS) and an…
Capacity-Region-Achieving Sparse Regression Codes for MIMO Multiple-Access Channels
Hao Yan, Lei Liu, Yuhao Liu +2
This paper proposes a coding framework for capacity-region-achieving sparse regression (SR) codes over MIMO multiple-access channels (MIMO-MAC), where a single SR code is used for…
Artificial Magnetic Conductor Frame to Improve Impedance Matching and Radiation Symmetry in 22 Array for 6G Applications
Edoardo Giusti, Krishan Kumar Tiwari, C. J. Reddy +3
An Artificial Magnetic Conductor (AMC) frame capable of improving the impedance matching of a 22 array for 6G applications without degrading isolation performance is presen…
FDD CSI Feedback under Finite Downlink Training: A Rate-Distortion Perspective
Shuao Chen, Junyuan Gao, Yuxuan Shi +4
This paper establishes the theoretical limits of channel state information (CSI) feedback in frequency-division duplexing (FDD) multi-antenna orthogonal frequency-division multiple…
Joint Lossy Compression for a Vector Gaussian Source under Individual Distortion Criteria
Shuao Chen, Junyuan Gao, Yuxuan Shi +4
This paper investigates the joint compression problem of a vector Gaussian source, where an individual distortion constraint is imposed on each source component. It is known that t…
Multi-view imaging in networked sensing systems: A covariance-based approach
Junyuan Gao, Weifeng Zhu, Yanmo Hu +5
This paper considers multi-view imaging in a sixth-generation (6G) integrated sensing and communication network, which consists of a transmit base-station (BS), multiple receive BS…
Integrated Massive Communication and Target Localization in 6G Cell-Free Networks
Junyuan Gao, Weifeng Zhu, Shuowen Zhang +4
This paper presents an initial investigation into the combination of integrated sensing and communication (ISAC) and massive communication, both of which are largely regarded as ke…
A joint channel estimation and beamforming separation principle for massive MIMO systems
Lorenzo Miretti, Slawomir Stańczak, Giuseppe Caire
We demonstrate that separating beamforming (i.e., downlink precoding and uplink combining) and channel estimation in multi-user MIMO wireless systems incurs no loss of optimality u…
Finite-Blocklength Information Theory
Junyuan Gao, Shuao Chen, Yongpeng Wu +4
Traditional asymptotic information-theoretic studies of the fundamental limits of wireless communication systems primarily rely on some ideal assumptions, such as infinite blocklen…
Unsourced Random Access in MIMO Quasi-Static Rayleigh Fading Channels: Finite Blocklength and Scaling Law Analyses
Junyuan Gao, Yongpeng Wu, Giuseppe Caire +3
This paper considers the unsourced random access (URA) problem with a random and unknown number of active users in multiple-input multiple-output (MIMO) quasi-static Rayleigh fadin…
Array-Fed RIS: Validation of Friis-Based Modeling Using Full-Wave Simulations
Krishan Kumar Tiwari, Thomas Flisgen, Wolfgang Heinrich +1
Space-fed large antenna arrays offer superior efficiency, simplicity, and reductions in size, weight, power, and cost (SWaP-C) compared to constrained-feed systems. Historically, h…
Flat-Top Beamforming with Efficient Array-Fed RIS
Krishan Kumar Tiwari, Giuseppe Caire
Flat-top beam designs are essential for uniform power distribution over a wide angular sector for applications such as 5G/6G networks, beaconing, satellite communications, radar sy…
A New Achievable Region of the -User MAC Wiretap Channel with Confidential and Open Messages Under Strong Secrecy
Hao Xu, Kai-Kit Wong, Giuseppe Caire
This paper investigates the achievable region of a -user discrete memoryless (DM) multiple access wiretap (MAC-WT) channel, where each user transmits both secret and open messag…
A Modular Pragmatic Architecture for Multiuser MIMO with Array-Fed RIS
Krishan Kumar Tiwari, Giuseppe Caire
We propose a power- and hardware-efficient, pragmatic, modular, multiuser/multibeam array-fed RIS architecture particularly suited to operate in very high frequency bands (high mmW…
Unsourced Random Access in MIMO Quasi-Static Rayleigh Fading Channels with Finite Blocklength
Junyuan Gao, Yongpeng Wu, Giuseppe Caire +2
This paper explores the fundamental limits of unsourced random access (URA) with a random and unknown number of active users in MIMO quasi-static Rayleigh fading chann…
Adapt or Wait: Quality Adaptation for Cache-aided Channels
Eleftherios Lampiris, Giuseppe Caire
This work focuses on quality adaptation as a means to counter the effects of channel degradation in wireless, cache-aided channels. We design a delivery scheme which combines coded…
User-Centric Cell-Free Wireless Networks for 6G: Communication Theoretic Models and Research Challenges
Fabian Göttsch, Giuseppe Caire, Wen Xu +1
This paper presents a comprehensive communication theoretic model for the physical layer of a cell-free user-centric network, formed by user equipments (UEs), radio units (RUs), an…
Ultra-Dense Cell-Free Massive MIMO for 6G: Technical Overview and Open Questions
Hien Quoc Ngo, Giovanni Interdonato, Erik G. Larsson +2
Ultra-dense cell-free massive multiple-input multiple-output (CF-MMIMO) has emerged as a promising technology expected to meet the future ubiquitous connectivity requirements and e…
A New Old Idea: Beam-Steering Reflectarrays for Efficient Sub-THz Multiuser MIMO
Krishan Kumar Tiwari, Giuseppe Caire
We present a novel, power- & hardware-efficient, multiuser, multibeam RIS (Reflective Intelligent Surface) architecture for multiuser MIMO, especially for very high frequency bands…
Joint Fronthaul Load Balancing and Computation Resource Allocation in Cell-Free User-Centric Massive MIMO Networks
Zhiyang Li, Fabian Göttsch, Siyao Li +2
We consider scalable cell-free massive multiple-input multiple-output networks under an open radio access network paradigm comprising user equipments (UEs), radio units (RUs), and…