402 citations · 1.7k across the 25 of their papers we have counts for
26 papers
CORDIS: A Scalable Coordinated Resource Allocation Framework for Distributed Cell-Free ISAC
Mehdi Zafari, Björn Ottersten, A. Lee Swindlehurst
Integrated Sensing and Communication (ISAC) is envisioned as a key technology for 6G wireless networks, enabling the joint use of spectrum and hardware for sensing and communicatio…
CoFAR Clutter Estimation using Covariance-Free Bayesian Learning
Kunwar Pritiraj Rajput, Bhavani Shankar M. R., Kumar Vijay Mishra +2
A cognitive fully adaptive radar (CoFAR) adapts its behavior on its own within a short period of time in response to changes in the target environment. For the CoFAR to function pr…
Space-Terrestrial Cooperation Over Spatially Correlated Channels Relying on Imperfect Channel Estimates: Uplink Performance Analysis and Optimization
Trinh Van Chien, Eva Lagunas, Tiep M. Hoang +3
A whole suite of innovative technologies and architectures have emerged in response to the rapid growth of wireless traffic. This paper studies an integrated network design that bo…
Massive MIMO Hybrid Precoding for LEO Satellite Communications With Twin-Resolution Phase Shifters and Nonlinear Power Amplifiers
Li You, Xiaoyu Qiang, Ke-Xin Li +4
The massive multiple-input multiple-output (MIMO) transmission technology has recently attracted much attention in the non-geostationary, e.g., low earth orbit (LEO) satellite comm…
Cooperative Hybrid Networks with Active Relays and RISs for B5G: Applications, Challenges, and Research Directions
Zaid Abdullah, Steven Kisseleff, Wallace Alves Martins +6
Among the recent advances and innovations in wireless technologies, reconfigurable intelligent surfaces (RISs) have received much attention and are envisioned to be one of the enab…
Beam Squint-Aware Integrated Sensing and Communications for Hybrid Massive MIMO LEO Satellite Systems
Li You, Xiaoyu Qiang, Christos G. Tsinos +4
The space-air-ground-sea integrated network (SAGSIN) plays an important role in offering global coverage. To improve the efficient utilization of spectral and hardware resources in…
Hybrid Analog/Digital Precoding for Downlink Massive MIMO LEO Satellite Communications
Li You, Xiaoyu Qiang, Ke-Xin Li +4
Massive multiple-input multiple-output (MIMO) is promising for low earth orbit (LEO) satellite communications due to the potential in enhancing the spectral efficiency. However, th…
Double-Phase-Shifter based Hybrid Beamforming for mmWave DFRC in the Presence of Extended Target and Clutters
Ziyang Cheng, Linlong Wu, Bowen Wang +2
In millimeter-wave (mmWave) dual-function radar-communication (DFRC) systems, hybrid beamforming (HBF) is recognized as a promising technique utilizing a limited number of radio fr…
Optimal Sensor Placement for Source Localization: A Unified ADMM Approach
Nitesh Sahu, Linlong Wu, Prabhu Babu +2
Source localization plays a key role in many applications including radar, wireless and underwater communications. Among various localization methods, the most popular ones are Tim…
Robust Congestion Control for Demand-Based Optimization in Precoded Multi-Beam High Throughput Satellite Communications
Van-Phuc Bui, Trinh Van Chien, Eva Lagunas +3
High-throughput satellite communication systems are growing in strategic importance thanks to their role in delivering broadband services to mobile platforms and residences and/or…
Resource Allocation in Heterogeneously-Distributed Joint Radar-Communications under Asynchronous Bayesian Tracking Framework
Linlong Wu, Kumar Vijay Mishra, Bhavani Shankar M. R. +1
Optimal allocation of shared resources is key to deliver the promise of jointly operating radar and communications systems. In this paper, unlike prior works which examine synergis…
Heterogeneously-Distributed Joint Radar Communications: Bayesian Resource Allocation
Linlong Wu, Kumar Vijay Mishra, Bhavani Shankar M. R. +1
Due to spectrum scarcity, the coexistence of radar and wireless communication has gained substantial research interest recently. Among many scenarios, the heterogeneouslydistribute…
On the Performance of One-Bit DoA Estimation via Sparse Linear Arrays
Saeid Sedighi, M. R. Bhavani Shankar, Mojtaba Soltanalian +1
Direction of Arrival (DoA) estimation using Sparse Linear Arrays (SLAs) has recently gained considerable attention in array processing thanks to their capability to provide enhance…
Downlink Transmit Design for Massive MIMO LEO Satellite Communications
Ke-Xin Li, Li You, Jiaheng Wang +4
This paper investigates the downlink (DL) transmit design for massive multiple-input multiple-output (MIMO) low-earth-orbit (LEO) satellite communication systems, where only the sl…
Localization with One-Bit Passive Radars in Narrowband Internet-of-Things using Multivariate Polynomial Optimization
Saeid Sedighi, Kumar Vijay Mishra, M. R. Bhavani Shankar +1
Several Internet-of-Things (IoT) applications provide location-based services, wherein it is critical to obtain accurate position estimates by aggregating information from individu…
A Family of Deep Learning Architectures for Channel Estimation and Hybrid Beamforming in Multi-Carrier mm-Wave Massive MIMO
Ahmet M. Elbir, Kumar Vijay Mishra, M. R. Bhavani Shankar +1
Hybrid analog and digital beamforming transceivers are instrumental in addressing the challenge of expensive hardware and high training overheads in the next generation millimeter-…
Resource Optimization with Load Coupling in Multi-cell NOMA
Lei You, Di Yuan, Lei Lei +3
Optimizing non-orthogonal multiple access (NOMA) in multi-cell scenarios is much more challenging than the single-cell case because inter-cell interference must be considered. Most…
On the Performance Analysis of Underlay Cognitive Radio Systems: A Deployment Perspective
Ankit Kaushik, Shree Krishna Sharma, Symeon Chatzinotas +2
We study the performance of cognitive Underlay System (US) that employ power control mechanism at the Secondary Transmitter (ST) from a deployment perspective. Existing baseline mo…
Frequency of Arrival-based Interference Localization Using a Single Satellite
Ashkan Kalantari, Sina Maleki, Symeon Chatzinotas +1
Intentional and unintentional interferences are an increasing threat for the satellite communications industry. In this paper, we aim to localize an interference with unknown locat…
Directional Modulation via Symbol-Level Precoding: A Way to Enhance Security
Ashkan Kalantari, Mojtaba Soltanalian, Sina Maleki +2
Wireless communication provides a wide coverage at the cost of exposing information to unintended users. As an information-theoretic paradigm, secrecy rate derives bounds for secur…
Distributed Coordinated Beamforming for Multi-cell Multigroup Multicast Systems
Harri Pennanen, Dimitrios Christopoulos, Symeon Chatzinotas +1
This paper considers coordinated multicast beamforming in a multi-cell wireless network. Each multiantenna base station (BS) serves multiple groups of single antenna users by gener…
Sensing-Throughput Tradeoff for Interweave Cognitive Radio System: A Deployment-Centric Viewpoint
Ankit Kaushik, Shree Krishna Sharma, Symeon Chatzinotas +2
Secondary access to the licensed spectrum is viable only if interference is avoided at the primary system. In this regard, different paradigms have been conceptualized in the exist…
Maximizing Energy Efficiency in Multiple Access Channels by Exploiting Packet Dropping and Transmitter Buffering
M. Majid Butt, Eduard A. Jorswieck, Bjorn Ottersten
Quality of service (QoS) for a network is characterized in terms of various parameters specifying packet delay and loss tolerance requirements for the application. The unpredictabl…
Weighted Fair Multicast Multigroup Beamforming under Per-antenna Power Constraints
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
A multi-antenna transmitter that conveys independent sets of common data to distinct groups of users is considered. This model is known as physical layer multicasting to multiple c…