725 citations · 3k across the 227 of their papers we have counts for
9 papers · 1 filter
Reconfigurable Intelligent Surfaces for Energy Efficiency in Wireless Communication
Chongwen Huang, Alessio Zappone, George C. Alexandropoulos +2
The adoption of a Reconfigurable Intelligent Surface (RIS) for downlink multi-user communication from a multi-antenna base station is investigated in this paper. We develop energy-…
Full-Duplex Transmission Optimization for Bi-directional MIMO links with QoS Guarantees
Hiroki Iimori, Giuseppe Abreu, George C. Alexandropoulos
We consider a bi-directional Full-Duplex (FD) Multiple-Input Multiple-Output (MIMO) communication system in which nodes are capable of performing transitter (TX)- Receiver (RX) dig…
Low Complexity Full Duplex MIMO: Novel Analog Cancellation Architectures and Transceiver Design
George C. Alexandropoulos, Melissa Duarte
Incorporating full duplex operation in Multiple Input Multiple Output (MIMO) systems provides the potential of boosting throughput performance. However, the hardware complexity of…
Energy Efficient Multi-User MISO Communication using Low Resolution Large Intelligent Surfaces
Chongwen Huang, George C. Alexandropoulos, Alessio Zappone +2
We consider a multi-user Multiple-Input Single-Output (MISO) communication system comprising of a multi-antenna base station communicating in the downlink simultaneously with multi…
Massive MIMO Channel Estimation for Millimeter Wave Systems via Matrix Completion
Evangelos Vlachos, George C. Alexandropoulos, John Thompson
Millimeter Wave (mmWave) massive Multiple Input Multiple Output (MIMO) systems realizing directive beamforming require reliable estimation of the wireless propagation channel. Howe…
Hybrid Processing Design for Multipair Massive MIMO Relaying with Channel Spatial Correlation
Milad Fozooni, Hien Quoc Ngo, Michail Matthaiou +2
Massive multiple-input multiple-output (MIMO) avails of simple transceiver design which can tackle many drawbacks of relay systems in terms of complicated signal processing, latenc…
Energy Sustainable IoT with Individual QoS Constraints Through MISO SWIPT Multicasting
Deepak Mishra, George C. Alexandropoulos, Swades De
Enabling technologies for energy sustainable Internet of Things (IoT) are of paramount importance since the proliferation of high data communication demands of low power network de…
Transmit Precoding and Receive Power Splitting for Harvested Power Maximization in MIMO SWIPT Systems
Deepak Mishra, George C. Alexandropoulos
We consider the problem of maximizing the harvested power in Multiple Input Multiple Output (MIMO) Simultaneous Wireless Information and Power Transfer (SWIPT) systems with power s…
MIMO Underlay Cognitive Radio: Optimized Power Allocation, Effective Number of Transmit Antennas and Harvest-Transmit Tradeoff
Nikolaos I. Miridakis, Theodoros A. Tsiftsis, George C. Alexandropoulos
In this paper, the performance of an underlay multiple-input multiple-output (MIMO) cognitive radio system is analytically studied. In particular, the secondary transmitter operate…