376 citations · 4.1k across the 391 of their papers we have counts for
10 papers · 2 filters
Large System Analysis for Amplify & Forward SIMO Multiple Access Channel with Ill-conditioned Second Hop
Symeon Chatzinotas
Relaying has been extensively studied during the last decades and has found numerous applications in wireless communications. The simplest relaying method, namely amplify and forwa…
Constructive Multiuser Interference in Symbol Level Precoding for the MISO Downlink Channel
Maha Alodeh, Symeon Chatzinotas, Björn Ottersten
This paper investigates the problem of interference among the simultaneous multiuser transmissions in the downlink of multiple antennas systems. Using symbol level precoding, a new…
Sum Rate Maximizing Multigroup Multicast 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 herein considered, a model known as physical layer multicasting to multiple…
Multicast Multigroup Beamforming under Per-antenna Power Constraints
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
Linear precoding exploits the spatial degrees of freedom offered by multi-antenna transmitters to serve multiple users over the same frequency resources. The present work focuses o…
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…
Multicast Multigroup Precoding and User Scheduling for Frame-Based Satellite Communications
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
The present work focuses on the forward link of a broadband multibeam satellite system that aggressively reuses the user link frequency resources. Two fundamental practical challen…
Frame Based Precoding in Satellite Communications: A Multicast Approach
Dimitrios Christopoulos, Symeon Chatzinotas, Bjorn Ottersten
In the present work, a multibeam satellite that employs aggressive frequency reuse towards increasing the offered throughput is considered. Focusing on the forward link, the goal i…
Joint Power Control in Wiretap Interference Channels
Ashkan Kalantari, Sina Maleki, Gan Zheng +2
Interference in wireless networks degrades the signal quality at the terminals. However, it can potentially enhance the secrecy rate. This paper investigates the secrecy rate in a…
Spatial DCT-Based Channel Estimation in Multi-Antenna Multi-Cell Interference Channels
Maha Alodeh, Symeon Chatzinotas, Bjorn Ottersten
This work addresses channel estimation in multiple antenna multicell interference-limited networks. Channel state information (CSI) acquisition is vital for interference mitigation…
A Multicast Approach for Constructive Interference Precoding in MISO Downlink Channel
Maha Alodeh, Symeon Chatzinotas, Bjorn Ottersten
This paper studies the concept of jointly utilizing the data information(DI)and channel state information (CSI) in order to design symbol-level precoders for a multiple input and s…