376 citations · 4.1k across the 391 of their papers we have counts for
16 papers · 1 filter
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…
Centralized Power Control in Cognitive Radio Networks Using Modulation and Coding Classification Feedback
Anestis Tsakmalis, Symeon Chatzinotas, Björn Ottersten
In this paper, a centralized Power Control (PC) scheme and an interference channel learning method are jointly tackled to allow a Cognitive Radio Network (CRN) access to the freque…
Performance Analysis of Underlay Cognitive Radio Systems: Estimation-Throughput Tradeoff
Ankit Kaushik, Shree Krishna Sharma, Symeon Chatzinotas +2
In this letter, we study the performance of cognitive Underlay Systems (USs) that employ power control mechanism at the Secondary Transmitter (ST). Existing baseline models conside…
Impact of Transceiver Impairments on the Capacity of Dual-Hop Relay Massive MIMO Systems
Anastasios K. Papazafeiropoulos, Shree Krishna Sharma, Symeon Chatzinotas
Despite the deleterious effect of hardware impairments on communication systems, most prior works have not investigated their impact on widely used relay systems. Most importantly,…
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…
Precoding in Multibeam Satellite Communications: Present and Future Challenges
Miguel Ángel Vázquez, Ana Pérez-Neira, Dimitrios Christopoulos +5
Whenever multibeam satellite systems target very aggressive frequency reuse in their coverage area, inter-beam interference becomes the major obstacle for increasing the overall sy…