81 citations · 175 across the 31 of their papers we have counts for
7 papers · 1 filter
Model-Free Learning of Two-Stage Beamformers for Passive IRS-Aided Network Design
Hassaan Hashmi, Spyridon Pougkakiotis, Dionysios S. Kalogerias
Electronically tunable metasurfaces, or Intelligent Reflective Surfaces (IRSs), are a popular technology for achieving high spectral efficiency in modern wireless systems by shapin…
Risk-Aware Stability of Discrete-Time Systems
Margaret P. Chapman, Dionysios S. Kalogerias
We develop a generalized stability framework for stochastic discrete-time systems, where the generality pertains to the ways in which the distribution of the state energy can be ch…
Model-Free Learning of Optimal Beamformers for Passive IRS-Assisted Sumrate Maximization
Hassaan Hashmi, Spyridon Pougkakiotis, Dionysios S. Kalogerias
Although Intelligent Reflective Surfaces (IRSs) are a cost-effective technology promising high spectral efficiency in future wireless networks, obtaining optimal IRS beamformers is…
Model-Free Learning of Optimal Deterministic Resource Allocations in Wireless Systems via Action-Space Exploration
Hassaan Hashmi, Dionysios S. Kalogerias
Wireless systems resource allocation refers to perpetual and challenging nonconvex constrained optimization tasks, which are especially timely in modern communications and networki…
Risk-Constrained Linear-Quadratic Regulators
Anastasios Tsiamis, Dionysios S. Kalogerias, Luiz F. O. Chamon +2
We propose a new risk-constrained reformulation of the standard Linear Quadratic Regulator (LQR) problem. Our framework is motivated by the fact that the classical (risk-neutral) L…
Model-Free Learning of Optimal Ergodic Policies in Wireless Systems
Dionysios S. Kalogerias, Mark Eisen, George J. Pappas +1
Learning optimal resource allocation policies in wireless systems can be effectively achieved by formulating finite dimensional constrained programs which depend on system configur…
Mobile Beamforming & Spatially Controlled Relay Communications
Dionysios S. Kalogerias, Athina P. Petropulu
We consider stochastic motion planning in single-source single-destination robotic relay networks, under a cooperative beamforming framework. Assuming that the communication medium…