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cs.IT2026
Feedback Capacity of Stationary Gaussian Channels: An Optimal Schalkwijk-Kailath Scheme
David Fay, Oron Sabag
We consider channels with additive colored Gaussian noise and noiseless feedback. Kim's seminal work derived a stationary variational characterization of feedback capacity and furt…
math.OC2026
Regret-Optimal Control for Finite-State Systems
Yishay Polatov, Oron Sabag
We study the control of finite-state systems driven by exogenous disturbances, and design causal policies that track the performance of a lookahead benchmark controller. This objec…
cs.IT2026
Directed Information: Estimation, Optimization and Applications in Communications and Causality
Dor Tsur, Oron Sabag, Navin Kashyap +2
Directed information (DI) is an information measure that attempts to capture directionality in the flow of information from one random process to another. It is closely related to…