Paper Accepted at ICUAS 2026

Tue, 21 Apr 2026 00:00:00 +0000

We are pleased to announce that our paper has been accepted at the 2026 International Conference on Unmanned Aircraft Systems (ICUAS):

Hardware-Aware SE(3) Control Barrier Functions for Counter-UAS Interceptors with Directed Energy Payloads

Evangelos Vlachos, Panayiotis Kolios, and Christos Skliros

This paper addresses the safety-critical control problem of keeping a directed-energy phased-array payload’s boresight aimed at a target UAS during high-speed interception. We develop SE(3) Control Barrier Functions that enforce a field-of-view constraint on the interceptor’s attitude while respecting the physical limits of the onboard hardware, solved efficiently via ADMM at high update rates.

This work is supported by the EU Horizon Europe project EUSOME (Grant Agreement No. 101187121).

Paper Submitted to IEEE Wireless Communications Letters

Thu, 02 Apr 2026 00:00:00 +0000

We submitted a new paper to IEEE Wireless Communications Letters:

Geometry-Aware Regularization for Deep-Unfolded MIMO-OTFS Detection

Nikolaos Ntavanelos and Evangelos Vlachos

MIMO-OTFS systems suffer from non-uniform scaling across symbol components due to spatial and fractional Doppler–Delay coupling. This work introduces a geometry-aware coordinate-wise regularizer within a deep-unfolded Conjugate Gradient detector to exploit this structure.

Key contributions:

Gram matrix analysis: We prove that all diagonal variation in the MIMO-OTFS Gram matrix arises exclusively from inter-path coupling, analytically characterizing its non-uniform structure.
Deep-unfolded CG detector: A geometry-aware regularizer is embedded directly into the CG linear system, with per-component weights learned in a data-driven manner.
Robust performance: The proposed detector outperforms low-complexity baselines and approaches heavier neural architectures at medium-to-high SNR under both low- and high-mobility scenarios.

Paper | Δρ. Ευάγγελος Βλάχος

Paper Accepted at ICUAS 2026

Hardware-Aware SE(3) Control Barrier Functions for Counter-UAS Interceptors with Directed Energy Payloads

Paper Submitted to IEEE Wireless Communications Letters

Geometry-Aware Regularization for Deep-Unfolded MIMO-OTFS Detection