10 papers
Jacobi Elliptic Chirps for Sub-Nyquist Multi-Target Ranging
Dimitrios Bozanis, Thrassos K. Oikonomou, Sotiris A. Tegos +2
Sub-Nyquist sampling is an attractive way to reduce the hardware cost of wideband pulse-compression radar, but it introduces coherent alias-induced replicas in the matched-filter r…
Elliptic Range-Doppler Mapping for OFDM-ISAC under IQ Imbalance
Thrassos K. Oikonomou, Dimitrios Bozanis, Sotiris A. Tegos +2
Receiver in-phase/quadrature imbalance (IQI) couples each OFDM subcarrier with its mirror counterpart, creating ghost targets and degrading range-Doppler recovery in orthogonal fre…
Constellation Design for Robust Interference Mitigation
Athanasios T. Papadopoulos, Thrassos K. Oikonomou, Dimitrios Tyrovolas +4
This paper investigates symbol detection for single-carrier communication systems operating in the presence of additive interference with Nakagami-m statistics. Such interference d…
Viterbi State Selection for Discrete Pinching Antenna Systems
Victoria E. Galanopoulou, Thrassos K. Oikonomou, Odysseas G. Karagiannidis +2
Pinching antennas enable dynamic control of electromagnetic wave propagation through reconfigurable radiating structures, but selecting an optimal subset of antennas remains a comb…
Constellation Design and Detection under Generalized Hardware Impairments
Thrassos K. Oikonomou, Dimitrios Tyrovolas, Sotiris A. Tegos +3
This paper presents a maximum-likelihood detection framework that jointly mitigates hardware (HW) impairments in both amplitude and phase. By modeling transceiver distortions as re…
OFDMA for Pinching Antenna Systems
Thrassos K. Oikonomou, Sotiris A. Tegos, Panagiotis D. Diamantoulakis +2
Pinching-antenna (PA) systems route millimeter wave (mmWave) signals through a leaky waveguide and radiate them at "pinch" apertures, offering low-cost line-of-sight (LoS) coverage…
Elliptic Curve Modulation (ECM) for Extremely Robust Physical Layer Encryption
Thrassos K. Oikonomou, George K. Karagiannidis
This paper introduces Elliptic Curve Modulation (ECM), a novel modulation scheme that can be leveraged to effectively shuffle transmitted data while maintaining symbol error probab…
Cross-Band Modulation Design for Hybrid RF-Optical Systems
Thrassos K. Oikonomou, Sotiris A. Tegos, Panagiotis D. Diamantoulakis +1
We present a novel cross-band modulation framework that combines 3D modulation in the RF domain with intensity modulation and direct detection in the optical domain, the first such…
On the Design of Super Constellations
Thrassos K. Oikonomou, Dimitrios Tyrovolas, Sotiris A. Tegos +3
In the evolving landscape of sixth-generation (6G) wireless networks, which demand ultra high data rates, this study introduces the concept of super constellation communications. A…
On the Performance of RIS-assisted Networks with HQAM
Thrassos K. Oikonomou, Dimitrios Tyrovolas, Sotiris A. Tegos +4
In this paper, we investigate the application of hexagonal quadrature amplitude modulation (HQAM) in reconfigurable intelligent surface (RIS)-assisted networks, specifically focusi…