no code implementations • 29 Aug 2023 • Shunqiao Sun, Yunqiao Hu, Kumar Vijay Mishra, Athina P. Petropulu
We present a low-complexity widely separated multiple-input-multiple-output (WS-MIMO) radar that samples the signals at each of its multiple receivers at reduced rates.
no code implementations • 2 Nov 2022 • Spilios Evmorfos, Athina P. Petropulu, H. Vincent Poor
We propose a deep actor-critic algorithm that accounts for channel correlations and destination motion by constructing the state representation to include the current position of the receiver and the phase shift values and receiver positions that correspond to a window of previous time steps.
no code implementations • 2 Oct 2022 • Fan Liu, Le Zheng, Yuanhao Cui, Christos Masouros, Athina P. Petropulu, Hugh Griffiths, Yonina C. Eldar
Radar and communications (R&C) as key utilities of electromagnetic (EM) waves have fundamentally shaped human society and triggered the modern information age.
no code implementations • 19 Apr 2022 • Zhaoyi Xu, Athina P. Petropulu
We propose to exploit the permutation of private subcarriers among the available subcarriers and the pairing between active antennas and private subcarriers to recover some of the communication rate loss.
no code implementations • 14 Apr 2022 • Zhaoyi Xu, Athina P. Petropulu
In this paper we propose a novel way to improve the beamforming capability of PESA by endowing it with more degrees of freedom via the use of double phase shifters (DPS).
no code implementations • 18 Sep 2021 • Zhongxiang Wei, Christos Masouros, H. Vincent Poor, Athina P. Petropulu, Lajos Hanzo
In contrast to traditional security and privacy designs that aim to prevent confidential information from being eavesdropped upon by adversaries, or learned by unauthorized parties, in this paper we consider designs that mask the users' identities during communication, hence resulting in anonymous communications.
no code implementations • 16 Jul 2021 • Zhongxiang Wei, Fan Liu, Christos Masouros, Nanchi Su, Athina P. Petropulu
At the same time, the sensing capability incorporated in the ISAC transmission offers unique opportunities to design secure ISAC techniques.
no code implementations • 29 Jul 2019 • Anastasios Dimas, Dionysios S. Kalogerias, Athina P. Petropulu
To meet the quality-of-service guarantees of the network, a key prerequisite for beamforming is relay selection.
no code implementations • 10 Apr 2016 • Dionysios S. Kalogerias, Athina P. Petropulu
We revisit the development of grid based recursive approximate filtering of general Markov processes in discrete time, partially observed in conditionally Gaussian noise.
no code implementations • 16 Feb 2016 • Dionysios S. Kalogerias, Athina P. Petropulu
In this work, we study stability of distributed filtering of Markov chains with finite state space, partially observed in conditionally Gaussian noise.