Search Results for author: Athina P. Petropulu

Found 10 papers, 0 papers with code

Widely Separated MIMO Radar Using Matrix Completion

no code implementations29 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.

Matrix Completion

Deep Reinforcement Learning for IRS Phase Shift Design in Spatiotemporally Correlated Environments

no code implementations2 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.

reinforcement-learning Reinforcement Learning (RL)

Seventy Years of Radar and Communications: The Road from Separation to Integration

no code implementations2 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.

DFRC with Improved Communication-Sensing Trade-off via Private Subcarrier Permutations and Pairing with Antennas

no code implementations19 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.

Phased Array With Improved Beamforming Capability via Use of Double Phase Shifters

no code implementations14 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).

Physical Layer Anonymous Precoding: The Path to Privacy-Preserving Communications

no code implementations18 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.

Cloud Computing Privacy Preserving

Towards Multi-Functional 6G Wireless Networks: Integrating Sensing, Communication and Security

no code implementations16 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.

Cooperative Beamforming with Predictive Relay Selection for Urban mmWave Communications

no code implementations29 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.

Grid Based Nonlinear Filtering Revisited: Recursive Estimation & Asymptotic Optimality

no code implementations10 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.

Quantization

Uniform {\varepsilon}-Stability of Distributed Nonlinear Filtering over DNAs: Gaussian-Finite HMMs

no code implementations16 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.

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