ultra-massive MIMO for future cell-free heterogeneous networks

Leistungen

Training & mobility report - initial version

Monitoring and evaluation of the local and network-wide training.This is the initial version. Updates in M24, M36, M48.

Reference scenarios

Reference scenarios and architectures

Channel models - initial

UmMIMO channel models for Mid-band frequenciesUpdated on M40

Training & mobility report - intermediate version

Monitoring and evaluation of the local and network-wide training.This is an intermediate version. Updates in M36, M48.

KPIs

KPIs and requirements

Positioning and sensing algorithms - initial version

Algorithms to improve the sensing and positioning up to cm-level accuracy.Updated on M43.

RRM and scheduling - initial version

RRM scheduling and protocols for communications and sensing.Updated on M41.

Waveforms - initial version

Waveforms and frame structure to allow simultaneous communication and sensing.Updated on M42.

AI procedures and protocols - initial version

AI techniques and protocols to improve communications and sensing.Updated on M45.

Veröffentlichungen

Failure Tolerant Phase-Only Indoor Positioning via Deep Learning

Autoren: Fatih Ayten, Mehmet C. Ilter, Akshay Jain, Ossi Kaltiokallio, Jukka Talvitie, Elena Simona Lohan, Henk Wymeersch, Mikko Valkama
Veröffentlicht in: 2025 IEEE 36th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2025
Herausgeber: IEEE
DOI: 10.1109/PIMRC62392.2025.11274977

3D Indoor Positioning Techniques for mmWave Distributed MIMO Systems Under Multipath Propagation

Autoren: Mohd Adnan, Adao Silva, Rui Dinis, Lukasz Krzymien
Veröffentlicht in: 2026 15th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP), 2026
Herausgeber: IEEE
DOI: 10.1109/CSNDSP68462.2026.11654498

Extracting Situational Awareness in 6G Cellular Systems: Robust EKF-SLAM Approach

Autoren: Ariele Sapienza, Ossi Kaltiokallio, Jukka Talvitie, Fathia Ben Slama, Elena Simona Lohan, Mikko Valkama
Veröffentlicht in: 2025 59th Asilomar Conference on Signals, Systems, and Computers, 2026
Herausgeber: IEEE
DOI: 10.1109/IEEECONF67917.2025.11443751

Phase-Only Positioning: Overcoming Integer Ambiguity Challenge through Deep Learning

Autoren: Fatih Ayten, Mehmet C. Ilter, Ossi Kaltiokallio, Jukka Talvitie, Akshay Jain, Elena Simona Lohan, Henk Wymeersch, Mikko Valkama
Veröffentlicht in: 2025 IEEE 36th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2025
Herausgeber: IEEE
DOI: 10.1109/PIMRC62392.2025.11275391

An Empirical Wideband Performance Analysis of mmWave Passive RIS and Reflectors

Autoren: João Ferreira, Ansgar Leßmann, Carles Navarro Manchón, Dominique Schreurs
Veröffentlicht in: 2025 IEEE 36th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2025
Herausgeber: IEEE
DOI: 10.1109/PIMRC62392.2025.11275147

Phase-Only Positioning in Distributed MIMO Under Phase Impairments: AP Selection Using Deep Learning

Autoren: Fatih Ayten, Musa Furkan Keskin, Akshay Jain, Mehmet C. Ilter, Ossi Kaltiokallio, Jukka Talvitie, Elena Simona Lohan, Mikko Valkama
Veröffentlicht in: ICASSP 2026 - 2026 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2026
Herausgeber: IEEE
DOI: 10.1109/ICASSP55912.2026.11464569

Advanced Channel Decomposition Techniques in OTFS: A GSVD Approach for Multi-User Downlink

Autoren: Omid Abbassi Aghda, Oussama Ben Haj Belkacem, Dou Hu, João Guerreiro, Nuno Souto, Michal Szczachor, Rui Dinis
Veröffentlicht in: 2025 IEEE 101st Vehicular Technology Conference (VTC2025-Spring), 2025
Herausgeber: IEEE
DOI: 10.1109/VTC2025-SPRING65109.2025.11174623

GSVD-Based Uplink Channel Diagonalization in OTFS for Multi-User Systems

Autoren: Omid Abbassi Aghda (corresponding author); Oussama Ben Haj Belkacem; João Guerreiro; Nuno Souto; Michal Szczachor; Rui Dinis
Veröffentlicht in: 2025
Herausgeber: WIPHAL 2025

Robust Channel Estimation in OTFS Systems Using Embedded Pilots and DFT-Based Interpolation

Autoren: Andrés Reyes-Castro, Lianet Méndez-Monsanto, María Julia Fernández-Getino García, Ana García Armada, Kun Chen-Hu
Veröffentlicht in: 2026 15th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP), 2026
Herausgeber: IEEE
DOI: 10.1109/CSNDSP68462.2026.11654403

A Survey on User Positioning in mmWave MIMO System

Autoren: Mohd Adnan, Adao Silva, Rui Dinis, and Lukasz Krzymien
Veröffentlicht in: International Conference on Localization and GNSS 2025, 2025
Herausgeber: International Conference on Localization and GNSS 2025

Neural Network-Integrated Multistatic Sensing for Joint Angle Estimation in Cell-Free JCAS Systems

Autoren: Fatih Ayten, Mehmet C. Ilter, Akshay Jain, Elena Simona Lohan, Mikko Valkama
Veröffentlicht in: 2025 IEEE 5th International Symposium on Joint Communications &amp; Sensing (JC&amp;S), 2025
Herausgeber: IEEE
DOI: 10.1109/JCS64661.2025.10880641

Clutter Suppression in Bistatic ISAC with Joint Angle and Doppler Estimation

Autoren: M. Ertug Pihtili, Julia Equi, Ossi Kaltiokallio, Jukka Talvitie, Elena Simona Lohan, Ertugrul Basar, Mikko Valkama
Veröffentlicht in: 2025 IEEE 36th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2025
Herausgeber: IEEE
DOI: 10.1109/PIMRC62392.2025.11275173

A Low PAPR Page-Style Multi-User OTFS Modulation

Autoren: Dou Hu, Jin Nakazato, Kazuki Maruta, Omid Abbassi, Rui Dinis, Manabu Tsukada
Veröffentlicht in: 2025 IEEE 101st Vehicular Technology Conference (VTC2025-Spring), 2025
Herausgeber: IEEE
DOI: 10.1109/VTC2025-SPRING65109.2025.11174714

Impact of Preprocessing on Neural Network-Based RSS/AoA Positioning

Autoren: Omid Abbassi Aghda, Slavisa Tomic, Oussama Ben Haj Belkacem, Joao Guerreiro, Nuno Souto, Michal Szczachor, Rui Dinis
Veröffentlicht in: 2026
Herausgeber: IEEE Vehicular Technology Society

Partial Relaxation for Near-Field Channel Parameter Estimation: Algorithms and Cramér–Rao Bounds

Autoren: Mohammad Abu Aqoulah, Doğa Gürgünoğlu, Gábor Fodor, Gonzalo Seco-Granados
Veröffentlicht in: 2026 IEEE International Conference on Communications Workshops (ICC Workshops), 2026
Herausgeber: IEEE
DOI: 10.1109/ICCWORKSHOPS63917.2026.11586610

Gaussian Process-Based Extended Object Estimation for 6G ISAC at Millimeter-Wave Frequencies

Autoren: M. Ertug Pihtili, Ossi Kaltiokallio, Julia Equi, Jukka Talvitie, Elena Simona Lohan, Ertugrul Basar, Mikko Valkama
Veröffentlicht in: 2026 20th European Conference on Antennas and Propagation (EuCAP), 2026
Herausgeber: IEEE
DOI: 10.23919/EUCAP68105.2026.11612520

Noncoherent MIMO Communications: Theoretical Foundation, Design Approaches, and Future Challenges

Autoren: Khac-Hoang Ngo, Diego Cuevas, Ruben De Miguel Gil, Victor Monzon Baeza, Ana Garcia Armada, Ignacio Santamaria
Veröffentlicht in: IEEE Open Journal of Vehicular Technology, Ausgabe 7, 2026, ISSN 2644-1330
Herausgeber: Institute of Electrical and Electronics Engineers (IEEE)
DOI: 10.1109/OJVT.2025.3649122

A Survey on Positioning for mmWave Distributed MIMO Systems: Challenges, Solution Techniques, and Applications

Autoren: Mohd Adnan, Adão Silva, Lukasz Krzymien, Rui Dinis
Veröffentlicht in: IEEE Access, Ausgabe 13, 2026, ISSN 2169-3536
Herausgeber: Institute of Electrical and Electronics Engineers (IEEE)
DOI: 10.1109/ACCESS.2025.3638143

Superimposed Sunscape Pilot Pattern for Channel Estimation in OTFS-Based ISAC

Autoren: Lianet Méndez-Monsanto, Andrés Reyes-Castro, Kun Chen-Hu, María Julia Fernández-Getino García, Ana García Armada
Veröffentlicht in: IEEE Transactions on Wireless Communications, Ausgabe 25, 2026, ISSN 1536-1276
Herausgeber: Institute of Electrical and Electronics Engineers (IEEE)
DOI: 10.1109/TWC.2026.3689779

A Non-Coherent Distributed Massive Multi Antenna System Under Rician Propagation

Autoren: Inigo Bilbao, Eneko Iradier, Jon Montalban, Pablo Angueira, Ruben de Miguel Gil, Ana Garcia Armada
Veröffentlicht in: IEEE Open Journal of Vehicular Technology, Ausgabe 7, 2026, ISSN 2644-1330
Herausgeber: Institute of Electrical and Electronics Engineers (IEEE)
DOI: 10.1109/OJVT.2026.3725344

A&M based fractional delay and Doppler channel estimation in OTFS

Autoren: Omid Abbassi Aghda, Oussama Ben Haj Belkacem, Nikolajs Tihomorskis, João Guerreiro, Nuno Souto, Michal Szczachor, Rui Dinis
Veröffentlicht in: npj Wireless Technology, Ausgabe 2, 2026, ISSN 3059-4391
Herausgeber: Springer Science and Business Media LLC
DOI: 10.1038/S44459-026-00055-W

OTFS Channel Estimation for ISAC via Superimposed Zadoff-Chu Pilot Sequence

Autoren: Lianet Méndez-Monsanto, Andrés Reyes-Castro, Kun Chen-Hu, María Julia Fernández-Getino García, Ana García Armada
Veröffentlicht in: 2025 IEEE International Mediterranean Conference on Communications and Networking (MeditCom), 2025
Herausgeber: IEEE
DOI: 10.1109/MEDITCOM64437.2025.11104454

Software-Defined Radio Experimental Validation of an OTFS-Based ISAC for Velocity Estimation in an ARoF Setup

Autoren: Nikolajs Tihomorskis, Sandis Migla, Omid Abbassi Aghda, Kristaps Rubuls, Niks Krumins, Olesja Novikova, Janis Braunfelds, Sandis Spolitis, Oskars Ozolins, Arturs Aboltins
Veröffentlicht in: Technologies, Ausgabe 14, 2026, ISSN 2227-7080
Herausgeber: MDPI AG
DOI: 10.3390/TECHNOLOGIES14050262

Projektergebnisse

Leistungen

Veröffentlichungen

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