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Professor Holger Claussen
Professor of Wireless Communications, Electronic & Elect. Engineering

Biography

Prof. Holger Claussen is Head of the Wireless Communications Laboratory at Tyndall National Institute, and Professor of Wireless Communications at University College Cork and Trinity College Dublin. At Tyndall, he is building up research teams in the area of RF, Access, Protocols, AI, and Quantum Systems to invent the future of Wireless Communications. Previously he led the Wireless Communications Research Department of Nokia Bell Labs located in Ireland and the US until 2020. In this role, he and his team innovated in all areas related to future evolution, deployment, and operation of wireless networks to enable exponential growth in mobile data traffic and reliable low latency communications. His research in this domain has been commercialised in Nokia's (formerly Alcatel-Lucent's) Small Cell product portfolio and continues to have significant impact. He received the 2014 World Technology Award in the individual category Communications Technologies for innovative work of "the greatest likely long-term significance". Holger received his Ph.D. degree in signal processing for digital communications from the University of Edinburgh, United Kingdom in 2004. He is author of the book "Small Cell Networks", more than 140 journal and conference publications, 89 granted patent families, and 37 filed patent applications pending. He is Member of the Royal Irish Academy, Fellow of the IEEE, and Fellow of Trinity College Dublin.

Publications and Further Research Outputs

Peer-Reviewed Publications

Boris Galkin, Lester Ho, Paul Brophy, Holger Claussen, Experimental Evaluation of a Low-Cost UAV-based System For Locating Ground Transmitters, 2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall), 2024 Conference Paper, 2024 DOI

Ciara McDonald, Holger Claussen, Ronan Farrell, John Dooley, FPGA implementation of a sub-400ns 6G free-space optical wireless communications transmitter, Optics Express, 2023 Journal Article, 2023 DOI

Boris Galkin, Lester Ho, Ken Lyons, Gokhan Celik, Holger Claussen, Experimental Evaluation of Air-to-Ground VHF Band Communication for UAV Relays, 2023 IEEE International Conference on Communications Workshops (ICC Workshops), 2023 Conference Paper, 2023 DOI

Md. Noor-A-Rahim, Fadhil Firyaguna, Jobish John, M. Omar Khyam, Dirk Pesch, Eddie Armstrong, Holger Claussen, H. Vincent Poor, Toward Industry 5.0: Intelligent Reflecting Surface in Smart Manufacturing, IEEE Communications Magazine, 60, (10), 2022, p72--78 Journal Article, 2022 DOI

Senad Bulja, Rose Kopf, Al Tate, Mark Cappuzzo, Dmitry Kozlov, Holger Claussen, Dirk Wiegner, Wolfgang Templ, Dariush Mirshekar-Syahkal, High frequency resistive switching behavior of amorphous TiO2 and NiO, Scientific Reports, 12, (1), 2022 Journal Article, 2022 DOI

Khoi Khac Nguyen, Trung Q. Duong, Tan Do-Duy, Holger Claussen, Lajos Hanzo, 3D UAV Trajectory and Data Collection Optimisation Via Deep Reinforcement Learning, IEEE Transactions on Communications, 70, (4), 2022, p2358--2371 Journal Article, 2022 DOI

Traian E. Abrudan, Stepan Kucera, Holger Claussen, Unitary checkerboard precoded OFDM for low-PAPR optical wireless communications, Journal of Optical Communications and Networking, 14, (4), 2022, p153 Journal Article, 2022 DOI

Thuy M. Pham, Ronan Farrell, Holger Claussen, Mark F. Flanagan, Le-Nam Tran, On the MIMO Capacity With Joint Sum and Per-Antenna Power Constraints: A New Efficient Numerical Method, IEEE Transactions on Vehicular Technology, 2022 Journal Article, 2022 DOI

Senad Bulja, Holger Claussen, Dmitry Kozlov, Irina Munina, Pavel Turalchuk, Ceramic"elements"based distributed resonators and filters, Electronics Letters, 58, (3), 2021, p109--111 Journal Article, 2021 DOI

Kariem Fahmi and Douglas Leith and Stepan Kucera and Holger Claussen, BOOST: Transport-Layer Multi-Connectivity Solution for Multi-Wan Routers, 2021 19th Mediterranean Communication and Computer Networking Conference (MedComNet), 2021 Journal Article, 2021 DOI

Kariem Fahmi and Douglas Leith and Stepan Kucera and Holger Claussen, Understanding MPTCP in Multi-WAN Routers: Measurements and System Design, 2021 IEEE 46th Conference on Local Computer Networks (LCN), 2021 Journal Article, 2021 DOI

Federico Chiariotti, Andrea Zanella, Stepan Kucera, Kariem Fahmi, Holger Claussen, The HOP Protocol: Reliable Latency-Bounded End-to-End Multipath Communication, IEEE/ACM Transactions on Networking, 29, (5), 2021, p2281--2295 Journal Article, 2021 DOI

Tan Do-Duy, Long D. Nguyen, Trung Q. Duong, Saeed Khosravirad, Holger Claussen, Joint Optimisation of Real-time Deployment and Resource Allocation for UAV-Aided Disaster Emergency Communications, IEEE Journal on Selected Areas in Communications, 2021, p1--1 Journal Article, 2021 DOI

Federico Chiariotti, Andrea Zanella, Stepan Kucera, Holger Claussen, BBR-S: A Low-Latency BBR Modification for Fast-Varying Connections, IEEE Access, 9, 2021, p76364--76378 Journal Article, 2021 DOI

Basaras, P. and Kucera, S. and Claussen, H. and Iosifidis, G., Energy-aware Multi-RAT Multicast Video Delivery, (9321976), 2020 Conference Paper, 2020 DOI

Index in, editor(s)Dorman, CJ , Structure and Function of the Bacterial Genome, Hoboken, NJ, USA, John Wiley and Sons, 2020, pp379 - 395, [Dorman, CJ] Book Chapter, 2020 URL DOI

Basaras, P. and Kucera, S. and Claussen, H. and Iosifidis, G., Multi-RAT multicast 360° video delivery, 2020-January, (9347954), 2020 Conference Paper, 2020 DOI

Basaras, P. and Kucera, S. and Fahmi, K. and Claussen, H. and Iosifidis, G., Demo: Seamless mobile video streaming in multicast multi-RAT communications, (9163005), 2020, pp1280-1281 Conference Paper, 2020 DOI

Basaras, P. and Iosifidis, G. and Kucera, S. and Claussen, H., Multicast Optimization for Video Delivery in Multi-RAT Networks, IEEE Transactions on Communications, 68, (8), 2020, p4973-4985 Journal Article, 2020 DOI

Fahmi, Kariem, Leith, Douglas J., Kucera, Stepan, Claussen, Holger, SOS: Stochastic Object-aware Scheduler for low delay communication over multiple wireless paths, ICC, IEEE, 2020 Conference Paper, 2020 DOI

J. Kibilda, A. MacKenzie, M. Abdel-Rahman, S.K. Yoo, L. Galati Giordano, S. Cotton, N. Marchetti, W. Saad, W. Scanlon, A. Garcia-Rodriguez, D. Lopez-Perez, H. Claussen L. DaSilva, Indoor Millimeter-Wave Systems: Design and Performance Evaluation, Proceedings of the IEEE, 108, (6), 2020, p923-944 Journal Article, 2020 DOI

Ai, B. and Molisch, A.F. and Rupp, M. and Zhong, Z.-D. and Zhang, X.-Y. and Liu, C.-L. and Suen, C.Y. and Kibilda, J. and MacKenzie, A.B. and Abdel-Rahman, M.J. and Yoo, S.K. and Giordano, L.G. and Cotton, S.L. and Marchetti, N. and Saad, W. and Scanlon, W.G. and Garcia-Rodriguez, A. and Lopez-Perez, D. and Claussen, H. and Dasilva, L.A. and Tan, H.Z. and Choi, S. and Lau, F.W.Y. and Abnousi, F., Scanning the Issue, Proceedings of the IEEE, 108, (6), 2020, p854-855 Journal Article, 2020 DOI

Takfarinas Saber, David Fagan, David Lynch, Stepan Kucera, Holger Claussen, Michael O"Neill, A multi-level grammar approach to grammar-guided genetic programming: the case of scheduling in heterogeneous networks, Genetic Programming and Evolvable Machines, 20, (2), 2019, p245--283 Journal Article, 2019 DOI

Dong Fang, Yu-Chih Huang, Giovanni Geraci, Zhiguo Ding, Holger Claussen, Enhanced Multiuser Superposition Transmission Through Structured Modulation, IEEE Transactions on Wireless Communications, 18, (5), 2019, p2765--2776 Journal Article, 2019 DOI

Anna Zakrzewska, David Lopez-Perez, Lester Ho, Holger Claussen, Haris Gacanin, Cell ID Management in Multi-vendor and Multi-RAT Heterogeneous Networks, IEEE Transactions on Network and Service Management, 2019, p1--1 Journal Article, 2019 DOI

Federico Chiariotti, Stepan Kucera, Andrea Zanella, Holger Claussen, Analysis and Design of a Latency Control Protocol for Multi-Path Data Delivery With Pre-Defined QoS Guarantees, IEEE/ACM Transactions on Networking, 27, (3), 2019, p1165--1178 Journal Article, 2019 DOI

Mobility and Frailty in, editor(s)Gu D, Dupre M , Encyclopedia of Gerontology and Population Aging, Springer, Cham, 2019, [Hartley P, Romero-Ortuno R] Book Chapter, 2019 DOI

David Lynch, Michael Fenton, David Fagan, Stepan Kucera, Holger Claussen, Michael O'Neill, Automated Self-Optimization in Heterogeneous Wireless Communications Networks, IEEE/ACM Transactions on Networking, 2019, p1--14 Journal Article, 2019 DOI

Michael Fenton, David Lynch, David Fagan, Stepan Kucera, Holger Claussen, Michael O'Neill, Towards Automation and Augmentation of the Design of Schedulers for Cellular Communications Networks, Evolutionary Computation, 2018, p1--31 Journal Article, 2018 DOI

Ming Ding, David Lopez-Perez, Holger Claussen, Mohamed Ali Kaafar, On the Fundamental Characteristics of Ultra-Dense Small Cell Networks, IEEE Network, 32, (3), 2018, p92--100 Journal Article, 2018 DOI

Simone Ferlin, Stepan Kucera, Holger Claussen, Ozgu Alay, MPTCP Meets FEC: Supporting Latency-Sensitive Applications Over Heterogeneous Networks, IEEE/ACM Transactions on Networking, 26, (5), 2018, p2005--2018 Journal Article, 2018 DOI

Thuy M. Pham, Ronan Farrell, Holger Claussen, Mark F. Flanagan, Le-Nam Tran, Weighted Sum Rate Maximization for Zero-Forcing Methods with General Linear Covariance Constraints, 2018 IEEE International Conference on Communications (ICC), 2018 Conference Paper, 2018 DOI

Giovanni Geraci, Adrian Garcia-Rodriguez, David Lopez-Perez, Lorenzo Galati Giordano, Paolo Baracca, Holger Claussen, Indoor massive MIMO deployments for uniformly high wireless capacity, 2018 IEEE Wireless Communications and Networking Conference (WCNC), 2018 Conference Paper, 2018 DOI

Federico Chiariotti, Stepan Kucera, Andrea Zanella, Holger Claussen, LEAP: A latency control protocol for multi-path data delivery with pre-defined QoS guarantees, IEEE INFOCOM 2018 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS), 2018 Conference Paper, 2018 DOI

Rong Zhang, Ying Cui, Holger Claussen, Harald Haas, Lajos Hanzo, Anticipatory Association for Indoor Visible Light Communications: Light, Follow Me!, IEEE Transactions on Wireless Communications, 17, (4), 2018, p2499--2510 Journal Article, 2018 DOI

Michael Fenton, David Lynch, David Fagan, Stepan Kucera, Holger Claussen, Michael O'Neill, Towards automation & augmentation of the design of schedulers for cellular communications networks, Proceedings of the Genetic and Evolutionary Computation Conference Companion on - GECCO '18, 2018 Conference Paper, 2018 DOI

David Lynch, David Fagan, Stepan Kucera, Holger Claussen, Michael Oneill, Managing Quality of Service Through Intelligent Scheduling in Heterogeneous Wireless Communications Networks, 2018 IEEE Congress on Evolutionary Computation (CEC), 2018 Conference Paper, 2018 DOI

Thuy M. Pham, Ronan Farrell, Holger Claussen, Mark Flanagan, Le-Nam Tran, On the MIMO Capacity with Multiple Linear Transmit Covariance Constraints, 2018 IEEE 87th Vehicular Technology Conference (VTC Spring), 2018 Conference Paper, 2018 DOI

Simon Yiu, Marzieh Dashti, Holger Claussen, Fernando Perez-Cruz, Wireless RSSI fingerprinting localization, Signal Processing, 131, 2017, p235--244 Journal Article, 2017 DOI

Anna Zakrzewska, Lester Ho, Haris Gacanin, Holger Claussen, Coordination of SON Functions in Multi-Vendor Femtocell Networks, IEEE Communications Magazine, 55, (7), 2017, p165--171 Journal Article, 2017 DOI

Fenton, M., Lynch, D., Kucera, S., Claussen, H., O'Neill, M., Multilayer Optimization of Heterogeneous Networks Using Grammatical Genetic Programming, IEEE Transactions on Cybernetics, 47, (9), 2017, p2938-2950 Journal Article, 2017 DOI

Giovanni Geraci, Adrian Garcia-Rodriguez, David Lopez-Perez, Andrea Bonfante, Lorenzo Galati Giordano, Holger Claussen, Enhancing coexistence in the unlicensed band with massive MIMO, 2017 IEEE International Conference on Communications (ICC), 2017 Conference Paper, 2017 DOI

David Fagan, Michael Fenton, David Lynch, Stepan Kucera, Holger Claussen, Michael O'Neill, Deep learning through evolution: A hybrid approach to scheduling in a dynamic environment, 2017 International Joint Conference on Neural Networks (IJCNN), 2017 Conference Paper, 2017 DOI

Giovanni Geraci, Adrian Garcia-Rodriguez, David Lopez-Perez, Andrea Bonfante, Lorenzo Galati Giordano, Holger Claussen, Operating Massive MIMO in Unlicensed Bands for Enhanced Coexistence and Spatial Reuse, IEEE Journal on Selected Areas in Communications, 35, (6), 2017, p1282--1293 Journal Article, 2017 DOI

Holger Claussen, David López-Pérez, Lester Ho, Rouzbeh Razavi, Stepan Kucera, Small Cell Networks: Deployment, Management, and Optimization, 2017 Book, 2017 DOI

Adrian Garcia-Rodriguez, Giovanni Geraci, David Lopez-Perez, Lorenzo Galati Giordano, Ming Ding, Holger Claussen, Massive MIMO Unlicensed for High-Performance Indoor Networks, 2017 IEEE Globecom Workshops (GC Wkshps), 2017 Conference Paper, 2017 DOI

Michael Fenton, David Lynch, Stepan Kucera, Holger Claussen, Michael O'Neill, Multilayer optimization of heterogeneous networks using grammatical genetic programming, Proceedings of the Genetic and Evolutionary Computation Conference Companion on - GECCO '17, 2017 Conference Paper, 2017 DOI

Giovanni Geraci, Dong Fang, Holger Claussen, A New Method of MIMO-Based Non-Orthogonal Multiuser Downlink Transmission, 2017 IEEE 85th Vehicular Technology Conference (VTC Spring), 2017 Conference Paper, 2017 DOI

Marzieh Dashti, Holger Claussen, A metric to describe access point significance in location estimation, 2016 13th Workshop on Positioning, Navigation and Communications (WPNC), 2016 Conference Paper, 2016 DOI

Lester Ho, Holger Claussen, Haris Gacanin, Self-optimization of coverage and sleep modes of multi-vendor enterprise femtocells, 2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2016 Conference Paper, 2016 DOI

John Fakidis, Stefan Videv, Stepan Kucera, Holger Claussen, Harald Haas, Indoor Optical Wireless Power Transfer to Small Cells at Nighttime, Journal of Lightwave Technology, 34, (13), 2016, p3236--3258 Journal Article, 2016 DOI

Jianhua He, Wenqing Cheng, Zuoyin Tang, David Lopez-Perez, Holger Claussen, Analytical Evaluation of Higher Order Sectorization, Frequency Reuse, and User Classification Methods in OFDMA Networks, IEEE Transactions on Wireless Communications, 15, (12), 2016, p8209--8222 Journal Article, 2016 DOI

David Lynch, Michael Fenton, Stepan Kucera, Holger Claussen, Michael O'Neill, Evolutionary Learning of Scheduling Heuristics for Heterogeneous Wireless Communications Networks, Proceedings of the 2016 on Genetic and Evolutionary Computation Conference - GECCO '16, 2016 Conference Paper, 2016 DOI

Rong Zhang, Holger Claussen, Harald Haas, Lajos Hanzo, Energy Efficient Visible Light Communications Relying on Amorphous Cells, IEEE Journal on Selected Areas in Communications, 34, (4), 2016, p894--906 Journal Article, 2016 DOI

Cristina Cano, David Lopez-Perez, Holger Claussen, Douglas J. Leith, Using LTE in Unlicensed Bands: Potential Benefits and Coexistence Issues, IEEE Communications Magazine, 54, (12), 2016, p116--123 Journal Article, 2016 URL DOI

Anna Wielgoszewska, David Lopez-Perez, Holger Claussen, Haris Gacanin, A centralized method for PCI assignment with common reference signal frequency shift control, 2016 IEEE International Conference on Communications (ICC), 2016 Conference Paper, 2016 DOI

Simon Yiu, Marzieh Dashti, Holger Claussen, Fernando Perez-Cruz, Locating user equipments and access points using RSSI fingerprints: A Gaussian process approach, 2016 IEEE International Conference on Communications (ICC), 2016 Conference Paper, 2016 DOI

Marzieh Dashti, Holger Claussen, Extracting Location Information from RF Fingerprints, 2016 IEEE Globecom Workshops (GC Wkshps), 2016 Conference Paper, 2016 DOI

Dong Fang, Yu-Chih Huang, Zhiguo Ding, Giovanni Geraci, Shin-Lin Shieh, Holger Claussen, Lattice Partition Multiple Access: A New Method of Downlink Non-Orthogonal Multiuser Transmissions, 2016 IEEE Global Communications Conference (GLOBECOM), 2016 Conference Paper, 2016 DOI

H. Ahmadi, D. Finn, R. Razavi, H. Claussen, and L. A. DaSilva, Optimization of Demand Hotspot Capacities Using Switched Multi-Element Antenna Equipped Small Cells, IEEE 82nd Vehicular Technology Conference (VTC-Fall), Boston, MA, USA, 6-9 September, 2015, pp1 - 5 Conference Paper, 2015 URL DOI

Ming Ding, Meng Zhang, David Lopez-Perez, Holger Claussen, Correlated shadow fading for cellular network system-level simulations with wrap-around, 2015 IEEE International Conference on Communications (ICC), 2015 Conference Paper, 2015 DOI

Lester Ho, David Lopez-Perez, Holger Claussen, Downward Facing Directional Antennas for Ultra-High Density Indoor Small Cells, Journal of Signal Processing Systems, 83, (2), 2015, p255--263 Journal Article, 2015 DOI

D. Finn, H. Ahmadi, R. Razavi, H. Claussen, and L. A. DaSilva, Energy and Spectral Efficiency Gains from Multi-User MIMO-Based Small Cell Reassignments, 6-10 December 2015, IEEE Globecom, San Diego, CA, US, IEEE, 2015 Conference Paper, 2015 DOI

Marzieh Dashti, Mohd Amiruddin Abd Rahman, Hamed Mahmoudi, Holger Claussen, Detecting co-located mobile users, 2015 IEEE International Conference on Communications (ICC), 2015 Conference Paper, 2015 DOI

David Lopez-Perez, Ming Ding, Holger Claussen, Amir H. Jafari, Towards 1 Gbps/UE in Cellular Systems: Understanding Ultra-Dense Small Cell Deployments, IEEE Communications Surveys & Tutorials, 17, (4), 2015, p2078--2101 Journal Article, 2015 DOI

John Fakidis, Stepan Kucera, Holger Claussen, Harald Haas, On the design of a free space optical link for small cell backhaul communication and power supply, 2015 IEEE International Conference on Communication Workshop (ICCW), 2015 Conference Paper, 2015 DOI

David López-Pérez, Holger Claussen, Lester Ho, The sector offset configuration concept and its applicability to heterogeneous cellular networks, IEEE Communications Magazine, 53, (3), 2015, p190--198 Journal Article, 2015 DOI

Amir H. Jafari, David López-Pérez, Hui Song, Holger Claussen, Lester Ho, Jie Zhang, Small cell backhaul: challenges and prospective solutions, EURASIP Journal on Wireless Communications and Networking, 2015, (1), 2015 Journal Article, 2015 DOI

Michael Fenton, David Lynch, Stepan Kucera, Holger Claussen, Michael O'Neill, Load balancing in heterogeneous networks using an evolutionary algorithm, 2015 IEEE Congress on Evolutionary Computation (CEC), 2015 Conference Paper, 2015 DOI

Bahar Partov and Douglas J. Leith and Rouzbeh Razavi and Holger Clausen, Dynamic Idle Mode Control in Small Cell Networks, IEEE International Conference on Communications (ICC), 2015 Conference Paper, 2015 DOI URL

Stepan Kucera, Holger Claussen, Uplink-Oriented Deployment Guidelines and Auto-Configuration Algorithms for Co-Channel W-CDMA Heterogeneous Networks, IEEE Transactions on Wireless Communications, 14, (7), 2015, p3752--3763 Journal Article, 2015 DOI

Marzieh Dashti, Simon Yiu, Siamak Yousefi, Fernando Perez-Cruz, Holger Claussen, RSSI Localization with Gaussian Processes and Tracking, 2015 IEEE Globecom Workshops (GC Wkshps), 2015 Conference Paper, 2015 DOI

Stepan Kucera, Lester Ho, Rouzbeh Razavi, Holger Claussen, Coverage Optimization Trade-Offs in Heterogeneous W-CDMA Networks with Co-Channel Small Cells, 2014 IEEE 79th Vehicular Technology Conference (VTC Spring), 2014 Conference Paper, 2014 DOI

Toni Mastelic, Ariel Oleksiak, Holger Claussen, Ivona Brandic, Jean-Marc Pierson, Athanasios V. Vasilakos, Cloud Computing, ACM Computing Surveys, 47, (2), 2014, p1--36 Journal Article, 2014 DOI

Stepan Kucera, Holger Claussen, Impact of Co-Channel Small Cell Deployments on Uplink Capacity of W-CDMA Cellular Networks, 2014 IEEE 79th Vehicular Technology Conference (VTC Spring), 2014 Conference Paper, 2014 DOI

Rouzbeh Razavi, Holger Claussen, Digital Fountain Codes with Reduced Latency, Complexity and Buffer Requirements for Wireless Communications, 2014 IEEE 79th Vehicular Technology Conference (VTC Spring), 2014 Conference Paper, 2014 DOI

Rouzbeh Razavi, Lester Ho, Holger Claussen, David Lopez-Perez, Improving Small Cell Performance through Switched Multi-element Antenna Systems in Heterogeneous Networks, IEEE Transactions on Vehicular Technology, 2014, p1--1 Journal Article, 2014 DOI

Xiping Wu, Holger Claussen, Marco Di Renzo, Harald Haas, Channel Estimation for Spatial Modulation, IEEE Transactions on Communications, 62, (12), 2014, p4362--4372 Journal Article, 2014 DOI

David Lopez-Perez, Xiaoli Chu, Athanasios V. Vasilakos, Holger Claussen, Power Minimization Based Resource Allocation for Interference Mitigation in OFDMA Femtocell Networks, IEEE Journal on Selected Areas in Communications, 32, (2), 2014, p333--344 Journal Article, 2014 DOI

David Lopez-Porez, Holger Claussen, Improved frequency reuse through sector offset configuration in LTE Heterogeneous Networks, 2014 IEEE International Conference on Communications (ICC), 2014 Conference Paper, 2014 DOI

John Fakidis, Muhammad Ijaz, Stepan Kucera, Holger Claussen, Harald Haas, On the design of an optical wireless link for small cell backhaul communication and energy harvesting, 2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC), 2014 Conference Paper, 2014 DOI

Rouzbeh Razavi, David Lopez-Perez, Holger Claussen, A new approach for scrambling and spreading code reuse in WCDMA networks, 2013 IEEE Globecom Workshops (GC Wkshps), 2013 Conference Paper, 2013 DOI

Holger Claussen, Lester Ho, Multi-carrier cell structures with vertical and horizontal sector Offset using static beamforming, 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2013 Conference Paper, 2013 DOI

David Lopez-Perez, Holger Claussen, Lester Ho, Improved frequency reuse schemes with horizontal sector offset for LTE, 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2013 Conference Paper, 2013 DOI

David Lopez-Perez, Holger Claussen, Lester Ho, Sector offset configuration with static vertical beam-forming for LTE, 2013 IEEE Globecom Workshops (GC Wkshps), 2013 Conference Paper, 2013 DOI

Rouzbeh Razavi, Holger Claussen, Improved fuzzy reinforcement learning for self-optimisation of heterogeneous wireless networks, ICT 2013, 2013 Conference Paper, 2013 DOI

David Lopez-Perez, Xiaoli Chu, Athanasios V. Vasilakos, Holger Claussen, On Distributed and Coordinated Resource Allocation for Interference Mitigation in Self-Organizing LTE Networks, IEEE/ACM Transactions on Networking, 21, (4), 2013, p1145--1158 Journal Article, 2013 DOI

Holger Claussen, Lester Ho, Multi-carrier cell structures with offset sectorization for heterogeneous networks, 2013 IEEE International Conference on Communications Workshops (ICC), 2013 Conference Paper, 2013 DOI

Stepan Kucera, Holger Claussen, Uplink-oriented deployment guidelines and optimization in W-CDMA heterogeneous networks, 2013 IEEE Global Communications Conference (GLOBECOM), 2013 Conference Paper, 2013 DOI

David Lopez-Perez, Holger Claussen, Duty cycles and load balancing in HetNets with eICIC almost blank subframes, 2013 IEEE 24th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC Workshops), 2013 Conference Paper, 2013 DOI

Lester Ho, Holger Claussen, Davide Cherubini, Online evolution of femtocell coverage algorithms using genetic programming, 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2013 Conference Paper, 2013 DOI

R. Razavi, D. Lopez-Perez, H. Claussen, Neighbour cell list management in wireless heterogeneous networks, 2013 IEEE Wireless Communications and Networking Conference (WCNC), 2013 Conference Paper, 2013 DOI

Anna Zakrzewska, David Lopez-Perez, Stepan Kucera, Holger Claussen, Dual connectivity in LTE HetNets with split control- and user-plane, 2013 IEEE Globecom Workshops (GC Wkshps), 2013 Conference Paper, 2013 DOI

R. Razavi, H. Claussen, Urban small cell deployments: Impact on the network energy consumption, 2012 IEEE Wireless Communications and Networking Conference Workshops (WCNCW), 2012 Conference Paper, 2012 DOI

R. Razavi, H. Claussen, Controlling local service access in wireless cellular networks, 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC), 2012 Conference Paper, 2012 DOI

Alessandro Checco and Rouzbeh Razavi and Douglas J. Leith and Holger Claussen, Self-configuration of scrambling codes for WCDMA small cell networks, 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC), 2012, pp149 - 154, pp149-154 Conference Paper, 2012 URL DOI

Holger Claussen, Lester Ho, Multi-carrier cell structures with angular offset, 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC), 2012 Conference Paper, 2012 DOI

Erik Hemberg, Lester Ho, Michael O"Neill, Holger Claussen, A comparison of grammatical genetic programming grammars for controlling femtocell network coverage, Genetic Programming and Evolvable Machines, 14, (1), 2012, p65--93 Journal Article, 2012 DOI

Jeffrey G. Andrews, Holger Claussen, Mischa Dohler, Sundeep Rangan, Mark C. Reed, Femtocells: Past, Present, and Future, IEEE Journal on Selected Areas in Communications, 30, (3), 2012, p497--508 Journal Article, 2012 DOI

R. Razavi, C. Androne, H. Claussen, Handover optimisation for co-channel WCDMA heterogeneous networks, 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC), 2012 Conference Paper, 2012 DOI

R. Razavi, S. Kucera, C. Androne, H. Claussen, Characterisation of Other-Cell Interference in Co-Channel WCDMA Small Cell Networks, 2012 IEEE 75th Vehicular Technology Conference (VTC Spring), 2012 Conference Paper, 2012 DOI

Erik Hemberg, Lester Ho, Michael O'Neill, Holger Claussen, Comparing the robustness of grammatical genetic programming solutions for femtocell algorithms, Proceedings of the fourteenth international conference on Genetic and evolutionary computation conference companion - GECCO Companion '12, 2012 Conference Paper, 2012 DOI

Erik Hemberg, Lester Ho, Michael O'Neill, Holger Claussen, A symbolic regression approach to manage femtocell coverage using grammatical genetic programming, Proceedings of the 13th annual conference companion on Genetic and evolutionary computation - GECCO '11, 2011 Conference Paper, 2011 DOI

David López-Pérez, Xiaoli Chu, Athanasios V. Vasilakos, Holger Claussen, Minimising cell transmit power, ACM SIGCOMM Computer Communication Review, 41, (4), 2011, p410 Journal Article, 2011 DOI

López-Pérez, D., Chu, X., Claussen, H., Uncoordinated femtocell deployments, Heterogeneous Cellular Networks: Theory, Simulation and Deployment, 9781107023093, 2011, p217-244 Book, 2011

R. Razavi, H. Claussen, Self-configuring Switched Multi-Element Antenna system for interference mitigation in femtocell networks, 2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications, 2011 Conference Paper, 2011 DOI

David López-Pérez, Xiaoli Chu, Athanasios V. Vasilakos, Holger Claussen, Minimising cell transmit power, Proceedings of the ACM SIGCOMM 2011 conference on SIGCOMM - SIGCOMM '11, 2011 Conference Paper, 2011 DOI

Ismail Guvenc, Simon Saunders, Ozgur Oyman, Holger Claussen, Alan Gatherer, Femtocell Networks, EURASIP Journal on Wireless Communications and Networking, 2010, (1), 2010, p367878 Journal Article, 2010 DOI

Van Minh Nguyen, Holger Claussen, Efficient self-optimization of neighbour cell lists in macrocellular networks, 21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2010 Conference Paper, 2010 DOI

I. Ashraf, H. Claussen, L. T. W. Ho, Distributed Radio Coverage Optimization in Enterprise Femtocell Networks, 2010 IEEE International Conference on Communications, 2010 Conference Paper, 2010 DOI

R. Razavi, S. Klein, H. Claussen, Self-optimization of capacity and coverage in LTE networks using a fuzzy reinforcement learning approach, 21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2010 Conference Paper, 2010 DOI

Rouzbeh Razavi, Siegfried Klein, Holger Claussen, A fuzzy reinforcement learning approach for self-optimization of coverage in LTE networks, Bell Labs Technical Journal, 15, (3), 2010, p153--175 Journal Article, 2010 DOI

Doru Calin, Holger Claussen, Huseyin Uzunalioglu, On femto deployment architectures and macrocell offloading benefits in joint macro-femto deployments, IEEE Communications Magazine, 48, (1), 2010, p26--32 Journal Article, 2010 DOI

Holger Claussen, Imran Ashraf, Lester T. W. Ho, Dynamic idle mode procedures for femtocells, Bell Labs Technical Journal, 15, (2), 2010, p95--116 Journal Article, 2010 DOI

Imran Ashraf, Lester T. W. Ho, Holger Claussen, Improving Energy Efficiency of Femtocell Base Stations Via User Activity Detection, 2010 IEEE Wireless Communication and Networking Conference, 2010 Conference Paper, 2010 DOI

Holger Claussen, Autonomous self-deployment of wireless access networks, Bell Labs Technical Journal, 14, (1), 2009, p55--72 Journal Article, 2009 DOI

Holger Claussen, Doru Calin, Macrocell offloading benefits in joint macro-and femtocell deployments, 2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, 2009 Conference Paper, 2009 DOI

Holger Claussen, Lester T. W. Ho, Florian Pivit, Leveraging advances in mobile broadband technology to improve environmental sustainability, Telecommunications Journal of Australia, 59, (1), 2009, p4.1--4.18 Journal Article, 2009 DOI

H. Claussen, F. Pivit, Femtocell Coverage Optimization Using Switched Multi-Element Antennas, 2009 IEEE International Conference on Communications, 2009 Conference Paper, 2009 DOI

John D. Hobby, Holger Claussen, Deployment options for femtocells and their impact on existing macrocellular networks, Bell Labs Technical Journal, 13, (4), 2009, p145--160 Journal Article, 2009 DOI

Lester T. W. Ho, Imran Ashraf, Holger Claussen, Evolving femtocell coverage optimization algorithms using genetic programming, 2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, 2009 Conference Paper, 2009 DOI

Holger Claussen, Florian Pivit, Lester T. W. Ho, Self-Optimization of femtocell coverage to minimize the increase in core network mobility signalling, Bell Labs Technical Journal, 14, (2), 2009, p155--183 Journal Article, 2009 DOI

Joseph O'Carroll, Holger Claussen, Linda Doyle, Partial GSM spectrum reuse for femtocells, IEEE Personal, Indoor and Mobile Radio Communications, Sept 2009, edited by IEEE , 2009, pp2111 - 2116 Conference Paper, 2009 DOI

Holger Claussen, Lester T. W. Ho, Florian Pivit, Effects of joint macrocell and residential picocell deployment on the network energy efficiency, 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, 2008 Conference Paper, 2008 DOI

Holger Claussen, Lester T. W. Ho, Louis G. Samuel, Self-optimization of coverage for femtocell deployments, 2008 Wireless Telecomunications Symposium, 2008 Conference Paper, 2008 DOI

Holger Claussen, Co-Channel Operation of Macro- and Femtocells in a Hierarchical Cell Structure, International Journal of Wireless Information Networks, 15, (3-4), 2008, p137--147 Journal Article, 2008 DOI

Holger Claussen, Lester T. W. Ho, Louis G. Samuel, An overview of the femtocell concept, Bell Labs Technical Journal, 13, (1), 2008, p221--245 Journal Article, 2008 DOI

Lester T. W. Ho, Holger Claussen, Effects of User-Deployed, Co-Channel Femtocells on the Call Drop Probability in a Residential Scenario, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007 Conference Paper, 2007 DOI

H. Claussen, L. T. W. Ho, L. G. Samuel, Financial Analysis of a Pico-Cellular Home Network Deployment, 2007 IEEE International Conference on Communications, 2007 Conference Paper, 2007 DOI

Holger Claussen, Performance of Macro- and Co-Channel Femtocells in a Hierarchical Cell Structure, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007 Conference Paper, 2007 DOI

Holger Claussen, Distributed Algorithms for Robust Self-deployment and Load Balancing in Autonomous Wireless Access Networks, 2006 IEEE International Conference on Communications, 2006 Conference Paper, 2006 DOI

Hamid Karimi, Lester W. Ho, Holger Claussen, Louis Samuel, Evolution Towards Dynamic Spectrum Sharing in Mobile Communications, 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, 2006 Conference Paper, 2006 DOI

Mullany, F.J., Ho, L.T.W., Samuel, L.G., Claussen, H., Self-deployment, self-configuration: Critical future paradigms for wireless access networks, Lecture Notes in Computer Science, 3457, 2005, p58-68 Conference Paper, 2005

Holger Claussen, Hamid Reza Karimi, Bernard Mulgrew, Improved Max-Log-MAP Turbo Decoding by Maximization of Mutual Information Transfer, EURASIP Journal on Advances in Signal Processing, 2005, (6), 2005 Journal Article, 2005 DOI

L.T.W. Ho, F.J. Mullany, H. Claussen, L.G. Samuel, Autonomous organization of wireless network transport in a multi-provider environment, IEEE, 2005 Conference Paper, 2005 DOI

H. Claussen, H.R. Karimi, B. Mulgrew, Low complexity detection of high-order modulations in multiple antenna systems, IEE Proceedings - Communications, 152, (6), 2005, p789 Journal Article, 2005 DOI

Claussen, H., Efficient modelling of channel maps with correlated shadow fading in mobile radio systems, IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, 1, 2005, p512-516 Conference Paper, 2005

Claussen, H., Karimi, H.R., Mulgrew, B., Layered encoding for low complexity detection of high-order modulations in MIMO channels, IEEE International Symposium on Spread Spectrum Techniques and Applications, 2004, p7-11 Conference Paper, 2004

H. Claussen, H.R. Karimi, B. Mulgrew, High-performance MIMO receivers based on multi-stage partial parallel interference cancellation, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484), 2003 Conference Paper, 2003 DOI

Claussen, H., Karimi, H.R., Mulgrew, B., A low complexity iterative receiver based on successive cancellation for MIMO, IFIP Advances in Information and Communication Technology, 106, 2003, p105-112 Book, 2003 DOI

H. Claussen, Layered encoding for 16- and 64-QAM iterative MIMO receivers, 5th European Personal Mobile Communications Conference 2003, 2003 Conference Paper, 2003 DOI

Karimi, H.R., Claussen, H., Impact of Modeling Errors on the Performance of MIMO Receivers with APP and PIC Detection, Conference Record / IEEE Global Telecommunications Conference, 3, 2003, p1231-1236 Conference Paper, 2003

Claussen, H., Karimi, H.R., Mulgrew, B., High-performance MIMO receivers based on multi-stage partial parallel interference cancellation, IEEE Vehicular Technology Conference, 58, (1), 2003, p414-418 Conference Paper, 2003

Claussen, H., Mulgrew, B., Karimi, H.R., Performance optimization of successive cancellation detectors, Proceedings - 2002 International Conference on Third Generation Wireless and Beyond (Key Function of World Wireless Congress), 2002, p797-802 Conference Paper, 2002

H. Claussen, Efficient modelling of channel maps with correlated shadow fading in mobile radio systems, 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications Conference Paper, DOI

H.R. Karimi, H. Claussen, Impact of modeling errors on the performance of MIMO receivers with APP and PIC detection, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Conference Paper, DOI

H. Claussen, L.T.W. Ho, H.R. Karimi, F.J. Mullany, L.G. Samuel, I, base station: Cognisant robots and future wireless access networks, CCNC 2006. 2006 3rd IEEE Consumer Communications and Networking Conference, 2006. Conference Paper, DOI

H. Claussen, H.R. Karimi, B. Mulgrew, Improved max-log map turbo decoding using maximum mutual information combining, 14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. Conference Paper, DOI

H. Claussen, H.R. Karimi, B. Mulgrew, Layered encoding for low complexity detection of high-order modulations in MIMO channels, Eighth IEEE International Symposium on Spread Spectrum Techniques and Applications - Programme and Book of Abstracts (IEEE Cat. No.04TH8738) Conference Paper, DOI

Recognition

Awards and Honours

Member of Royal Irish Academy 2025

IEEE Fellow for contributions to small cell wireless network technology 2022

Professorial Fellow, Trinity College Dublin 2025

World Technology Award in the individual category Communications Technologies 2014

Bell Labs Inventors Award 2009 for being the top inventor in Bell Labs globally, Oct 2009 2009

Humies Gold Award for the paper "Automated Self-Optimization in Heterogeneous Wireless Communication Networks" in IEEE/ACM Transactions on Networking, vol. 27, no. 1, pp. 419-432, Feb. 2019 2019

Eckermann-TJA Prize for the paper "Leveraging advances in mobile broadband technology to improve environmental sustainability," Telecommunications Journal of Australia Volume 59, No. 1, Feb. 2009. 2009

Excellent Paper Award for the paper "Improved Max-Log-MAP turbo decoding using maximum mutual information combining" at the 14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications PIMRC 2003, Beijing, China. 2005

Best Paper Award for the paper "Layered encoding for 16- and 64-QAM iterative MIMO receivers" at the 5th European Personal Mobile Communications Conference EPMCC 2003, Glasgow, UK. 2003

Innovator of the Year, 2023 - University College Cork. 2003

Top Inventor in Nokia Dublin for granted patents of all time 2019

Top Manager in R&D driving IPR in Nokia Dublin 2019

CEO Excellence "Game Changer" Award for contributions to lightRadio, Alcatel-Lucent 2011

Corporate Social Responsibility Champions Award, Alcatel-Lucent 2008