Sub-THz Communications: Perspective and Results From the Hexa-X-II Project.

Ilkka Harjula

Italo Atzeni Gustavo Rodrigues de Lima Tejerina Rafael Berkvens Hui Chen 0014 Jean-Marc Conrat Mar Francis D. De Guzman Claude Desset Meik Dörpinghaus Hamed Farhadi Gerhard P. Fettweis Florian Gast Hardy Halbauer Rreze Halili Katsuyuki Haneda Ilkka Harjula Bruno Jahan Ramin Khayatzadeh Pekka Kyösti Rodolphe Legouable Arto Lehti Dileepa Marasinghe Le-Hang Nguyen Sharief Saleh Kaan Senparlak Nuutti Tervo Oskari Tervo Henk Wymeersch Bo Xu 0006 Peize Zhang Sub-THz Communications: Perspective and Results From the Hexa-X-II Project. 7495-7540 2025 6 IEEE Open J. Commun. Soc. https://doi.org/10.1109/OJCOMS.2025.3591836 db/journals/ojcs/ojcs6.html#AtzeniTBCCGDDFFGHHHHJKK25 streams/journals/ojcs

Kari Hooli Pasi Kinnunen Esa Tiirola Sami Hakola Zsombor Kiss Jorma Kaikkonen Matthew Baker Ilkka Harjula Extending 5G to Narrow Spectrum Allocations. 1936-1944 2023 June 41 IEEE J. Sel. Areas Commun. 6 https://doi.org/10.1109/JSAC.2023.3273703 db/journals/jsac/jsac41.html#HooliKTHKKBH23

Ijaz Ahmad 0001 Jarno Pinola Ilkka Harjula Jani Suomalainen Erkki Harjula Jyrki Huusko Tanesh Kumar An Overview of the Security Landscape of Virtual Mobile Networks. 169014-169030 2021 9 IEEE Access https://doi.org/10.1109/ACCESS.2021.3133319 db/journals/access/access9.html#AhmadPHSHHK21

Mika Hoppari Mikko Uitto Jukka Mäkelä Ilkka Harjula Seppo J. Rantala Performance of the 5th Generation Indoor Wireless Technologies-Empirical Study. 180 2021 13 Future Internet 7 https://doi.org/10.3390/fi13070180 db/journals/fi/fi13.html#HoppariUMHR21

Ilkka Harjula Mikko Uitto Marko Jurmu Jukka Koskinen Jukka Mäkelä Stefan Walter Markku Hentula Tapio Heikkilä Marja Lintala Kyösti Rautiola Smart Manufacturing Multi-Site Testbed with 5G and Beyond Connectivity. 1-6 2021 PIMRC https://doi.org/10.1109/PIMRC50174.2021.9569284 conf/pimrc/2021 db/conf/pimrc/pimrc2021.html#HarjulaUJKMWHHL21 Mika Hoppari Ilkka Harjula Jarno Pinola The LSA Based Spectrum Sharing Solution for Wireless Research Networks Utilizing Commercial MNO Networks. 28-33 2020 EuCNC https://doi.org/10.1109/EuCNC48522.2020.9200917 conf/eucnc/2020 db/conf/eucnc/eucnc2020.html#HoppariHP20 Ilkka Harjula Laura Panizo Barbara Valera-Muros Jarno Pinola Mika Hoppari Adam Flizikowski Maria B. Safianowska Dynamic Spectrum Management for European-Wide Research Network. 1-6 2020 VTC Spring https://doi.org/10.1109/VTC2020-Spring48590.2020.9129017 conf/vtc/2020s db/conf/vtc/vtc2020s.html#HarjulaPVPHFS20

Ijaz Ahmad 0001 Ilkka Harjula Jarno Pinola Overview of Security of Virtual Mobile Networks. 2020 abs/2007.08871 CoRR https://arxiv.org/abs/2007.08871 db/journals/corr/corr2007.html#abs-2007-08871

Jarno Pinola Ilkka Harjula Adam Flizikowski Maria B. Safianowska Arslan Ahmad Suvidha Sudhakar Mhatre EuWireless RAN Architecture and Slicing Framework for Virtual Testbeds. 131-149 2019 TRIDENTCOM https://doi.org/10.1007/978-3-030-43215-7_10 conf/tridentcom/2019 db/conf/tridentcom/tridentcom2019.html#PinolaHFSAM19 Sandrine Boumard Ilkka Harjula Teemu Kanstrén Seppo J. Rantala Comparison of Spectral and Energy Efficiency Metrics Using Measurements in a LTE-A Network. 1-8 2018 TMA https://doi.org/10.23919/TMA.2018.8506529 conf/tma/2018 db/conf/tma/tma2018.html#BoumardHKR18

Ting Zhou Tianyu Sun Honglin Hu Hui Xu 0007 Yang Yang 0001 Ilkka Harjula Yevgeni Koucheryavy Analysis and prediction of 100 km-scale atmospheric duct interference in TD-LTE networks. 66-80 2017 2 J. Commun. Inf. Networks 1 https://doi.org/10.1007/s41650-017-0006-x db/journals/jcin/jcin2.html#ZhouSHX0HK17

Yu Zeng 0003 Honglin Hu Ilkka Harjula Boqi Jia Tianheng Xu Yang Yang 0001 Performance Analysis on Spectral-Energy Efficiency Tradeoff in the D2D-Relay Mechanism. 1-6 2017 GLOBECOM https://doi.org/10.1109/GLOCOM.2017.8254219 conf/globecom/2017 db/conf/globecom/globecom2017.html#ZengHHJX017 Sandrine Boumard Ilkka Harjula Kari Horneman Honglin Hu Throughput and energy consumption trade-off in traffic splitting in heterogeneous networks with dual connectivity. 1-5 2017 PIMRC https://doi.org/10.1109/PIMRC.2017.8292706 conf/pimrc/2017 db/conf/pimrc/pimrc2017.html#BoumardHHH17 Matti Latva-aho Ari Pouttu Atso Hekkala Ilkka Harjula Jukka Mäkelä Small cell based 5G test network (5GTN). 231-235 2015 ISWCS https://doi.org/10.1109/ISWCS.2015.7454335 conf/iswcs/2015 db/conf/iswcs/iswcs2015.html#Latva-ahoPHHM15 Eeva Lähetkangas Kari Pajukoski Gilberto Berardinelli Fernando M. L. Tavares Esa Tiirola Ilkka Harjula Preben E. Mogensen Bernhard Raaf On the Selection of Guard Period and Cyclic Prefix for Beyond 4G TDD Radio Access Network. 2013 EW http://www.vde-verlag.de/proceedings-de/563498011.html conf/ew/2013 db/conf/ew/ew2013.html#LahetkangasPBTTHMR13 Eeva Lähetkangas Kari Pajukoski Esa Tiirola Gilberto Berardinelli Ilkka Harjula Jaakko Vihriälä On the TDD subframe structure for beyond 4G radio access network. 1-10 2013 Future Network & Mobile Summit https://ieeexplore.ieee.org/document/6633569/ conf/fnms/2013 db/conf/fnms/fnms2013.html#LahetkangasPTBHV13 Esa Tiirola Bernhard Raaf Eeva Lähetkangas Ilkka Harjula Kari Pajukoski On the design of discovery patterns for half-duplex TDD nodes operating in frame-based systems. 1-9 2013 Future Network & Mobile Summit https://ieeexplore.ieee.org/document/6633585/ conf/fnms/2013 db/conf/fnms/fnms2013.html#TiirolaRLHP13 Ilkka Harjula Risto Wichman Kari Pajukoski Eeva Lähetkangas Esa Tiirola Olav Tirkkonen Full duplex relaying for local area. 2684-2688 2013 PIMRC https://doi.org/10.1109/PIMRC.2013.6666602 conf/pimrc/2013 db/conf/pimrc/pimrc2013.html#HarjulaWPLTT13 Olav Tirkkonen Eeva Lähetkangas Kari Pajukoski Esa Tiirola Ilkka Harjula Multihop Relaying for Local Area Access. 1-5 2013 VTC Spring https://doi.org/10.1109/VTCSpring.2013.6692642 conf/vtc/2013s db/conf/vtc/vtc2013s.html#TirkkonenLPTH13 Ilkka Harjula Jarno Pinola Jarmo Prokkola Performance of IEEE 802.11 based WLAN devices under various jamming signals. 2129-2135 2011 MILCOM https://doi.org/10.1109/MILCOM.2011.6127635 conf/milcom/2011 db/conf/milcom/milcom2011.html#HarjulaPP11 Ilkka Harjula Atso Hekkala Spectrum sensing in cognitive femto base stations using welch periodogram. 2305-2309 2011 PIMRC https://doi.org/10.1109/PIMRC.2011.6139930 conf/pimrc/2011 db/conf/pimrc/pimrc2011.html#HarjulaH11 Ilkka Harjula Atso Hekkala Marja Matinmikko Miia Mustonen Performance Evaluation of Spectrum Sensing Using Welch Periodogram for OFDM Signals. 1-5 2011 VTC Spring https://doi.org/10.1109/VETECS.2011.5956246 conf/vtc/2011s db/conf/vtc/vtc2011s.html#HarjulaHMM11

Atso Hekkala Mika Lasanen Ilkka Harjula Luis C. Vieira Nathan J. Gomes Anthony Nkansah Steffen Bittner Fabian Diehm Vincent Kotzsch Analysis of and compensation for non-ideal RoF links in DAS. 52-59 2010 17 IEEE Wirel. Commun. 3 https://doi.org/10.1109/MWC.2010.5490979 db/journals/wc/wc17.html#HekkalaLHVGNBDK10

Mikko Hiivala Ilkka Harjula Mika Lasanen Low-complexity channel estimation for superimposed pilots in distributed OFDMA systems. 1-6 2010 WTS https://doi.org/10.1109/WTS.2010.5479650 conf/wts/2010 db/conf/wts/wts2010.html#HiivalaHL10

Marja Matinmikko Tapio Rauma Miia Mustonen Ilkka Harjula Heli Sarvanko Aarne Mämmelä Application of Fuzzy Logic to Cognitive Radio Systems. 3572-3580 2009 92-B IEICE Trans. Commun. 12 https://doi.org/10.1587/transcom.E92.B.3572 http://search.ieice.org/bin/summary.php?id=e92-b_12_3572 db/journals/ieicet/ieicet92b.html#MatinmikkoRMHSM09

Pedro Neves 0001 Tuomas Nissilä Telmo Pereira 0001 Ilkka Harjula João L. Monteiro Kostas Pentikousis Susana Sargento Francisco Fontes A vendor-independent resource control framework for WiMAX. 899-906 2008 ISCC https://doi.org/10.1109/ISCC.2008.4625750 https://doi.ieeecomputersociety.org/10.1109/ISCC.2008.4625750 https://www.wikidata.org/entity/Q62820828 conf/iscc/2008 db/conf/iscc/iscc2008.html#NevesNPHMPSF08 Tuomas Nissilä Kostas Pentikousis Ilkka Harjula Jyrki Huusko Mika Rautio WiMAX backhaul for environmental monitoring. 185-188 2008 MUM https://doi.org/10.1145/1543137.1543175 conf/mum/2008 db/conf/mum/mum2008.html#NissilaPHHR08 Kostas Pentikousis Esa Piri Jarno Pinola Frerk Fitzek Tuomas Nissilä Ilkka Harjula Empirical evaluation of VoIP aggregation over a fixed WiMAX testbed. 19 2008 TRIDENTCOM https://doi.org/10.4108/tridentcom.2008.3140 https://dl.acm.org/citation.cfm?id=1390599 conf/tridentcom/2008 db/conf/tridentcom/tridentcom2008.html#PentikousisPPFNH08 Paola Cardamone Ilkka Harjula Federico Albiero Marcos D. Katz Lorenzo Mucchi WiMAX Channel Model for Mountainous Areas. 1-5 2008 VTC Fall https://doi.org/10.1109/VETECF.2008.53 conf/vtc/2008f db/conf/vtc/vtc2008f.html#CardamoneHAKM08

Kostas Pentikousis Ilkka Harjula Esa Piri Jarno Pinola Quantifying WiMAX Performance. 2008 2008 ERCIM News 74 http://ercim-news.ercim.eu/quantifying-wimax-performance db/journals/ercim/ercim2008.html#PentikousisHPP08

Ilkka Harjula Aarne Mämmelä Channel estimation algorithm for space-time block coded OFDM systems. 143-147 2003 GLOBECOM https://doi.org/10.1109/GLOCOM.2003.1258219 conf/globecom/2003 db/conf/globecom/globecom2003.html#HarjulaM03 Arslan Ahmad Ijaz Ahmad 0001 Federico Albiero Italo Atzeni Matthew Baker Gilberto Berardinelli Rafael Berkvens Steffen Bittner Sandrine Boumard Paola Cardamone Hui Chen 0014 Jean-Marc Conrat Claude Desset Fabian Diehm Meik Dörpinghaus Hamed Farhadi Gerhard P. Fettweis Frerk Fitzek Adam Flizikowski Francisco Fontes Florian Gast Nathan J. Gomes Mar Francis D. De Guzman Sami Hakola Hardy Halbauer Rreze Halili Katsuyuki Haneda Erkki Harjula Tapio Heikkilä Atso Hekkala Markku Hentula Mikko Hiivala Kari Hooli Mika Hoppari Kari Horneman Honglin Hu Jyrki Huusko Bruno Jahan Boqi Jia Marko Jurmu Jorma Kaikkonen Teemu Kanstrén Marcos D. Katz Ramin Khayatzadeh Pasi Kinnunen Zsombor Kiss Jukka Koskinen Vincent Kotzsch Yevgeni Koucheryavy Tanesh Kumar Pekka Kyösti Eeva Lähetkangas Mika Lasanen Matti Latva-aho Rodolphe Legouable Arto Lehti Marja Lintala Jukka Mäkelä Aarne Mämmelä Dileepa Marasinghe Marja Matinmikko Suvidha Sudhakar Mhatre Preben Mogensen 0001Preben E. Mogensen João L. Monteiro Lorenzo Mucchi Miia Mustonen Pedro Neves 0001 Le-Hang Nguyen Tuomas Nissilä Anthony Nkansah Kari Pajukoski Laura Panizo Kostas Pentikousis Telmo Pereira 0001 Jarno Pinola Esa Piri Ari Pouttu Jarmo Prokkola Bernhard Raaf Seppo J. Rantala Tapio Rauma Mika Rautio Kyösti Rautiola Maria B. Safianowska Sharief Saleh Susana Sargento Heli Sarvanko Kaan Senparlak Tianyu Sun Jani Suomalainen Fernando M. L. Tavares Gustavo Rodrigues de Lima Tejerina Nuutti Tervo Oskari Tervo Esa Tiirola Olav Tirkkonen Mikko Uitto Barbara Valera-Muros Luis C. Vieira Jaakko Vihriälä Stefan Walter Risto Wichman Henk Wymeersch Bo Xu 0006 Hui Xu 0007 Tianheng Xu Yang Yang 0001 Yu Zeng 0003 Peize Zhang Ting Zhou