Photonic network Design Based on Reference Circuits. - E.-J. Bachus; Michael H. Eiselt; Kai Habel; Klaus-Dieter Langer; E.-U. Scheuing; F.-C. Tischer (ONDM, 1997)

Implementation of a 84 Mbit/s visible-light link based on discrete-multitone modulation and LED room lighting. - Klaus-Dieter Langer; Luz Fernandez del Rosal; Christoph Kottke; Joachim W. Walewski; Stefan Nerreter; Kai Habel; Jelena Vucic (CSNDSP, 2010)

Coherent Subcarrier-WDM-PON system with SSB modulation and wavelength reuse. - Christoph Kottke; Kai Habel; Michael Eiselt; Helmut Griesser; Jörg-Peter Elbers (OFC/NFOEC, 2013)

Eye-safe high-capacity 1-mm GI-POF interconnects exploiting discrete multitone modulation. - Roman Kruglov; Sven Loquai; Florian Winkler; Christian-Alexander Bunge; Bernhard Schmauss; Olaf Ziemann; Kai Habel (OFC/NFOEC, 2013)

33% Capacity improvement of a direct-modulation direct-detection OFDM link using adaptive Volterra equalization. - Nuno Sequeira Andre; Hadrien Louchet; Kai Habel; André Richter (ECOC, 2014)

Software-defined wired-wireless access network convergence: The SODALES approach. - Jordi Ferrer Riera; Carlos Bock; Eduard Escalona; Volker Jungnickel; Kai Habel; Michael C. Parker; Stuart D. Walker; Terry Quinlan; Victor Marques 001; David Levi (GLOBECOM Workshops, 2014)

Techno-economics and performance of convergent radio and fibre architectures. - Carlos Bock; Jordi Ferrer Riera; Michael C. Parker; Stuart D. Walker; Tiago Mendes; Victor Marques 001; Volker Jungnickel; Kai Habel; David Levi (ICTON, 2014)

Software-defined open architecture for front- and backhaul in 5G mobile networks. - Volker Jungnickel; Kai Habel; Michael C. Parker; Stuart D. Walker; Carlos Bock; Jordi Ferrer Riera; Victor Marques 001; David Levi (ICTON, 2014)

5 Gbit/s real-time processing using π/4-shift DQPSK for bidirectional radio-over-fibre system. - Kai Habel; Luz Fernandez del Rosal; Stefan Weide; Jonas Hilt; Volker Jungnickel; Robert Elschner; Colja Schubert; Felix Frey; Johannes Karl Fischer; Ronald Freund (ICTON, 2015)

Optical wireless LED link for the backhaul of small cells. - Dominic Schulz; Michael Schlosser 001; Christos Alexakis; Kai Habel; Jonas Hilt; Ronald Freund; Volker Jungnickel (OFC, 2015)

CHARISMA: Converged heterogeneous advanced 5G cloud-RAN architecture for intelligent and secure media access. - Michael C. Parker; Geza Koczian; Femi Adeyemi-Ejeye; Terry Quinlan; Stuart D. Walker; A. Legarrea; Muhammad Shuaib Siddiqui; Eduard Escalona; S. Spirou; Dimitrios Kritharidis; Kai Habel; Volker Jungnickel; et al. (EuCNC, 2016)

Software-defined Open Access for flexible and service-oriented 5G deployment. - Volker Jungnickel; Michael C. Parker; Jordi Ferrer Riera; Carlos Bock; Victor Marques 001; David Levi; Dominic Schulz; Jonas Hilt; Kai Habel; Luz Fernandez del Rosal; Ronald Freund; Stuart D. Walker (ICC Workshops, 2016)

154.9 Gb/s OFDM transmission using IM-DD, electrical IQ-mixing and signal combining. - Christoph Kottke; Kai Habel; Christian Schmidt 001; Volker Jungnickel (OFC, 2016)

First demonstration of cognitive SDN orchestration: A real-time congestion-aware services provisioning over OFDM-based 400G OPS and Flexi-WDM OCS networks. - Yuki Yoshida; Ken-ichi Kitayama; Y. Kai; Masato Nishihara; Ryo Okabe; Toshiki Tanaka; Tomoo Takahara; Jens C. Rasmussen; Noboru Yoshikane; Xiaoyuan Cao; Takehiro Tsuritani; Itsuro Morita; et al. (OFC, 2016)

Hierarchical, virtualised and distributed intelligence 5G architecture for low-latency and secure applications. - Muhammad Shuaib Siddiqui; A. Legarrea; Eduard Escalona; Michael C. Parker; Geza Koczian; Stuart D. Walker; George L. Lyberopoulos; Helen Theodoropoulou; Konstantinos Filis; A. Foglar; Marian Ulbricht; Y. Liu; et al. (Trans. Emerg. Telecommun. Technol., 2016)

Ultra-low latency 5G CHARISMA architecture for secure intelligent transportation verticals. - Michael C. Parker; Geza Koczian; Stuart D. Walker; Kai Habel; Volker Jungnickel; Theodoros Rokkas; Ioannis Neokosmidis; Muhammad Shuaib Siddiqui; Eduard Escalona; Carolina Canales-Valenzuela; A. Foglar; Marian Ulbricht; et al. (ICTON, 2017)

100G OFDM-PON for converged 5G networks: From concept to real-time prototype. - Kai Habel; Matthias Koepp; Stefan Weide; Luz Fernandez del Rosal; Christoph Kottke; Volker Jungnickel (OFC, 2017)

Next-Generation Optical Fronthaul in the iCirrus Project. - Jörg-Peter Elbers; Jim Zou; Philippos Assimakopoulos; Nathan J. Gomes; Kai Habel; Volker Jungnickel; Gregor Linne; Christoph Juchems; Philippe Chanclou; Patrik Ritosa; Howard Thomas (OFC, 2018)

CHARISMA - 5G Low Latency Technologies and their Interaction with Automotion¹ Control Loops. - Marian Ulbricht; Philipp Dockhorn; Umar Farooq Zia; Christian Liss; Eugene Zetserov; Kai Habel; Mike Parker (J. Commun., 2018)

A Converged Evolved Ethernet Fronthaul for the 5G Era. - Philippos Assimakopoulos; Jim Zou; Kai Habel; Jörg-Peter Elbers; Volker Jungnickel; Nathan J. Gomes (IEEE J. Sel. Areas Commun., 2018)

Testbed Verification of New Fronthaul Technology for 5G Systems. - Nathan J. Gomes; Philippos Assimakopoulos; Philippe Chanclou; Kai Habel; Volker Jungnickel; Patrik Ritosa; Jim Zou; Jörg-Peter Elbers; Howard Thomas; Gregor Linne; Christoph Juchems (ICC Workshops, 2019)

Photonics-Supported 5G Test Facilities for Low Latency Applications. - Behnam Shariati; Kai Habel; Volker Jungnickel; Johannes K. Fischer; Ronald Freund (ICTON, 2019)

PON transceiver technologies for ≥50 Gbits/s per λ: Alamouti coding and heterodyne detection [Invited]. - M. Sezer Erkilinç; Robert Emmerich; Kai Habel; Volker Jungnickel; Carsten Schmidt-Langhorst; Colja Schubert; Ronald Freund (JOCN, 2020)

Hy-Fi: Aggregation of LiFi and WiFi using MIMO in IEEE 802.11. - Anatolij Zubow; Piotr Gawlowicz; Kai Lennert Bober; Volker Jungnickel; Kai Habel; Falko Dressler (WOWMOM, 2021)

An Automotive Communication Bus Using OFDMA. - Matthias Koepp; Kai Habel; Volker Jungnickel (ICTON, 2023)

Hybrid-Fidelity: Utilizing IEEE 802.11 MIMO for Practical Aggregation of LiFi and WiFi. - Anatolij Zubow; Piotr Gawlowicz; Carolin Brunn; Kai Lennert Bober; Volker Jungnickel; Kai Habel; Falko Dressler (IEEE Trans. Mob. Comput., 2023)

Record length of 2000 km weakly-coupled 7-core MCF produced from a single large-scale MCF preform. - Tobias Tiess; Michael Lorenz; Jong-Won Lee; Maximilian Schmitt; Jimmy E. Beavers; Evan P. Green; Nicolaj L. Andersen; Andreas C. Samson; Frederik N. Andersen; Sarah Cwalina; Kai Habel; Qiulin Ma; et al. (OFC, 2024)

Real-Time Experiments Towards an Automotive OFDMA Communication Bus. - Matthias Koepp; Kai Habel; Volker Jungnickel (VTC Spring, 2024)