Sperga, Janis; Islim, Mohamed Sufyan; Bian, Rui; Martena, Giovanni Luca; Haas, Harald
Photodiode Arrays Do Not Violate the Second Law of Thermodynamics: Photocurrent Bandwidth Trade-Off Proceedings Article
In: ICC 2024 - IEEE International Conference on Communications, pp. 2414–2419, IEEE, Denver, CO, USA, 2024, ISBN: 978-1-72819-054-9.
@inproceedings{sperga_photodiode_2024,
title = {Photodiode Arrays Do Not Violate the Second Law of Thermodynamics: Photocurrent Bandwidth Trade-Off},
author = {Janis Sperga and Mohamed Sufyan Islim and Rui Bian and Giovanni Luca Martena and Harald Haas},
url = {https://ieeexplore.ieee.org/document/10622212/},
doi = {10.1109/ICC51166.2024.10622212},
isbn = {978-1-72819-054-9},
year = {2024},
date = {2024-06-01},
urldate = {2024-10-30},
booktitle = {ICC 2024 - IEEE International Conference on Communications},
pages = {2414–2419},
publisher = {IEEE},
address = {Denver, CO, USA},
keywords = {LRDC},
pubstate = {published},
tppubtype = {inproceedings}
}
Li, Juncheng; Huang, Yifan; Huang, Shenjie; Tavakkolnia, Iman; Haas, Harald; Safari, Majid
Integrated Communication and Positioning for IRS-Assisted LiFi Networks Proceedings Article
In: 2024 IEEE Wireless Communications and Networking Conference (WCNC), pp. 01–06, IEEE, Dubai, United Arab Emirates, 2024, ISBN: 9798350303582, (Place: Piscataway, NJ).
Abstract | Links | BibTeX | Tags: LiFi, LRDC, machine learning, optical wireless communication (OWC)
@inproceedings{li_integrated_2024,
title = {Integrated Communication and Positioning for IRS-Assisted LiFi Networks},
author = {Juncheng Li and Yifan Huang and Shenjie Huang and Iman Tavakkolnia and Harald Haas and Majid Safari},
url = {https://ieeexplore.ieee.org/document/10570819/},
doi = {10.1109/WCNC57260.2024.10570819},
isbn = {9798350303582},
year = {2024},
date = {2024-04-01},
urldate = {2026-06-03},
booktitle = {2024 IEEE Wireless Communications and Networking Conference (WCNC)},
pages = {01–06},
publisher = {IEEE},
address = {Dubai, United Arab Emirates},
series = {IEEE Wireless Communications and Networking Conference, WCNC},
abstract = {Light-fidelity (LiFi) is a networked optical wireless communication (OWC) solution to achieve high-speed mobile communications. To address the misalignment challenges encountered in laser-based LiFi, this study introduces an innovative full-coverage indoor LiFi system with integrated communication and positioning capabilities, leveraging intelligent reflected surfaces (IRSs). By design, the proposed system ensures successful wireless downlink connectivity, irrespective of the user's random location and orientation status. An algorithm is developed to ascertain the optimal deployment of both access points (APs) and IRS layers. Moreover, this study introduces a machine learning (ML)-based OWC positioning approach designed to enhance the accuracy of the user positioning, thereby effectively boosting the performance of the IRS-assisted communication system. Numerical results demonstrate the superiority of the proposed positioning approach over traditional methods in terms of average data rate.},
note = {Place: Piscataway, NJ},
keywords = {LiFi, LRDC, machine learning, optical wireless communication (OWC)},
pubstate = {published},
tppubtype = {inproceedings}
}
Qidan, Ahmad Adnan; Soltani, Mohammad Dehghani; Ali, Wajahat; Chen, Rui; Huang, Shenjie; Yosuf, Barzan; Mohamed, Sanaa; Singh, Ravinder; Liu, Yi; Kazemi, Hossein; Sarbazi, Elham; Berde, Bela; Chiaroni, Dominique; Bechadergue, Bastien; Abdeldayem, Fathi; Soni, Hardik; Tabu, Jose; Perrufel, Micheline; Serafimovski, Nikola; El-Gorashi, Taisir E. H.; Crisp, Michael; Penty, Richard; White, Ian H.; Haas, Harald; Safari, Majid; Elmirghani, Jaafar
Indoor Laser-Based Wireless Communications Book Section
In: Ding, Jupeng; Song, Jian; Mu, Penghua; Jia, Kejun (Ed.): Free Space Optics Technologies in B5G and 6G Era - Recent Advances, New Perspectives and Applications, IntechOpen, 2024, ISBN: 978-0-85466-389-7 978-0-85466-388-0.
Abstract | Links | BibTeX | Tags: LRDC
@incollection{ding_indoor_2024,
title = {Indoor Laser-Based Wireless Communications},
author = {Ahmad Adnan Qidan and Mohammad Dehghani Soltani and Wajahat Ali and Rui Chen and Shenjie Huang and Barzan Yosuf and Sanaa Mohamed and Ravinder Singh and Yi Liu and Hossein Kazemi and Elham Sarbazi and Bela Berde and Dominique Chiaroni and Bastien Bechadergue and Fathi Abdeldayem and Hardik Soni and Jose Tabu and Micheline Perrufel and Nikola Serafimovski and Taisir E.H. El-Gorashi and Michael Crisp and Richard Penty and Ian H. White and Harald Haas and Majid Safari and Jaafar Elmirghani},
editor = {Jupeng Ding and Jian Song and Penghua Mu and Kejun Jia},
url = {https://www.intechopen.com/chapters/1167044},
doi = {10.5772/intechopen.1004064},
isbn = {978-0-85466-389-7 978-0-85466-388-0},
year = {2024},
date = {2024-03-01},
urldate = {2024-10-30},
booktitle = {Free Space Optics Technologies in B5G and 6G Era - Recent Advances, New Perspectives and Applications},
publisher = {IntechOpen},
abstract = {Optical wireless communication (OWC) is a strong candidate in the sixth generation (6G) of wireless communications as it can support data transmission at high communication speeds, low power consumption, high security, and high reliability. Near-infrared lasers, specifically vertical cavity surface emitting lasers (VCSELs), exhibit larger modulation bandwidth compared to light-emitting diodes (LEDs), and can provide aggregate data rates ranging up to Terabit per second (Tbps). This chapter proposes innovative optical transmitter and receiver designs for indoor laser-based wireless communications, aiming to provide seamless coverage in high-speed multi-user scenarios. The proposed optical transmitter is based on a 5 × 5 VCSEL array where each VCSEL can provide 10 Gigabit per second (Gbps) in a uniform coverage area of 20 cm x 20 cm, achieving a total of 250 Gbps in an area of 1 m2 at 3 m transmission distance. Moreover, two wide-FOV receiver designs that employ photodetector (PD) arrays in along with imaging or non-imaging optics are introduced to support such an ultra-high-speed optical link. The new design of OWC requires potential techniques to address various networking challenges, including cell formation, interference management, resource allocation, and backhauling. To this end, potential solutions for these challenges are discussed to help establish an end-to-end OWC infrastructure for practical deployment.},
keywords = {LRDC},
pubstate = {published},
tppubtype = {incollection}
}
Fonseca, Dayrene Frometa; Guzman, Borja Genoves; Martena, Giovanni Luca; Bian, Rui; Haas, Harald; Giustiniano, Domenico
Prediction-model-assisted reinforcement learning algorithm for handover decision-making in hybrid LiFi and WiFi networks Journal Article
In: Journal of Optical Communications and Networking, vol. 16, no. 2, pp. 159, 2024, ISSN: 1943-0620, 1943-0639.
Abstract | Links | BibTeX | Tags: LiFi, LRDC
@article{frometa_fonseca_prediction-model-assisted_2024,
title = {Prediction-model-assisted reinforcement learning algorithm for handover decision-making in hybrid LiFi and WiFi networks},
author = {Dayrene Frometa Fonseca and Borja Genoves Guzman and Giovanni Luca Martena and Rui Bian and Harald Haas and Domenico Giustiniano},
url = {https://opg.optica.org/abstract.cfm?URI=jocn-16-2-159},
doi = {10.1364/JOCN.495234},
issn = {1943-0620, 1943-0639},
year = {2024},
date = {2024-02-01},
urldate = {2024-10-30},
journal = {Journal of Optical Communications and Networking},
volume = {16},
number = {2},
pages = {159},
abstract = {The handover process in hybrid light fidelity (LiFi) and wireless fidelity (WiFi) networks (HLWNets) is very challenging due to the short area covered by LiFi access points and the coverage overlap between LiFi and WiFi networks, which introduce frequent horizontal and vertical handovers, respectively. Different handover schemes have been proposed to reduce the handover rate in HLWNets, among which handover skipping (HS) techniques stand out. However, existing solutions are still inefficient or require knowledge that is not available in practice, such as the exact user’s trajectory or the network topology. In this work, a novel machine learning-based handover scheme is proposed to overcome the limitations of previous HS works. Specifically, we have designed a classification model to predict the type of user’s trajectory and assist a reinforcement learning (RL) algorithm to make handover decisions that are automatically adapted to new network conditions. The proposed scheme is called RL-HO, and we compare its performance against the standard handover scheme of long-term evolution (STD-LTE) and the so-called smart handover (Smart HO) algorithm. We show that our proposed RL-HO scheme improves the network throughput by 146% and 59% compared to STD-LTE and Smart HO, respectively. We make our simulator code publicly available to the research community.},
keywords = {LiFi, LRDC},
pubstate = {published},
tppubtype = {article}
}
Deng, Bohua; Chen, Chen; Huang, Haoyu; Li, Yibin; Tang, Yuru; Wei, Zixian; Luo, Yang; Liu, Min; Haas, Harald; Fu, H. Y.
Three-Dimensional Transmission Based UOWC in Complex Underwater Environments Journal Article
In: Journal of Lightwave Technology, pp. 1–13, 2024, ISSN: 0733-8724, 1558-2213.
Links | BibTeX | Tags: LRDC, Optical wireless communication
@article{deng_three-dimensional_2024,
title = {Three-Dimensional Transmission Based UOWC in Complex Underwater Environments},
author = {Bohua Deng and Chen Chen and Haoyu Huang and Yibin Li and Yuru Tang and Zixian Wei and Yang Luo and Min Liu and Harald Haas and H. Y. Fu},
url = {https://ieeexplore.ieee.org/document/10636089/},
doi = {10.1109/JLT.2024.3443351},
issn = {0733-8724, 1558-2213},
year = {2024},
date = {2024-01-01},
urldate = {2024-10-30},
journal = {Journal of Lightwave Technology},
pages = {1–13},
keywords = {LRDC, Optical wireless communication},
pubstate = {published},
tppubtype = {article}
}
Katsaros, Konstantinos; Mavromatis, Ioannis; Antonakoglou, Kostantinos; Ghosh, Saptarshi; Kaleshi, Dritan; Mahmoodi, Toktam; Asgari, Hamid; Karousos, Anastasios; Tavakkolnia, Iman; Safi, Hossein; Hass, Harald; Vrontos, Constantinos; Emami, Amin; Parra-Ullauri, Juan Marcelo; Moazzeni, Shadi; Simeonidou, Dimitra
AI-Native Multi-Access Future Networks—The REASON Architecture Journal Article
In: IEEE Access, vol. 12, pp. 178586–178622, 2024, ISSN: 2169-3536.
Links | BibTeX | Tags: 6G, artificial intelligence (AI), LRDC, Network management and orchestration, REASON
@article{katsaros_ai-native_2024,
title = {AI-Native Multi-Access Future Networks—The REASON Architecture},
author = {Konstantinos Katsaros and Ioannis Mavromatis and Kostantinos Antonakoglou and Saptarshi Ghosh and Dritan Kaleshi and Toktam Mahmoodi and Hamid Asgari and Anastasios Karousos and Iman Tavakkolnia and Hossein Safi and Harald Hass and Constantinos Vrontos and Amin Emami and Juan Marcelo Parra-Ullauri and Shadi Moazzeni and Dimitra Simeonidou},
url = {https://ieeexplore.ieee.org/document/10769448/},
doi = {10.1109/ACCESS.2024.3507186},
issn = {2169-3536},
year = {2024},
date = {2024-01-01},
urldate = {2025-08-27},
journal = {IEEE Access},
volume = {12},
pages = {178586–178622},
keywords = {6G, artificial intelligence (AI), LRDC, Network management and orchestration, REASON},
pubstate = {published},
tppubtype = {article}
}
Zhong, Xin; Chen, Chen; Zhao, Yinan; Liu, Min; He, Cuiwei; Haas, Harald
Dual-mode spatial index modulation for MIMO-OWC Journal Article
In: Optics Letters, vol. 49, no. 2, pp. 334, 2024, ISSN: 0146-9592, 1539-4794.
Abstract | Links | BibTeX | Tags: LRDC, MIMO, Optical wireless communication
@article{zhong_dual-mode_2024,
title = {Dual-mode spatial index modulation for MIMO-OWC},
author = {Xin Zhong and Chen Chen and Yinan Zhao and Min Liu and Cuiwei He and Harald Haas},
url = {https://opg.optica.org/abstract.cfm?URI=ol-49-2-334},
doi = {10.1364/OL.509658},
issn = {0146-9592, 1539-4794},
year = {2024},
date = {2024-01-01},
urldate = {2024-10-30},
journal = {Optics Letters},
volume = {49},
number = {2},
pages = {334},
abstract = {In this Letter, we propose and demonstrate a dual-mode spatial index modulation (DM-SIM) scheme for spectral efficiency enhancement of band-limited multiple-input multiple-output optical wireless communication (MIMO-OWC) systems. By performing dual-mode index modulation in the spatial domain, DM-SIM can transmit both spatial and constellation symbols. Since constellation design plays a vital role in the proposed DM-SIM scheme, we further propose three dual-mode constellation design approaches including phase rotation, amplitude scaling and joint phase rotation and amplitude scaling. Moreover, we also designed a differential log-likelihood ratio (LLR) detector for the proposed DM-SIM scheme. Experimental results show that the joint phase rotation and amplitude scaling approach can achieve a remarkable 3.2 dB signal-to-noise ratio (SNR) gain compared with the phase rotation approach in a 2×2 MIMO-OWC system applying DM-SIM.},
keywords = {LRDC, MIMO, Optical wireless communication},
pubstate = {published},
tppubtype = {article}
}
Eltokhey, Mahmoud Wafik; Bashir, Muhammad Salman; Younus, Othman Isam; Ghassemlooy, Zabih; Haas, Harald; Karagiannidis, George; Teli, Shivani Rajendra; Zvanovec, Stanislav; Khalighi, Mohammad-Ali; Zhang, Zhenyu Charlus; Hranilovic, Steve; Brandt-Pearce, Maïté; Linnartz, Jean-Paul; Trichili, Abderrahmen; Chun, Hyunchae; O'Brien, Dominic; Uysal, Murat; Alouini, Mohamed-Slim
Optical Wireless Communications: Illuminating the Path for Cooper's Law Miscellaneous
2024.
Links | BibTeX | Tags: LRDC, Optical wireless communication
@misc{eltokhey_optical_2024,
title = {Optical Wireless Communications: Illuminating the Path for Cooper's Law},
author = {Mahmoud Wafik Eltokhey and Muhammad Salman Bashir and Othman Isam Younus and Zabih Ghassemlooy and Harald Haas and George Karagiannidis and Shivani Rajendra Teli and Stanislav Zvanovec and Mohammad-Ali Khalighi and Zhenyu Charlus Zhang and Steve Hranilovic and Maïté Brandt-Pearce and Jean-Paul Linnartz and Abderrahmen Trichili and Hyunchae Chun and Dominic O'Brien and Murat Uysal and Mohamed-Slim Alouini},
url = {https://www.techrxiv.org/users/708396/articles/700309-optical-wireless-communications-illuminating-the-path-for-cooper-s-law?commit=aa24e95eedcf894f24fdf42272b0d651fbc6991b},
doi = {10.36227/techrxiv.170620142.21301431/v1},
year = {2024},
date = {2024-01-01},
urldate = {2024-10-30},
publisher = {Preprints},
keywords = {LRDC, Optical wireless communication},
pubstate = {published},
tppubtype = {misc}
}
Li, Juncheng; Huang, Shenjie; Soltani, Mohammad Dehghani; Haas, Harald; Safari, Majid
Laser-Based Indoor Mobile Wireless Communication Aided by Stabilizers Journal Article
In: IEEE Open Journal of the Communications Society, vol. 5, pp. 1–1, 2024, ISSN: 2644-125X.
Abstract | Links | BibTeX | Tags: Journal, LRDC, TOWS
@article{li_laser-based_2024,
title = {Laser-Based Indoor Mobile Wireless Communication Aided by Stabilizers},
author = {Juncheng Li and Shenjie Huang and Mohammad Dehghani Soltani and Harald Haas and Majid Safari},
url = {https://ieeexplore.ieee.org/document/10579847/},
doi = {10.1109/OJCOMS.2024.3420102},
issn = {2644-125X},
year = {2024},
date = {2024-01-01},
urldate = {2024-08-20},
journal = {IEEE Open Journal of the Communications Society},
volume = {5},
pages = {1–1},
abstract = {Laser-based optical wirele scommunication (OWC) can provide multi-Gb/s data rates for future indoor mobile wireless networks. However, due to the directionality of laser beams, the performance of indoor laser-based OWC suffers from the misalignment induced by the random orientation of user devices. To address this challenge, this work proposes the application of stabilizers at the user equipment to mitigate device orientation effects. Additionally, to support user mobility, we present a framework to optimally design receivers employing avalanche photodiode (APD) arrays, thereby providing a broad receiver field-of-view (FoV) while still upholding a wide bandwidth. Experimental measurements are conducted to assess the statistics of the random orientation angles of the user device across five practical movement types, both with and without stabilizers. Several analytical models are developed to precisely approximate the PDFs of the orientations in different scenarios, enabling performance evaluation of stabilizer-assisted OWC in the presence of misalignment. In addition, the trade-off between FoV, bandwidth, and signal-to-noise ratio (SNR) in the APD array-based receivers is analyzed. Based on this analysis, a receiver design algorithm is proposed, aimed at determining the optimal receiver configurations to maximize the achievable data rate given a desired FoV. Our simulation results, based on an indoor uplink high-speed OWC scenario, illustrate the effectiveness of the proposed system in mitigating the effects of misalignment, thereby decreasing the outage probability and enhancing the achievable data rate.},
keywords = {Journal, LRDC, TOWS},
pubstate = {published},
tppubtype = {article}
}
Huang, Yifan; Safari, Majid; Haas, Harald; Tavakkolnia, Iman
Optical Wireless 3-D-Positioning and Device Orientation Estimation Journal Article
In: IEEE Open Journal of the Communications Society, vol. 5, pp. 4519–4530, 2024, ISSN: 2644-125X.
Links | BibTeX | Tags: Journal, LRDC, REASON, TITAN, TOWS
@article{huang_optical_2024,
title = {Optical Wireless 3-D-Positioning and Device Orientation Estimation},
author = {Yifan Huang and Majid Safari and Harald Haas and Iman Tavakkolnia},
url = {https://ieeexplore.ieee.org/document/10585312/},
doi = {10.1109/OJCOMS.2024.3423420},
issn = {2644-125X},
year = {2024},
date = {2024-01-01},
urldate = {2024-08-20},
journal = {IEEE Open Journal of the Communications Society},
volume = {5},
pages = {4519–4530},
keywords = {Journal, LRDC, REASON, TITAN, TOWS},
pubstate = {published},
tppubtype = {article}
}
Chen, Cheng; Huang, Shenjie; Tavakkolnia, Iman; Safari, Majid; Haas, Harald
Spatial and Wavelength Division Joint Multiplexing System Design for MIMO-OFDM Visible Light Communications Journal Article
In: IEEE Access, pp. 1–1, 2024, ISSN: 2169-3536.
Links | BibTeX | Tags: GreenCom, Journal, LRDC, META, TITAN
@article{chen_spatial_2024,
title = {Spatial and Wavelength Division Joint Multiplexing System Design for MIMO-OFDM Visible Light Communications},
author = {Cheng Chen and Shenjie Huang and Iman Tavakkolnia and Majid Safari and Harald Haas},
url = {https://ieeexplore.ieee.org/document/10623642/},
doi = {10.1109/ACCESS.2024.3439407},
issn = {2169-3536},
year = {2024},
date = {2024-01-01},
urldate = {2024-08-20},
journal = {IEEE Access},
pages = {1–1},
keywords = {GreenCom, Journal, LRDC, META, TITAN},
pubstate = {published},
tppubtype = {article}
}