Showing papers by "Frans Huijskens published in 2022"

Passive OFE multi‐Gbps VLC transmission using POF as a feeder line

Abstract: This paper presents a novel in‐home communication system employing plastic optical fibers (POFs) acting both as transmission medium and access point for wireless links to user devices, hence no separate luminaires or optical–electrical–optical conversions is required. All active devices, such as lasers/detectors, can be remotely placed from the room ceilings, resulting in fully passive optical front‐ends, which is beneficial for maintenance and upgrading. We approach two concepts, the first aims to realize small but high‐capacity hotspots in a room, the second creates larger coverage areas to increase the number of users and allow user's mobility. The wavelength division multiplexing concept is used to maximize the wireless throughput and to serve different wireless access points on the ceilings from a single POF feeder. A transmission link comprising eye‐safe transceivers, 1‐mm core diameter step‐index POF, and free space link, achieving multi‐gigabit throughputs using spectral efficient modulation formats, is demonstrated.

Bidirectional Gigabits Per Second Spatial Diversity Link Using POF for Passive Optical Front-Ends

Abstract: This paper presents a novel concept for spatial diversity using plastic optical fibre (POF)-based luminaire transmission for in-home networks. We show the feasibility of an optical transmission system using POFs, acting as optical front-haul, for realizing a high capacity wireless bidirectional link aided by a spatial diversity scheme allowing user mobility around the access points. The light coming out of the 1 mm core diameter step-index POF is highly divergent and, therefore, for each POF-end an optical lens is placed to adjust the size of wireless cells, in order to allow user's mobility or to adjust the number of users served by the access points. Thus, the access points are completely passive, hence no electrical powering is needed, resulting in low maintenance. In addition, active components such as light sources and detectors can be located remotely from the access points and they are connected to each other by POFs. Futhermore, we performed optical wireless experiments with an eye-safe visible light laser and therefore our wireless link is limited to 1.2 m and 45 cm diameter of coverage areas. We obtained multi-Gbps for downlink and uplink and compared the link performance using discrete multitone, pulse amplitude modulation, and Nyquist sub-carrier modulation.

Bi-directional All-Optical Wireless Communication System with Optical Beam steering and Automatic Self-Alignment

Abstract: A Gigabit Ethernet bidirectional OWC system with user-hosted automatic alignment of the upstream beams is demonstrated, using miniature retroreflectors and novel self-alignment algorithm. It provides individual narrow beams for high user densities. TCP measurements show transfer speeds of 940Mbit/s per user within 10 degrees Field-of-View.

Multi-Gigabits per Second Spatial Multiplexing Transmission Using Passive OFE and WDM-over-POF

Abstract: Indoor networks should be simple and enable multi-Gbps wireless links at low costs. Spatial multiplexing links from multiple optical access points using WDM-over-POF feeder and passive optical front ends are presented. Using discrete multitone on two colours we can double the throughput to 5.2 Gbps.

Passive-OFE Spatial Multiplexing Gigabits per Second Transmission Using WDM-over-POF

Abstract: A spatial multiplexing WDM transmission comprising a wired link of thick core step-index POF and a wireless link of 1m is presented. Applying singular value decomposition on experimental data, 4.8 Gbps throughput can be achieved.

Real-time hardware G.hn LiFi infrastructure with D-MIMO and WDM over POF Fronthaul

Abstract: In this paper we report, for the first time, measured performance results of the concatenation between two different plastic optical fibre (POF) fronthaul approaches and distributed multiple-input multiple-output (D-MIMO) LiFi using commercial G.hn chipsets. These integrated circuits (IC)s are capable of performing, among other features, MIMO signal processing, orthogonal frequency-division multiplexing (OFDM) modulation, and adaptive bit-loading, which are important features for LiFi systems. The use of commercially available ICs with the aforementioned features, accelerates the mass market adoption of LiFi technology. We consider the POF fronthaul approaches: spatial division multiplexing (SDM) and wavelength division multiplexing (WDM). POFs are interesting for industrial scenarios due to its electromagnetic interference immunity, their low weight and cost. The measured throughput results show that a WDM POF fronthaul, using a red light-emitting diode (LED) and a green laser diode (LD), has ample throughput to support the D-MIMO LiFi link, which proves the viability of the use of POFs as fronthaul for D-MIMO LiFi systems. Our results give input for possible enhancements to the ITU G.vlc standard G.9991.