A5077179982- Semiconductor Lasers and Optical Devices
- Optical Wireless Communication Technologies
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Photonic and Optical Devices
- Advanced Optical Network Technologies
- Indoor and Outdoor Localization Technologies
- Advanced Optical Sensing Technologies
- Power Line Communications and Noise
- Optical Coherence Tomography Applications
- Bluetooth and Wireless Communication Technologies
- Advanced Wireless Communication Technologies
- Analog and Mixed-Signal Circuit Design
- Advancements in PLL and VCO Technologies
- IoT Networks and Protocols
- PAPR reduction in OFDM
- Advanced Fiber Optic Sensors
- Advanced MEMS and NEMS Technologies
- IoT and Edge/Fog Computing
- Radio Frequency Integrated Circuit Design
- Interconnection Networks and Systems
- Software-Defined Networks and 5G
- Semiconductor materials and devices
- Advanced Wireless Communication Techniques
- Non-Invasive Vital Sign Monitoring
Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute
2015-2024
Technische Universität Berlin
2016-2017
Fraunhofer Society
2009-2010
We report a visible-light wireless point-to-point communication link operating at 513 Mbit/s gross transmission rate (net Mbit/s). The bit-error ratio of the uncoded data was smaller than for an illumination level lx. based on commercial thin-film high-power phosphorescent white LED, avalanche photo diode, and off-line signal processing discrete multitone signals. Quadrature-amplitude modulation, bit- power-loading, as well symmetrical clipping were successfully employed in pushing beyond...
This article presents recent achievements and trends in high-speed indoor visible light communication (VLC) research. We address potential applications future visions for the VLC technology, where transport of information is "piggybacked" on original lighting function LED-based lamps. To mature this technology transfer it into practice, our research focused real-time implementation trials. For first time, a bidirectional prototype achieving data rates up to 500 Mb/s presented. system paves...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text J. Vučić, C. Kottke, K. Habel, and Langer, "803 Mbit/s Visible Light WDM Link based DMT Modulation of a Single RGB LED Luminary," in Optical Fiber Communication Conference/National Optic Engineers Conference 2011, OSA Technical Digest (CD) (Optica Publishing Group, 2011), paper OWB6. Export BibTex Endnote (RIS) HTML Plain alert Save article
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Spectrally efficient data transmission with white light-emitting diodes (LEDs) is a topic of increasing interest. In this letter, we report visible light communication link operating at 200<formula formulatype="inline"><tex Notation="TeX">${+}$</tex></formula> Mb/s net rate (230<formula gross) bit-error ratio for uncoded below <formula formulatype="inline"> <tex...
We report a first indoor wireless visible-light link operating up to 230 Mbit/s by use of on-off-keying and with bit-error-ratios below 2·10−3. The results were achieved for illuminance levels recommended lighting standards.
We propose a sliceable bandwidth variable transceiver (S-BVT) architecture suitable for metro/regional elastic networks and highly scalable data center applications. It adopts multicarrier modulation, either OFDM or DMT, cost-effective optoelectronic front-end. The high-capacity S-BVT is programmable, adaptive, reconfigurable by an SDN controller efficient resource usage, enabling unique granularity, flexibility, grid adaptation, even in the conventional fixed-grid networks. experimentally...
Precise position information is considered as the main enabler for implementation of smart manufacturing systems in Industry 4.0. In this article, a time-of-flight based indoor positioning system LiFi presented on ITU - T recommendation G.9991. Our objective to realize by reusing already existing functions communication protocol which has been adopted several vendors. algorithm coarse timing measurement using frame synchronization preamble, similar ranging, and fine channel estimation...
We report the first Gigabit-range visible light link based on off-the-shelf RGB-type white LEDs. By application of WDM and DMT modulation an aggregate rate 1.25 Gbit/s within FEC 2·10−3 limit has been reached at illumination levels recommended by lighting standard for working environment.
High speed single channel DMT operation of a directly modulated 850 nm VCSEL with 26 GHz bandwidth is presented. Successful transmission 161, 152, 135 Gb/s over 10, 300, 550 m OM4 MMF demonstrated at the SD-FEC BER limit.
We present a concept for networked optical wireless communications, also denoted as LiFi, to meet the requirements of industrial applications. These are primarily mobility support with moderate data rates per device, reliable real-time communication, and integrated positioning. describe distributed multiuser multiple-input multiple-output architecture, serving mobile devices via an infrastructure. The system consists central unit, being connected number frontends covering larger area. Our...
In this paper, we present experimental results on optical wireless transmission using commercially available phosphorescent white-light LEDs. To the best of our knowledge, demonstrate for first time visible-light links operating at rates up to 200 Mb/s over typical room distances and reasonable bit-error-ratios. The experiments were performed filtering receiver on-off-keying as well discrete multi-tone modulation combined with off-line processing. Moreover, briefly discuss fields...
Digital-to-analog converters (DACs) for high-speed optical communication systems based on CMOS technology have bandwidths lower than nowadays electro-optic components. A promising concept to circumvent this bottleneck is the frequency-interleaved DAC (FI-DAC) concept. In paper, experimental results application of a 180 GS/s FI-DAC with 40 GHz analog bandwidth two DACs in link are discussed and compared simulation results. Thereby, phase power mismatches, spectral overlap, clipping required...
In today's fiber-optic communication systems, the bandwidth of photonic components, i.e. modulators and photo diodes, is way greater than that their electrical counterparts, digital-to-analog converters (DACs) analog-to-digital (ADCs). order to increase transmission capacity, limitations need be overcome. We review progress recent results in field high-speed DACs, which are desirable for software-defined transmitters. Furthermore, we evaluate interleaving concepts regarding ability overcome...
This paper reviews the main experimental results achieved by our research group in area of high-speed wireless visible light communication (VLC). Depending on modulation complexity and receiver sensitivity, various links operating at rates range 10 - 800 Mbit/s have been demonstrated using off-the-shelf optical components.
We propose a new system concept for LiFi in industrial wireless applications. A distributed multi-user multiple-input multiple-output (MU-MIMO) architecture is used, enabling seamless mobility, reliable low-latency communications, and integration with positioning 5G.
We present high-speed single-channel discrete multitone (DMT) operations of directly modulated 850-nm vertical-cavity surface-emitting lasers (VCSEL). Successful transmission 135 Gb/s over 10 m OM4 multi-mode fiber (MMF) and 114 550 is demonstrated below the 7 % overhead hard-decision forward error correction (FEC) bit rate (BER) limit. At higher BER limits, i.e. 20 soft-decision FEC, which are arising interest for these short-range links, data rates up to 161 presented. This enabled by...
Today's Internet of Things (IoT), covering any communication between devices, is narrowband and not always provides reliability low latency at the same time. A wide range future IoT applications, i.e. flexible manufacturing, augmented reality autonomous cars, will use artificial intelligence in cloud to process sensor data jointly real This need mobile providing high bandwidth, reliable connectivity While radio spectrum densely populated, light (LC) can unlicensed optical enable rates over...
Researches have been conducted on Optical Wireless Communication (OWC) technology for a decade now, and because of the complexity, it naturally took long way to become applicable practical use cases. Current access systems are not sufficient meet continuously increasing demand network performance various applications. Visible Light (VLC) is form OWC which specialized visible light. It promising innovation as exploits new spectrum having favorable propagation interference characteristics This...
For the first time, we show an implementation of a real-time DMT-based system operating at 100 Mbit/s over visible-light link using low-cost commercially available white LED devised for illumination. Additionally, demonstrate transmission video signal this link.
Communication is the fundamental requirement for smart manufacturing. Due to rough environment and several other boundary conditions of manufacturing, such as flexible structures movable machines, radio communication technologies are suffering due physical effects fading, reflection, attenuation range. Light Fidelity (LiFi) a networked optical wireless (OWC) system an alternative communications. It enables both, communications positioning. In this paper, we introduce requirements on systems...
The Internet of Things currently is predominantly narrowband and cannot always guarantee high reliability low latency. Future IoT applications such as flexible manufacturing, augmented reality self-driving vehicles need sophisticated real-time processing units in the cloud to which mobile devices are connected. These high-capacity links meet requirements upcoming 6G systems be facilitated by current communication infrastructure. Light communication, also denoted LiFi, offers huge amounts...