HBO Kennisbank

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Zocht je misschien: speciaal, spectra, efficient?

Improving Spectral and Power Efficiencies of a MISO-VLC System via Hybrid Multi-Objective Optimization

Rocha, Helder; Pontes, Maria; Segatto, Marcelo; Wörtche, Heinrich (Sensors And Smart Systems); Silva, Jair; Da Silva Costa, Wesley (Sensors And Smart Systems)

This study presents a methodology designed to optimize various parameters of each access point within a Multiple-Input Single-Output (MISO) Visible Light Communication (VLC) system. The primary objective is to enhance both power and spectral efficiencies. A MISO-VLC model is presented based on experimental …

2024-08-23AlgemeenConferentiebijdrage

A Performance Comparison of OFDM and Pulsed PHY Modulations in Optical Wireless Communications

Hinrichs, Malte; Costa, Wesley; Rocha, Helder; Pontes, Maria; Segatto, Marcelo; Paraskevopoulos, Anagnostis; Jungnickel, Volker; Freund, Ronald; Silva, Jair

In this paper, we experimentally compare orthogonal frequency-division multiplexing (OFDM) and on-off keying (OOK) modulation in the context of the IEEE 802.15.13-2023 standard at bandwidths up to 50 MHz across a Li-Fi link with distances up to 5 m and a lateral offset up to 51°. Error vector magnitude …

2023-12-12AlgemeenConferentiebijdrage

Toward AI-Enhanced VLC Systems for Industrial Applications

Da Silva Costa, Wesley; Camporez, Higor; Hinrichs, Malte; Rocha, Helder; Pontes, Maria; Segatto, Marcelo; Paraskevopoulos, Anagnostis; Jungnickel, Volker; Freund, Ronald; Lima Silva, J.A.

In this paper, artificial intelligence tools are implemented in order to predict trajectory positions, as well as channel performance of an optical wireless communications link. Case studies for industrial scenarios are considered to this aim. In a first stage, system parameters are optimized using a …

2023-02-15AlgemeenArtikel

Increasing the power and spectral efficiencies of an OFDM-based VLC system through multi-objective optimization

Da Silva Costa, Wesley; Camporez, Higor; Pontes, Maria; Segatto, Marcelo; Rocha, Helder; Silva, Jair; Hinrichs, Malte; Paraskevopoulos, Anagnostis; Jungnickel, Volker; Freund, Ronald

The nonlinearity induced by light-emitting diodes in visible light communication (VLC) systems presents a challenge to the parametrization of orthogonal frequency division multiplexing (OFDM). The goal of the multi-objective optimization problem presented in this study is to maximize the transmitted …

2023AlgemeenArtikel

Energy calibration procedure of a pixel detector

L.H. Arntzen (Begeleider); C.A. Swarts (Begeleider); R.P.M. van der Boog (Student)

In the medical community, X-rays are an important tool in imaging the human body. In principle X-ray images are 2 dimensional images. By measuring such X-ray images at multiple angles, one can construct the 3 dimensional inner structure of the sample. This 3 dimensional structure is created by applying …

2013TechniekBachelor

Design of a NIR concentrator system integrated in a greenhouse

Pieter Sonneveld; Gert-Jan Swinkels; H.J.J. Janssen; Elisa van Tuijl

In this paper the design and development of a new type of greenhouse with an integrated filter for reflecting near infrared radiation (NIR) and a solar energy delivery system is described. Especially the optical parts as the spectral selective film, the properties of the circular reflector and the efficiencies …

2012AlgemeenArtikel

Design of a Solar Greenhouse with Energy Delivery by the Conversion of Near Infrared Radiation - Part 1 Optics and PV-cells

Gert-Jan Swinkels; Pieter Sonneveld; G. Bot

2009AlgemeenArtikel

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