Visible light communication using OLEDs: Illumination and channel modeling

Chun, Hyunchae; Chiang, Chien-Jung; O’Brien, Dominic

doi:10.1109/iwow.2012.6349685

Cited by 32 publications

(26 citation statements)

References 12 publications

(19 reference statements)

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“…We assumed the sunlight ambient noise as background noise having value P n = 43 nW/m 2 /Sr/nm and σ = 5∗10 −12 A/Hz is the amplifier noise. We estimated SNR at different data rates . Since we have taken LOS intensity values, so we left out the power received due to reflections.…”

Section: Practical Implementation Of a Reconfigurable Optical‐radio Nmentioning

confidence: 99%

Reconfigurable optical‐radio wireless networks: Meeting the most stringent requirements of future communication systems

Saud

Ahmed

Kumpuniemi

et al. 2019

Trans Emerging Tel Tech

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In this paper, we propose a reconfigurable optical‐radio wireless network characterized by high flexibility and performance. The hybrid network can be dynamically configured, adapting itself to the changing requirements of users or operating environments, dynamics of the transmission medium, and availability of resources. First, the basic concept, system architecture, and key operating modes are introduced. Possible operating scenarios and their relationship to the operating modes are discussed. Then, a practical implementation of the hybrid network is introduced, describing the network components, architecture, modulation scheme, and implementation technologies. Implementation was carried out using mostly off‐the‐shelf components and universal software radio peripheral blocks. Particular attention has been put in implementing a fast handover mechanism between modes, an essential requirement for seamless network reconfiguration. Network performance is evaluated and different switching approaches are compared. The paper demonstrates practically the proposed concept based on dynamic system reconfiguration. For the implementation, a mode switching algorithm was developed making decisions based on the quality of the wireless channels. The system was tested with live video packets transmitted through the network. System performance was assessed through data throughput and packet loss measured for different modulation parameters. The proposed concept, essentially a software‐defined hybrid network, is flexible and makes efficient use of radio resources. Moreover, the network has the potential to achieve high performance. All these characteristics make reconfigurable optical‐radio networks an attractive candidate for fifth generation and beyond.

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Section: Practical Implementation Of a Reconfigurable Optical‐radio Nmentioning

confidence: 99%

Reconfigurable optical‐radio wireless networks: Meeting the most stringent requirements of future communication systems

Saud

Ahmed

Kumpuniemi

et al. 2019

Trans Emerging Tel Tech

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“…Basically, MMC assumes that the rays in each point of reflection contribute in the receiver with a LOS component. MMC was first applied to the IR spectrum and later extended to the visible light spectrum . Since MMC gained lot of interests after its introduction, several studies were carried out to include different type of transmitters, receivers, and reflecting surfaces.…”

Section: Review Of Channel Modeling For Optical Wireless Communicationsmentioning

confidence: 99%

“…Many previous VLC channel modeling works, adapted from infrared (IR) channel models, have been reported in the literature . There exist, however, significant differences between VLC and IR communications that should be taken into account on channel modeling.…”

Section: Introductionmentioning

confidence: 99%

“…Many previous VLC channel modeling works, adapted from infrared (IR) channel models, have been reported in the literature. [6][7][8][9][10][11][12] There exist, however, significant differences between VLC and IR communications that should be taken into account on channel modeling. For example, unlike an IR emitter, where the signal is considered monochromatic, the signal generated by VLC emitters can also be polychromatic.…”

Section: Introductionmentioning

confidence: 99%

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A generalized multi‐wavelength propagation model for VLC indoor channels using Monte Carlo simulation

Ramírez-Aguilera

Luna-Rivera

Guerra

et al. 2018

Trans Emerging Tel Tech

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In this paper, we introduce the Matrix‐MMC propagation model for indoor wireless optical channels. This proposed method is evolved from the modified Monte Carlo (MMC)–based ray tracing algorithm, but in addition to the properties of MMC, it has the capability of capturing reflection phenomena implying changes on wavelength (eg, fluorescence, phosphorescence, or iridescence) with a simplified analytical expression. The model provides unprecedented information about the mechanism of surface reflection in a visible light communication channel, which influences the propagation of the light waves, that depends on wavelength.

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“…In the current literature, the channel models developed for infrared (IR) in the past [7]- [9] are used for the performance evaluation of VLC systems without a solid justification [10]- [12]. However, it is known that visible light and IR bands exhibit different characteristics [13] and this necessitates the development of VLC channel models.…”

Section: Introductionmentioning

confidence: 99%

Ray tracing based channel modeling for visible light communications

Sarbazi

Uysal

Abdallah

et al. 2014

2014 22nd Signal Processing and Communications Applications Conference (SIU)

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Özetçe -Bu bildiride, Zemax 13 yazılımı aracılıgı ile görünür ışık haberleşmesi (visible light communication, VLC) kanalları karakterize edilecektir. Yaklaşımımızda, ölçülerini tanımlayacagımız iç mekân ortamı üçboyutlu olarak Zemax 'da oluşturulmakta ve LED tabanlı ışık kaynakları uygun noktalara yerleştirilmektedir. Sözkonusu yazılımım ışın izleme (ray tracing) araçları kullanılarak, alıcı tarafa dogrudan ve dolaylı yollardan (yansımalar) ulaşan sinyallerin gücü ve gecikme süreleri hesaplanmaktadır. Daha sonra bu bilgiler Matlab 'a aktarılarak uygun normalleştirmeler aracılıgı ile bu iç mekan propagasyon ortamına karşılık gelen kanal dürtü cevabı elde edilmektedir. Bu yöntem izlenerek, degişik ebatlardaki odalarda farklı alıcı/verici yerleşimleri varsayımları altında kanal dürtü cevapları elde edilmiş ve gecikme yayılımı, DC kazancı vb kanal parametreleri hesaplanmıştır. Anahtar Kelimeler-Görünür Işık Haberleşmesi, Kanal Modelleme, Işınİzleme.Abstract-In this paper, we characterize visible light communication channels through Zemax 13 software. In our approach, we create a three dimensional indoor environment with specified dimensions in Zemax and integrate the lighting source (i.e., LED). Using the ray tracing features of Zemax , we compute the received optical power and the delays of direct/indirect rays. This information is then imported into Matlab and the corresponding channel impulse response (CIR) for that environment is obtained through proper normalizations. Following this methodology, we present CIRs for a number of rooms with different sizes assuming different transmitter/receiver locations and quantify channel parameters such as mean excess delay, RMS delay spread and DC gain.

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Visible light communication using OLEDs: Illumination and channel modeling

Cited by 32 publications

References 12 publications

Reconfigurable optical‐radio wireless networks: Meeting the most stringent requirements of future communication systems

Reconfigurable optical‐radio wireless networks: Meeting the most stringent requirements of future communication systems

A generalized multi‐wavelength propagation model for VLC indoor channels using Monte Carlo simulation

Ray tracing based channel modeling for visible light communications

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