Indoor High-Bandwidth Optical Wireless Links for Sensor Networks

Fadlullah, Jarir; Kavehrad, M.

doi:10.1109/jlt.2010.2076775

Cited by 25 publications

(15 citation statements)

References 20 publications

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“…The root mean square delay spread ( ) is a good measure of signal spread due to temporal dispersion. The delay spread of an impulse response is given by [8], [18]:…”

Section: System Modelmentioning

confidence: 99%

“…The second is the multipath dispersion associated with reflections from walls, ceiling and room surfaces and the non-line-of-sight (non-LOS) transmission of optical wireless (OW) signals. Various techniques have recently been proposed to combat the impairments of IR systems, and higher bit rates have been achieved [9]- [18]. Adaptive multi-beam OW links can provide high-speed communication with the potential for achieving data rates well beyond 10 Gb/s [9]- [12], with full mobility.…”

Section: Introductionmentioning

confidence: 99%

“…However, such high data rates have yet to be experimentally demonstrated. Experimental multi-gigabits IR systems with limited mobility have been successfully demonstrated in [13]- [18]. Our goal in this paper is to achieve high data rates when the VLC system / lighting is switched off, by employing a hybrid system (HDIrT) coupled with a custom design imaging receiver.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid diffuse IR transmitter supporting VLC systems with imaging receivers

Alresheedi

Hussein

Elmirghani

2016

2016 18th International Conference on Transparent Optical Networks (ICTON)

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Indoor visible light communication (VLC), using white-LED lighting, generally assumes lights are ON during communications. In this paper, we propose a new Hybrid diffuse Infrared transmitter (HDIrT) coupled with an imaging receiver to support VLC system when the light is dimmed or is totally turned off. Infrared (IR) optical communications boasts similar advantages as VLC systems. It can also provide high transmission rates. The ultimate goal of our proposed system is to increase the signal to noise ratio (SNR), mitigate the channel delay spread and the effect of inter-symbol-interference (ISI) when the system operates at a high data transmission rate. The delay spread is reduced from 1.55 ns to about 0.1 ns when a narrow field-of-view (FOV) imaging receiver replaces a wide FOV non-imaging receiver. At a higher data rate of 2.5 Gb/s, the simulation results show that the imaging HDIrT system achieves about 17 dB SNR in the presence of multipath dispersion, receiver noise and mobility.

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“…The root mean square delay spread ( ) is a good measure of signal spread due to temporal dispersion. The delay spread of an impulse response is given by [8], [18]:…”

Section: System Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hybrid diffuse IR transmitter supporting VLC systems with imaging receivers

Alresheedi

Hussein

Elmirghani

2016

2016 18th International Conference on Transparent Optical Networks (ICTON)

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“…Multi-beam OW links offer the opportunity for high-speed communications and the potential to achieve data rates up to 10 Gb/s with full mobility, although these have not been demonstrated to date experimentally [8], [10]. Experimental multi-gigabits OW systems with limited mobility have been successfully demonstrated in [13]- [16]. Despite the significant progress achieved to date, more research is required to enable the design of OW systems that realize the potential bandwidth and data rates possible in these systems.…”

Section: Introductionmentioning

confidence: 99%

Hologram Selection in Realistic Indoor Optical Wireless Systems With Angle Diversity Receivers

Alresheedi

Elmirghani

2015

J. Opt. Commun. Netw.

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-In this paper, we introduce a new adaptive optical wireless system that employs a finite vocabulary of stored holograms. We propose a fast delay, angle and power adaptive holograms (FDAPA-Holograms) approach based on a divide and conquer methodology and evaluate it with angle diversity receivers in a mobile optical wireless (OW) system. The ultimate goal is to increase the signal to noise ratio (SNR), reduce the effect of inter-symbol-interference (ISI), and eliminate the need to calculate the hologram at each transmitter and receiver location. A significant improvement is achieved in the presence of very directive background illumination noise, receiver noise, multipath propagation, mobility, and shadowing typical in a realistic indoor environment. The combination of beam delay, angle and power adaptation offers a degree of freedom to the link design, resulting in a system that is able to achieve higher data rates (5 Gb/s). At a higher data rate of 5 Gb/s, and under eye safety regulations, the proposed FDAPAHolograms system offers around 13 dB SNR with full mobility in a realistic environment where shadowing exists. The fast search algorithm introduced based on divide and conquer (D&C) reduces the computation time required to identify the optimum hologram. Simulation results show that the proposed system, FDAPA-Holograms, can reduce the time required to identify the optimum hologram position from taken by a classic adaptive hologram to about .---

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“…In this paper, an alternative solution for BANs is proposed, using optical wireless technology to realize an "on-body to onbody" communication. The optical wireless communications have been intensively studied for both indoor and outdoor applications in recent years, because this technology offers several advantages such as high bandwidth, low complexity, and high security [6][7][8][9][10][11][12]. Even if it has been investigated in the field of sensor networks [9][10], as far as known, it is still not the case concerning the "on-body" networks.…”

Section: Introductionmentioning

confidence: 99%

Investigation of wireless optical technology for communication between on-body nodes

Chevalier

Sahuguède

Julien-Vergonjanne

et al. 2013

2013 2nd International Workshop on Optical Wireless Communications (IWOW)

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Abstract-Interferences in Body Area Networks (BANs) are a great challenge in order to ensure a good quality of service in health monitoring systems. BANs are disturbed by several kinds of wireless communications, as mobile cells or Wi-Fi systems. Thus the wireless optical technology could be considered as a solution to reduce the interference amount. The validity of such a solution is examined in terms of transmitted power and data rate. The novelty of this paper is that this is the first time where diffuse optical wireless technology is considered to achieve "on body" communication, using the multiple reflections of optical beams in the patient room.

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Indoor High-Bandwidth Optical Wireless Links for Sensor Networks

Cited by 25 publications

References 20 publications

Hybrid diffuse IR transmitter supporting VLC systems with imaging receivers

Hybrid diffuse IR transmitter supporting VLC systems with imaging receivers

Hologram Selection in Realistic Indoor Optical Wireless Systems With Angle Diversity Receivers

Investigation of wireless optical technology for communication between on-body nodes

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