Indoor wireless optical communication systems: effect of ambient noise

Mohamed, Nazmi A.; Aly, Asmaa M.; Aboul‐Seoud, A.; Aly, Moustafa H.

doi:10.1117/1.oe.53.5.055109

Cited by 7 publications

(7 citation statements)

References 4 publications

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“…(u) with all elements being positive real-valued, for u = 1, 2 … , U , is said to constitute an MUDCG, if there exist x (u) ,x (u) ∈  (u) such that ∏ U u=1 x (u) = ∏ U u=1x (u) , we have x (u) =x (u) for any u = 1, 2 ⋯ U . Then the product constellation of the MUDCG  (1) ,  (2) , ⋯, and  (U ) is denoted by…”

Section: Discussionmentioning

confidence: 99%

“…x(u) , we have x (u) = x(u) for any u = 1, 2 ⋯ U . Then the product constellation of the MUDCG  (1) ,  (2) , ⋯, and  (U ) is denoted by …”

Section: Discussionmentioning

confidence: 99%

“…Free‐space optical (FSO) communication has been extensively investigated as an efficient solution to short‐range optical communication due to the advantages of low cost, easy deployment, high security and freedom from spectral license [1, 2]. As a non‐coherent transmission communication technology, FSO systems generally adopt intensity modulation and direct detection (IM/DD) from the considerations of implementation complexity, which means that the messages are modulated to the instantaneous intensity of lightwave emitted from the laser transmitters.…”

Section: Introductionmentioning

confidence: 99%

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Transceiver design for MU‐SIMO FSO communication over correlated lognormal channels

et al. 2021

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In this paper, with the assumption of only channel statistics information available at the receivers, a novel concept of multiplicative uniquely decomposable constellations is proposed for multi-user single-input multiple-output (MU-SIMO) FSO systems in weak atmospheric turbulence, which is modeled by spatially dependent lognormal fading channels. The design enables the fast decoding at the users' sides and meanwhile allows flexibility in assigning each user's ordering to meet different priority needs. Simulation results show that our proposed design has a significant performance improvement over the TDMA scheme at the same rates.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Discussionmentioning

confidence: 99%

“…x(u) , we have x (u) = x(u) for any u = 1, 2 ⋯ U . Then the product constellation of the MUDCG  (1) ,  (2) , ⋯, and  (U ) is denoted by …”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transceiver design for MU‐SIMO FSO communication over correlated lognormal channels

et al. 2021

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“…In recent years, they have been ranked among the most important platforms used in ODP applications and for making them cost-effective [1]. PhCs, in this type of application, are compared to famous photonic-based technologies, such as visible light communications (VLC) [2][3][4][5][6][7][8], semiconductor optical amplifiers (SOAs) [9], fiber Bragg grating (FBG) [10][11][12], Mach-Zehnder interferometer (MZI) [13,14], free-space optical communication (FSO) [15,16], and modulators used in optical networks [17]. Characteristics obtained from the photonic domain, including immunity to electromagnetic interference, safety in highly combustible environment, fast response speed, and long-range monitoring, are features that make PhC promising [18,19].…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity Early Detection Biomedical Sensor for Tuberculosis With Low Losses in the Terahertz Regime Based on Photonic Crystal Fiber Technology

et al. 2023

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Tuberculosis is one of the most contagious and lethal illnesses in the world, according to the World Health Organization. Tuberculosis had the leading mortality rate as a result of a single infection, ranking above HIV/AIDS. Early detection is an essential factor in patient treatment and can improve the survival rate. Detection methods should have high mobility, high accuracy, fast detection, and low losses. This work presents a novel biomedical photonic crystal fiber sensor, which can accurately detect and distinguish between the different types of tuberculosis bacteria. The designed sensor detects these types with high relative sensitivity and negligible losses compared to other photonic crystal fiber-based biomedical sensors. The proposed sensor exhibits a relative sensitivity of 90.6%, an effective area of 4.342×10−8m2, with a negligible confinement loss of 3.13×10−9cm−1, a remarkably low effective material loss of 0.0132cm−1, and a numerical aperture of 0.3462. The proposed sensor is capable of operating in the terahertz regimes over a wide range (1 THz–2.4THz). An abbreviated review of non-optical detection techniques is also presented. An in-depth comparison between this work and recent related photonic crystal fiber-based literature is drawn to validate the efficacy and authenticity of the proposed design.

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“…The associate editor coordinating the review of this manuscript and approving it for publication was Sukhdev Roy. light communications (VLC) [13]- [19], and modulators used in optical networks [20]. Recently, PhC are widely used in several optical data processing applications as: a resonator [21], [22], coupler [23], channel drop filters [24], [25], optical modulators [26], oscillators [27], switches [28], logic gates [29]- [31], adders [32], [33], subtractors [34], [35], encoders [36], and sensors.…”

Section: Introductionmentioning

confidence: 99%

Literature Review: On-Chip Photonic Crystals and Photonic Crystal Fiber for Biosensing and Some Novel Trends

et al. 2022

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This review summarizes recent advances in sensors based on photonic crystal technologies for biomedical sensing applications. Photonic crystal sensing offers enormous promise due to their clear benefits in sensitivity, stability, compactness, portability. This work discusses several photonic crystal structures, such as photonic crystal waveguides, cavities, and photonic crystal fiber for biomedical sensing applications. The uniqueness, measurement technique, and biosensing properties of each type of these structures are discussed. Furthermore, manufacturing and functionally relevant properties that include design simplicity, compactness, and multi-wavelength operation are also reviewed. They are explored, organized, and compared using the most recent related literature in this field. Finally, a brief of novel trends has been introduced.INDEX TERMS Biomedical sensors, photonic crystals, photonic crystal fiber.

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Indoor wireless optical communication systems: effect of ambient noise

Cited by 7 publications

References 4 publications

Transceiver design for MU‐SIMO FSO communication over correlated lognormal channels

Transceiver design for MU‐SIMO FSO communication over correlated lognormal channels

High-Sensitivity Early Detection Biomedical Sensor for Tuberculosis With Low Losses in the Terahertz Regime Based on Photonic Crystal Fiber Technology

Literature Review: On-Chip Photonic Crystals and Photonic Crystal Fiber for Biosensing and Some Novel Trends

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