Tropospheric impairments: Measurements and mitigation

Acharya, Rajat

doi:10.1016/b978-0-12-809732-8.00007-7

Cited by 14 publications

(12 citation statements)

References 32 publications

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“…This value will actually tell us what the typical nature of the channel is, given the specified accuracy and availability. That is, at this value, communication can usually be successful with the right modulation and encoding [13]. Fig.…”

Section: B Basics Of Acmmentioning

confidence: 98%

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Supporting Adaptive Coding and Modulation Techniques for Satellite Radio Channel

Makara¹,

Csurgai-Horváth²

2023

1st Workshop on Intelligent Infocommunication Networks, Systems and Services

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For satellite-Earth communications, higher frequency bands, especially with millimeter wavelength frequencies are very sensitive to precipitation and other atmospheric changes. The time variation of these effects is extremely variable, eventually increasing the current attenuation of the channel. Taken together, these phenomena may significantly reduce the momentary capacity of the channel. The primary goal is to transfer as much data as possible correctly on a given link, which means that the optimal protocol should be used at each time step.The current research is built around two main pillars: on the one hand, it takes stock of existing methods for ACM problems in satellite communications, and; on the other hand, we investigated how to implement state estimation for real interconnections. This was based on actual measurements from the Alphasat satellite. The ModCod settings for DVB-2 transmission are estimated from the beacon signal transmitted by the spacecraft. For the implementation, we used a deep neural network with memory, the results of which can be used as a basis for future tests to solve similar problems.

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Section: B Basics Of Acmmentioning

confidence: 98%

“…In the millimeter wavebands, tropospheric effects are the most dominant in terms of attenuation. However, other phenomena are also important to note, the key factors affecting the quality of the connection is [4], [5], [12], [13]:…”

Section: A Satellite Radio Channel Main Parametersmentioning

confidence: 99%

Supporting Adaptive Coding and Modulation Techniques for Satellite Radio Channel

Makara¹,

Csurgai-Horváth²

2023

1st Workshop on Intelligent Infocommunication Networks, Systems and Services

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“…These parameters quantify the mass of precipitation impacting the surface. The total volume can be approximated by considering the particles as spheres [46], and the concentration number N d can be obtained through disdrometer data [47]:…”

Section: Snow Accretion Modelmentioning

confidence: 99%

Towards a Model of Snow Accretion for Autonomous Vehicles

Carvalho,

Moradi,

Hosseinnouri

et al. 2024

Atmosphere

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Snow accumulation on surfaces exposed to adverse weather conditions has been studied over the years due to a variety of problems observed in different industry sectors, such as aeronautics and wind and civil engineering. With the growing interest in autonomous vehicles (AVs), this concern extends to advanced driver-assistance systems (ADAS). Weather stressors, such as snow and icing, negatively influence the sensor functionality of AVs, and their autonomy is not guaranteed by manufacturers during episodes of intense weather precipitation. As a basis for mitigating the negative effects caused by heavy snowfall, models need to be developed to predict snow accumulation over critical surfaces of AVs. The present work proposes a framework for the study of snow accumulation on road vehicles. Existing icing and snow accretion models are reviewed, and adaptations for automotive applications are discussed. Based on the new capabilities developed by the Weather on Wheels (WoW) program at Ontario Tech University, a model architecture is proposed in order to progress toward adequate snow accretion predictions for autonomous vehicle operating conditions, and preliminary results are presented.

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“…39,[244][245][246] Despite recent advancements, NP-induced scattering of the incident light presents a significant drawback for the fluorescence method as scattering loss increases sharply with increasing particle diameter. 247…”

Section: Fluorescence-based Hydrogel Optical Fiber Sensorsmentioning

confidence: 99%