Fade slope analysis for Ku‐band earth‐space communication links in Malaysia

Jong, Siat Ling; Riva, C.; Din, Jafri; D’Amico, M.; Lam, Hong Yin

doi:10.1049/iet-map.2018.6023

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…In other words, the intense rainfall causing attenuation peaks fades away slower at its end than at its onset, therefore, the long time-scale (several minutes) positive rates of change of attenuation are larger than the negative ones. This behavior at zenith paths is significantly different of that occurring in slant paths for which the magnitude of positive and negative rates of change are statistical identical, according to the experimental results [35][36][37][38][39][40] and modeling [41].…”

Section: Examples Of Theoretical Application To Time Series 𝐴(𝑡)mentioning

confidence: 60%

A Small Power Margin and Bandwidth Expansion Allow Data Transmission During Rainfall Despite Large Attenuation: Application to GeoSurf Satellite Constellations at mm–Waves

Matricciani

2024

Preprint

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The traditional approach of considering the probability distribution of rain attenuation leads to overdesign the power margin of data channels. We have first recalled a method, proposed in 2016, which with a small power margin, bandwidth expansion and variable symbol rate avoids overdesign and can transfer the same data volume as if the link were in clear–sky conditions. It is charaterized only by the link mean efficiency 0≤η≤1, suitably defined. It is usefull only if: (a) data must be downloaded also when it is raining; (b) real–time communication is not strictly required. We have applied it to the links of GeoSurf satellite constellations by simulating rain attenuation time series at 80 GHz (mm–wave) with the Synthetic Storm Technique, from rain-rate time series recorded on–site, at sites located in different climatic regions. The power margin to be implemented ranges from 2.0 dB to 7.4 dB – well within the current technology – regardless the instantaneous rain attenuation. The clear–sky bandwidth is expanded 1.75 to 2.80 times, not large per se, but it may challenge current technology if the clear–sky bandwidth is already large.

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Section: Examples Of Theoretical Application To Time Series 𝐴(𝑡)mentioning

confidence: 60%

A Small Power Margin and Bandwidth Expansion Allow Data Transmission During Rainfall Despite Large Attenuation: Application to GeoSurf Satellite Constellations at mm–Waves

Matricciani

2024

Preprint

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“…Since rain characteristics differ significantly over tropical regions, widely used ITU-R models are insufficient for predicting rain attenuation and modeling related propagation impairments [129]. Similar to the rain attenuation model, different variants of rain fade slope models are proposed for tropical climatic conditions [130]. By definition, the fade slope can be defined in [130] as Equation (52).…”

Section: Fade Slope Modelmentioning

confidence: 99%

“…Similar to the rain attenuation model, different variants of rain fade slope models are proposed for tropical climatic conditions [130]. By definition, the fade slope can be defined in [130] as Equation (52). The same technique is reported in [131] with consideration of the ∆t to be 2 s. A typical fade slope diagram is shown in Figure 5.…”

Section: Fade Slope Modelmentioning

confidence: 99%

A Survey of Rain Fade Models for Earth–Space Telecommunication Links—Taxonomy, Methods, and Comparative Study

2021

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Satellite communication is a promising transmission technique to implement 5G and beyond networks. Attenuation due to rain begins at a frequency of 10 GHz in temperate regions. However, some research indicates that such attenuation effects start from 5–7 GHz, especially in tropical regions. Therefore, modeling rain attenuation is significant for propagating electromagnetic waves to achieve the required quality of service. In this survey, different slant link rain attenuation prediction models have been examined, classified, and analyzed, and various features like improvements, drawbacks, and particular aspects of these models have been tabulated. This survey provides various techniques for obtaining input data sets, including rain height, efficient trajectory length measurement techniques, and rainfall rate conversion procedures. No survey of the Earth–space link models for rain attenuation is available to the best of our knowledge. In this study, 23 rain attenuation models have been investigated. For easy readability and conciseness, the details of each model have not been included. The comparative analysis will assist in propagation modeling and planning the link budget of slant links.

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“…In the last few years, many studies were published on fade slope. However, most of these studies were either conducted in temperate regions [3][4][5][6][7] or dealing with earth to satellite links only [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Analysis of rain fade slope for terrestrial links

Chebil

Zyoud

Habaebi

et al. 2020

IJEECS

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Rainfall can cause severe degradation to the operation of microwave links working with frequencies above 10 GHz. Many studies have investigated this problem, and one of the factors that attract the attention of researcher is rain fade slope which is the rate of change of rain attenuation. The focus of this study is on rain fade slope for terrestrial links and it is based on measurement conducted in Malaysia. This paper investigates the characteristics of the measured rain fade slope distribution for various attenuation levels. Then, the ITU-R model for rain fade slope is compared with the corresponding statistics obtained from the measured data. Significant discrepancies have been observed since the ITU-R prediction model does not fit the measured fade slope distribution for many attenuation levels. It is recommended to modify the expression of the standard deviation in the ITU-R model when implemented in tropical regions.

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Fade slope analysis for Ku‐band earth‐space communication links in Malaysia

Cited by 6 publications

References 14 publications

A Small Power Margin and Bandwidth Expansion Allow Data Transmission During Rainfall Despite Large Attenuation: Application to GeoSurf Satellite Constellations at mm–Waves

A Small Power Margin and Bandwidth Expansion Allow Data Transmission During Rainfall Despite Large Attenuation: Application to GeoSurf Satellite Constellations at mm–Waves

A Survey of Rain Fade Models for Earth–Space Telecommunication Links—Taxonomy, Methods, and Comparative Study

Analysis of rain fade slope for terrestrial links

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