Fade Margins Prediction for Broadband Fixed Wireless Access (Bfwa) From Measurements in Tropics

Islam, Md. Rafiqul; Rahman, Tharek Abdul; Rahim, S. K. A.; Al-tabatabaie, Kusay Faisal; Abdulrahman, A. Y.

doi:10.2528/pierc09103006

Cited by 8 publications

(3 citation statements)

References 12 publications

(12 reference statements)

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“…Moreover, the proposed model can be applied to the prediction of the performance of satellite fade mitigation techniques, such as Time diversity [20], or adaptive coding and modulation and power control. Also, with the extension of the model to multidimensional case [21], the proposed model can be used for interference analysis evaluation [22] and for the prediction of the fade margins for broadband wireless access networks [23]. Finally, the dynamic diversity gain is evaluated for a pico-scale site diversity system.…”

Section: Resultsmentioning

confidence: 99%

Dynamic Properties of Rain Attenuation in Athens, Greece: Slant Path Rain Attenuation Synthesizer and Dynamic Diversity Gain

Kourogiorgas¹,

Panagopoulos²,

Livieratos³

et al. 2015

PIER M

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In this paper, the dynamics of rain attenuation are examined, and dynamic diversity gain is evaluated for a pico-scale site diversity system. Since modern satellite communication systems operate at frequencies above 10 GHz, their efficient design requires the adoption of Propagation Impairment Mitigation techniques and so rain attenuation time series synthesizers. For rain attenuation, which is the most dominant fading mechanism, the dynamic stochastic model, proposed by Maseng-Bakken, based on the lognormal distribution is the most widely accepted and used. In this latter model, the dynamic parameter is required for the generation of slant path rain attenuation time series. In this paper, firstly, a simple expression is proposed for the calculation of the dynamic parameter in terms of the mean wind speed, elevation angle of the link, and dynamic parameter of rainfall rate. The new theoretical expression is tested with simulated data with very encouraging results. This expression is then used into a unified rain attenuation synthesizer with inputs from the rainfall rate statistics and the satellite slant path characteristics. Finally, the dynamic diversity gain is calculated for pico-scale site diversity systems for various link characteristics.

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Section: Resultsmentioning

confidence: 99%

Dynamic Properties of Rain Attenuation in Athens, Greece: Slant Path Rain Attenuation Synthesizer and Dynamic Diversity Gain

Kourogiorgas¹,

Panagopoulos²,

Livieratos³

et al. 2015

PIER M

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“…Tese values indicate that the designed link is highly reliable, ensuring the establishment of a quality service. Te percentage availability and fade margin provide assurance of the link's quality and reliability, guaranteeing interferencefree communication [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Discussionmentioning

confidence: 99%

Enhancing Communication Reliability: Designing Microwave Links for Bahir Dar-Woretta Connectivity

Mihretu Adega

2024

Advances in Materials Science and Engineering

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This paper explores the need for establishing a microwave link between Bahir Dar and Woretta as an alternative communication solution to the existing optical fiber infrastructure. Microwave links offer an effective way to overcome challenges posed by rugged terrains and unfavorable environmental conditions that hinder the deployment of fiber optics. As Woretta emerges as a key economic and investment hub within the Amhara Region, demand for reliable and efficient communication is expected to grow significantly. The study encompasses various aspects of planning and designing the microwave link, including site surveys, consideration of fade margins, frequency planning, link budget calculations, and assessing the feasibility and reliability of the proposed link. The paper employs LINKPlanner 5.4.1 software to simulate and validate the results. Due to terrain constraints, a direct link between Bahir Dar and Woretta is not feasible. Instead, a two-hop link is proposed, involving transmission from Bahir Dar to Zege, and then from Zege to Woretta. This alternative configuration ensures optimal connectivity while addressing the terrain limitations. By presenting a comprehensive analysis and simulation of the microwave link, this paper provides valuable insights into the planning and implementation of a robust communication infrastructure. The proposed microwave link will offer a reliable and efficient alternative to the existing optical fiber network, ensuring uninterrupted connectivity to support the region’s growth and development.

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“…To measure the effects of rain attenuation on the direct broadcasting satellite (DBS) downlink signals as well as the impact of the potential interference on the reception quality is one of the fundamental constraints (Tsolakis and Stutzman 1982;Crane 1996;Lin and Chen 2002;Mandeep 2007;Mandeep and Allnutt 2007;Panagopoulos and Chatzarakis 2007;Bahrami and Rashed-Mohassel 2008;Ojo, Ajewole, and Sarkar 2008;Ojo and Joseph-Ojo 2008;Panagopoulos 2008;Shamsan, Al-Hetar, and Rahman 2008;Serdyuk 2008;Zhu, Li, and Lou 2008;Mandeep 2009;Setijadi, Matsushima, Tanaka, and Hendrantoro 2009;Rafi Ul Islam, Rahman, Rahim, Al-tabatabaie, and Abdulrahman 2009). The electromagnetic waves, whose frequencies are above 10 GHz while propagating over a long distance, always suffer from propagation impairments that make the signal totally degraded and weak (Samuel 1993).…”

Section: Introductionmentioning

confidence: 99%

Potential interference and rain attenuation at 21.4–22 GHz downlink broadcasting satellite signals

Hasan

Rahim

Shamsan

et al. 2011

International Journal of Electronics

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World Radio Conference WRC-1992 has allocated the frequency band 21.4-22.0 GHz to regions 1 and 3 to be utilised to carry direct broadcasting satellite (DBS) services. This high-frequency band is more susceptible to rain attenuation, leading to degradation of the signal quality. Moreover, this frequency band is assigned to two different services, i.e. satellite broadcasting and fixed mobile services at the same regions; hence, the impact of intersystem interference in a depredated signal is a critical issue in the DBS receiver. In this study, the effects of rain attenuation on the DBS downlink signals as well as the impact of the potential interference on the reception quality will be estimated. An interference scenario will be introduced to investigate the system performance in both propagation mechanisms of clear-sky and rain conditions.

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Fade Margins Prediction for Broadband Fixed Wireless Access (Bfwa) From Measurements in Tropics

Cited by 8 publications

References 12 publications

Dynamic Properties of Rain Attenuation in Athens, Greece: Slant Path Rain Attenuation Synthesizer and Dynamic Diversity Gain

Dynamic Properties of Rain Attenuation in Athens, Greece: Slant Path Rain Attenuation Synthesizer and Dynamic Diversity Gain

Enhancing Communication Reliability: Designing Microwave Links for Bahir Dar-Woretta Connectivity

Potential interference and rain attenuation at 21.4–22 GHz downlink broadcasting satellite signals

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