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All Journal International Journal of Electrical and Computer Engineering Indonesian Journal of Electrical Engineering and Computer Science
Md Moktarul Alam
International Islamic University Malaysia
Computer Science & IT Electrical & Electronics Engineering

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Analysis of Time Diversity Gain for Satellite Communication Link based on Ku-Band Rain Attenuation Data Measured in Malaysia Islam Md. Rafiqul; Ali Kadhim Lwas; Mohamed Hadi Habaebi; Md Moktarul Alam; Jalel Chebil; Jit Singh Mandeep; Alhareth Zyoud
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 4: August 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (693.029 KB) | DOI: 10.11591/ijece.v8i4.pp2608-2613

Abstract

This paper reports a study on mitigation of propagation impairments on Earth–space communication links. The study uses time diversity as a technique for mitigating rain propagation impairment in order to rectify rain fade. Rain attenuation time series along earth-to-satellite link were measured for two years period at 12.255 GHz in Malaysia. The time diversity technique was applied on measured rain fade to investigate the level of possible improvement in system. Time diversity gain from measured one-minute rain attenuation for two years period was estimated and significant improvement was observed with different delays of time. These findings will be utilized as a useful tool for link designers to apply time diversity as a rain fade mitigation technique in Earth-satellite communications systems.
Rain Rate Distributions for Microwave Link Design Based on Long Term Measurement in Malaysia Islam Md Rafiqul; Md Moktarul Alam; Ali Kodhim Lwas; Sarah Yasmin Mohamad
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 3: June 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v10.i3.pp1023-1029

Abstract

Attenuation due to rain is an important constraint in microwave radio link design especially at frequencies above 10 GHz. It restricts the path length of radio communication systems and limits the use of higher frequencies for line-of-sight microwave links and satellite communications. In order to predict the attenuation due to rain accurately rainfall intensity is required with 1-minute integration time. Rainfall is a meteorological phenomenon with complex structure due to its variability in space, duration and occurrence frequency, particularly in tropical and equatorial regions. Since, the statistical distribution of rain attenuation is obtained from the rain rate distribution for the region considered, it should be noted that the accuracy of the rain rate measurement affects the accuracy of the attenuation estimation. This paper presents rain intensity with 1-minute integration time measured for 6 years in Malaysia, it’s distribution, comparison with other prediction models and impact on high frequency microwave links.
Co-Authors Alhareth Zyoud Ali Kadhim Lwas Ali Kodhim Lwas Islam Md Rafiqul Islam Md. Rafiqul Jalel Chebil Jit Singh Mandeep Mohamed Hadi Habaebi Sarah Yasmin Mohamad