Rain fade analysis on earth to-satellite link operating in Comoros /
Microwave link operates at high frequency approximately 10 GHz and above, and it suffers from high attenuation in the tropical region due to high rain intensity. Therefore, a microwave designer should consider this effect in the design so that the link can be operated with good quality of service, h...
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| 主要作者: | |
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| 格式: | Thesis 圖書 |
| 語言: | English |
| 出版: |
Kuala Lumpur :
Kulliyyah of Engineering, International Islamic University Malaysia,
2020
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| 主題: | |
| 在線閱讀: | http://studentrepo.iium.edu.my/handle/123456789/11296 |
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| 總結: | Microwave link operates at high frequency approximately 10 GHz and above, and it suffers from high attenuation in the tropical region due to high rain intensity. Therefore, a microwave designer should consider this effect in the design so that the link can be operated with good quality of service, high availability and reliability. This study is about analysis of rain fade in a tropical country, Comoros, where the rain intensity was considered from ITU-R Recommendation. This rain intensity was used to determine the rain fade for earth-to-satellite of links operating in this country at L, C, Ka, Ku and V bands in horizontal, vertical and circular polarization for 0.001% to 1% of exceeded per year.Methods used for this study are the procedure of prediction attenuation (ITU-R P.618) and modulation techniques.From the analysis, it was found that the link has availability to work from 99.999% to 99% with least effects in all frequency bands at vertical polarization, except in V-band. At 99% of availability, it shows that B-PSK is the best technique for modulation to make the proposed link more reliable. To attain 10dB fade margin which allows the antenna to reach certain quality of services, the gain receiver, diameter and figure of merit were increased while the footprint was maximized. The outcome of this study will be useful resources used to upgrade the availability and reliability of earth to satellite microwave link in Comoros.
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| Item Description: | Abstracts in English and Arabic.
"A dissertation submitted in fulfilment of the requirement for the degree of Master of Science (Communication Engineering)." --On title page. |
| 實物描述: | xix, 88 leaves : color illustrations ; 30 cm. |
| 參考書目: | Includes bibliographical references (leaves 71-73). |