Monthly and diurnal variability of rain rate and rain attenuation during the monsoon period in Malaysia

Ulaganathen, Kesavan and Islam, Md. Rafiqul and Tharek, A.R. and ASSI, Mauro S. (2014) Monthly and diurnal variability of rain rate and rain attenuation during the monsoon period in Malaysia. Radioengineering, 23 (2). pp. 754-757. ISSN 1210-2512 (P) 1805-9600 (O)

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Abstract

Rain is the major source of attenuation for microwave propagation above 10 GHz. In tropical and equatorial regions where the rain intensity is higher, designing a terrestrial and earth-to-satellite microwave links is very critical and challenging at these frequencies. This paper presents the preliminary results of rain effects in a 23 GHz terrestrial point-to-point communication link 1.3 km long. The experimental test bed had been set up at Skudai, Johor Bahru, Malaysia. In this area, a monsoon equatorial climate prevails and the rainfall rate can reach values well above 100 mm/h with significant monthly and diurnal variability. Hence, it is necessary to implement a mitigation technique for maintaining an adequate radio link performance for the action of very heavy rain. Since we now know that the ULPC (Up Link Power Control) cannot guarantee the desired performance, a solution based on frequency band diversity is proposed in this paper. Here, a secondary radio link operating in a frequency not affected by rain (C band for instance) is placed parallel with the main link. Under no rain or light rain conditions, the secondary link carries without priority radio signals. When there is an outage of the main link due to rain, the secondary link assumes the priority traffic. The outcome of the research shows a solution for higher operating frequencies during rainy events.

Item Type:	Article (Journal)
Additional Information:	3802/39092
Uncontrolled Keywords:	Rainfall rate, rain distribution, rain attenuation, diurnal variability, monthly variability, power control, frequency diversity, radio link, system availability.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Dr. Md. Rafiqul Islam
Date Deposited:	13 Nov 2014 08:58
Last Modified:	25 Sep 2017 18:33
URI:	http://irep.iium.edu.my/id/eprint/39092

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