Rain Fade Mitigation Technique Using Residue Number System Architecture on KU Band Satellite Communication Link
Stephen Akobre,
Mohammed Ibrahim Daabo,
Abdul-Mumin Salifu
Issue:
Volume 8, Issue 1, June 2020
Pages:
1-8
Received:
26 August 2020
Accepted:
13 October 2020
Published:
20 October 2020
Abstract: Rain fade is the loss of signal power at the receiver of a telecommunication system mainly due to absorption and scattering caused by rain in the transmission medium, especially at frequencies above 10 GHz. In order to combat the loss of the signal power at the receiver, there is the need to employ rain fade mitigation techniques. Consequently, researchers have been studying how rain affects the signal in different geographical locations as well as proposing some mitigation techniques. Power control is one of the mitigation techniques that have been proposed. But this technique has some associated challenges. Increasing the power will lead to an increase in cost of transmission which will eventually be passed on to the consumer thereby making satellite services expensive. It introduces a delay in compensation due to link estimation and coordination. Also, because of health concerns there is a limit to the amount of power that can be radiated to the ground and this is governed by international agreements. Another power management drawback in using this technique is that, it is essential to track the power continuously to ensure that the power values are not set too high, which can lead to the front end of the receiver being overdriven and eventually leading to a shutdown or physical damage. In this paper, we address the power control challenges, by leveraging on the inherent properties of Residue Number System (RNS) to propose an RNS architecture using the moduli set {22n+1-1, 22n -1, 22n} that can mitigate rain fade in the satellite link. In digital communication systems, the bit energy, eb, is the most important parameter in determining the communications link performance. Numerical analysis shows that the proposed scheme performs better than the traditional method as indicated in the high energy per bit value obtained in the proposed system in comparison with the traditional method.
Abstract: Rain fade is the loss of signal power at the receiver of a telecommunication system mainly due to absorption and scattering caused by rain in the transmission medium, especially at frequencies above 10 GHz. In order to combat the loss of the signal power at the receiver, there is the need to employ rain fade mitigation techniques. Consequently, res...
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Evaluation of Spatial Distribution of Secondary Schools in Hebron City / Southern West Bank
Issue:
Volume 8, Issue 1, June 2020
Pages:
9-15
Received:
28 September 2019
Accepted:
21 February 2020
Published:
30 October 2020
Abstract: This research dealt with the study and evaluation of the reality of secondary schools in the city of Hebron, and compared with the planning standards, and this is one of the important foundations through which to draw the current picture of the reality of these schools, to form a basis on which to support the current and future planning proposals necessary for the development of the reality of those Therefore, this research relied on the quantitative analytical approach as the most appropriate method for expressing statistical analyzes, as well as using it in conducting some of the analyzes available in the GIS program. Therefore, the research has come up with a set of results, including the results of statistical analysis that indicate that the characteristics of the majority of the secondary teacher was incompatible with their planning standards, due to the prevalence of random pattern in the signing of these schools, as well as not to rely on the foundations and planning criteria for the distribution of uses shown And pitches in them.
Abstract: This research dealt with the study and evaluation of the reality of secondary schools in the city of Hebron, and compared with the planning standards, and this is one of the important foundations through which to draw the current picture of the reality of these schools, to form a basis on which to support the current and future planning proposals n...
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