Study of Attenuation in Vegetation Media and Prediction Model at Microwave Frequencies
Mahmoud Elshayeb,
Silvello Betti
Issue:
Volume 7, Issue 1, March 2018
Pages:
1-7
Received:
7 November 2017
Accepted:
5 December 2017
Published:
5 January 2018
Abstract: This paper presents the First report of an ongoing to study the effects of trees on radio signals at microwave frequencies. The effects of vegetation media on the planning and design of radio links at microwave and Microwave frequencies are considerable and must be accounted for by radio system operators and users. Measurements have been made to determine the extent of attenuation when propagated through vegetation and also have been carried to be conducted on selected vegetation with various degree of foliation to determine the dependence of losses on vegetation. Also, path geometry and tree geometry are among other parameters under consideration. The results from these experiments compared with standard ITUR-P empirical models and to reflect the dependence of vegetation attenuation on the input parameters under observation.
Abstract: This paper presents the First report of an ongoing to study the effects of trees on radio signals at microwave frequencies. The effects of vegetation media on the planning and design of radio links at microwave and Microwave frequencies are considerable and must be accounted for by radio system operators and users. Measurements have been made to de...
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Enterprise-Strength Internet Connectivity in the Orkney Islands
Issue:
Volume 7, Issue 1, March 2018
Pages:
8-19
Received:
27 November 2017
Accepted:
6 December 2017
Published:
11 January 2018
Abstract: The Internet has remained one of the most remarkable invention of the 21st century as it has redefined the concept of globalization and turned the world into a global village where geographical and developmental limitations experienced few decades ago no longer find relevance. To this end it is possible to create solutions that could enable geographically disadvantaged locations and communities in relation to communication; to be united to their contemporaries in urban areas through information and communication networks especially the Internet. This study seeks to provide a feasible solution to the challenges of Internet access within the Orkney Islands of Kirkwall and North Ronaldsay having regard to such potential factors as: users in the surrounding communities having access to effective online business transactions, geographical terrain and location of the islands, future community development and the reliability of the communication infrastructure. To achieve its objectives this study considers available technologies and communication infrastructure that can be harnessed to attain a high speed and reliable internet connection across places located in the Orkney Islands.
Abstract: The Internet has remained one of the most remarkable invention of the 21st century as it has redefined the concept of globalization and turned the world into a global village where geographical and developmental limitations experienced few decades ago no longer find relevance. To this end it is possible to create solutions that could enable geograp...
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Path-Loss Estimation for Wireless Cellular Networks Using Okumura/Hata Model
Issue:
Volume 7, Issue 1, March 2018
Pages:
20-27
Received:
30 November 2017
Accepted:
9 December 2017
Published:
11 January 2018
Abstract: In cellular networks, accurate path-loss estimation is highly desirable not only to improve the performance but also to realize precise estimation of financial feasibility. In other words, while accurate path-loss estimation helps to achieve an acceptable performance and reasonable cost, inaccurate path-loss estimation would either lead to degrade the performance, or increase the cost. Different models were introduced in the literature for achieving accurate path-loss estimation. One of theses models is the Okumura/Hata model which is recommended for being used to estimate the path-loss in the cellular systems that employing micro-cells. It is characterized by its suitability for being used in a variety of environments. The main objective in this paper is to provide a guide line for path-loss estimation analysis using Okumura/Hata model. Matlab software was used to perform this analysis. Compared with free space model in which frequency and separation distance are the only contributors for path-loss, more accurate estimation can be achieved when Okumura/Hata model is used as it includes further correction factors, such as mobile station antenna height and base station antenna height.
Abstract: In cellular networks, accurate path-loss estimation is highly desirable not only to improve the performance but also to realize precise estimation of financial feasibility. In other words, while accurate path-loss estimation helps to achieve an acceptable performance and reasonable cost, inaccurate path-loss estimation would either lead to degrade ...
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Development of a Heartbeat and Temperature Measuring System for Remote Health Nursing for the Aged in Developing Country
Blessed Olalekan Oyebola,
Ogunlewe Adeyinka Oluremi,
Toluwani Victor Odueso
Issue:
Volume 7, Issue 1, March 2018
Pages:
34-42
Received:
4 December 2017
Accepted:
13 December 2017
Published:
11 January 2018
Abstract: Obtainable remote nursing systems have some identified glitches including inept data extraction and dynamic tuning of data to preserve the quality of data transmission exclusively for the aged. This paper presents an alternative designed architecture of a microcontroller based heartbeat and body temperature monitoring system using fingertip and temperature sensor as a solution to some of the identified challenges of existing technology that uses network between the patient and doctor to enable remote monitoring of aged patient for medical attention. Appraisal of the device on real signals shows accuracy in heartbeat measurement, even under intense physical activity for the aged.
Abstract: Obtainable remote nursing systems have some identified glitches including inept data extraction and dynamic tuning of data to preserve the quality of data transmission exclusively for the aged. This paper presents an alternative designed architecture of a microcontroller based heartbeat and body temperature monitoring system using fingertip and tem...
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