Satellite signals for communication and navigation experience impairment effects due to ionospher... more Satellite signals for communication and navigation experience impairment effects due to ionosphere especially in the equatorial region. The causes and significance of ionosphere disturbances are a kind of research that is of great interest in this area. Space-based radio communication systems such as the Global Positioning System (GPS) is providing a unique chance to explore the impact of the ionosphere as the signals propagate from the satellites to the GPS receivers. Sarawak which is located near to the equatorial region has been selected for the aim of this research. By utilizing the Total Electron Content (TEC), data recorded by the GPS Ionospheric Scintillation & TEC Monitor (GISTM), the ionospheric effect was examined and related to the signal strength performance. The recorded TEC were tested by comparing to TEC obtained from CODE Global Ionosphere Maps (GIMs) in time series. The results have shown a high consistency of TEC in the time domain with their corresponding minimum ...
Mobile Satellite (MS) signal undergoes attenuation and distortion due to ionospheric, multipath f... more Mobile Satellite (MS) signal undergoes attenuation and distortion due to ionospheric, multipath fading and shadowing effects in the transmission path causing irregularities in the received signal quality. Although many studies have been carried out to improve the performance of the mobile satellite (MS) system, there are yet many areas of the less developed and developing countries where satellite data are not available. Furthermore, expensive data acquisition method prevents more studies to be carried out in these countries. In this study, a more economical alternative design for MS data monitoring and mining for the satellites transmitting at L-band was designed, constructed, and implemented by utilizing the Global Positioning System (GPS) data. The research objectives covers the development of data acquisition system for efficient L-band GPS satellite signal analysis, the formulation algorithms for L-band GPS Satellite signal massages as well as the proposed NMEA data extractor f...
This study has designed a data acquisition system comprising of antenna gain enhancement module a... more This study has designed a data acquisition system comprising of antenna gain enhancement module and self-package adaptive graphical user interface (SPAGUI) to manage the open space satellite propagation data and evaluate the signal-to-noise ratio (SNR) being a function of azimuth and elevation angles. However, the sentences parameters have been assessed and analyzed the signal performance in term of Signal to Noise Ratio (SNR), azimuth angles and satellite elevation angles. The analysis produced forms an important part of the studies of the signal performance for these regions. From this research work, MS received signals for Kano was characterized and the investigation gave direction to communication provider so that can improve the quality services to the users in the environment.
Journal of Advanced Industrial Technology and Application, 2021
Lack of equipment to study mobile satellites signal propagation in colleges and universities pron... more Lack of equipment to study mobile satellites signal propagation in colleges and universities prone this research work. A Handheld GPS receiver used as a tool for training college students to learn mobile satellite signal propagation using Global Positioning System (GPS) approach. These refer to the experimental setup of the equipment that is the connection done between the GPS receiver with a computer. The satellite propagation data received from the GPS machine can be recorded continuously with an updates rate of 2 seconds. The experiment was carried out in an open space environment at predetermine locations using simple setup, where a cheap, readily and available portable GPS receiver were connected to the computer to acquire propagation data. The computer was equipped with a self-developed package graphical user interface (GUI) monitoring the propagation information from the GPS satellites and saving the data. The developed system can be set up anywhere at any location. The sate-...
There is need for experimental data in the less developed and developing countries such as Africa... more There is need for experimental data in the less developed and developing countries such as Africa, Asia and Latin America for the study and analysis of mobile satellite signal performance for communication purposes. The experiments were carried out in open space area with no obstruction of the direct wave. Comparisons were made between the soft reformatted data obtained in Kano, Kota Samarahan in Sarawak and Fukuoka in Japan. Data acquisition system developments were designed to manage the open space environment satellite propagation data for the less develop regions, whereby adaptive graphical user interface (AGUI) was designed and developed to records the propagations data. Therefore the recorded data will be used to evaluate the signal performance in term of SNR, azimuth angles and satellite elevation angles. Results obtained from analysis will be used to determine the characteristics of the open space environment. This method can be used to encourage more experimental works in t...
International Journal of Engineering Research in Africa, 2015
GPS receivers play an important role for calculating and determining the precise point positionin... more GPS receivers play an important role for calculating and determining the precise point positioning and deal with the navigational messages. Also, one of the main uses of high-end GPS receivers is for scientific research and space science analysis. The handheld GPS receivers were utilized for experimental purposes contrary to the traditional application for recreation and geo-catching activities. The classification of different commercial GPS receivers gave an inside idea for application and utilization of these receivers in the field of laboratory research. Garmin GPS handheld receivers performed an excellent example in conducting experimental work for GPS propagation data analysis.
International Conference on Computer and Communication Engineering (ICCCE'10), 2010
Signal degradation in Mobile Satellite (MS) is due to several factors such as ionospheric effect,... more Signal degradation in Mobile Satellite (MS) is due to several factors such as ionospheric effect, multipath fading, treeshadowed and building-shadowed. This affects the Mobile Satellite Service (MSS) to provide continuous communication service to the users. Since there is not adequate data available on the signal performance of the MS in the Asian continent, thus, an experimental work is essential to be carried out to investigate the effect of factors such as the tree-shadowed and buildingshadowed on the signal strength. This paper discusses the cost effective set up. It can be used to measure the effect of trees and buildings on the received mobile satellite signal operating in the L-band. The methodology uses to carry up the experimental works is discussed in detail. The measurements of the signal performance are performed under different MS environments such as tree-shadowed and building-shadowed and hence the results are compared to the data obtained for open space environment. The analysis of the signal performance under different MS environments is performed with respect to the elevation and azimuth degree at different time under a clear sky condition. The analysis produced forms an important part in the studies of the signal performance. From this research work, we would like to propose a simple and low cost data acquisition system in order to encourage more experimental works to be carried out especially in the less developed countries.
Proceeding of the 2011 IEEE International Conference on Space Science and Communication (IconSpace), 2011
Mobile satellites (MS) propagation is important for the study of satellites signal strength. This... more Mobile satellites (MS) propagation is important for the study of satellites signal strength. This paper concentrates on the evaluation of best positioning for the experimental data acquisition system, where a portable commercial Global Positioning System receiver was used in getting the best position. The receiver azimuth angle and elevation angle were utilized in obtaining the best results. The experiment is carried out in an open space area where line-of sight will be visible. Measurement is then performed to determine the relationship between the signal performance with respect to the elevation and azimuth angles. The result obtained from this experiment will be used to set a standard and best positioning for the GPS receiver in collecting data for experimental purpose. Single frequency receivers have the advantage that they are low-cost and CA-code acquisition for civilian access provide higher signal to noise ratio than synthesized P-code acquisition. Since the civilian users can have only access of CA-code, while the P-code in mainly for military users, this kind of receiver was used in this research. Details methodology for doing the experimental works will be discussed. The experiment was conducted at roof top of faculty of engineering building, Universiti Malaysia Sarawak. Therefore, a handheld GPS receiver best positioning experiment designed in order to encourage more experimental works to be carried out in the less developed countries. The analysis of the signal performance under different MS environments is performed with respect to the information such as elevation and azimuth angles.
International Conference on Space Science and Communication, 2011
Mobile satellites (MS) propagation is important for the study of satellites signal strength. This... more Mobile satellites (MS) propagation is important for the study of satellites signal strength. This paper concentrates on the evaluation of best positioning for the experimental data acquisition system, where a portable commercial Global Positioning System receiver was used in getting the best position. The receiver azimuth angle and elevation angle were utilized in obtaining the best results. The experiment is
International Conference on Computer and Communication Engineering (ICCCE'10), 2010
Signal degradation in Mobile Satellite (MS) is due to several factors such as ionospheric effect,... more Signal degradation in Mobile Satellite (MS) is due to several factors such as ionospheric effect, multipath fading, tree-shadowed and building-shadowed. This affects the Mobile Satellite Service (MSS) to provide continuous communication service to the users. Since there is not adequate data available on the signal performance of the MS in the Asian continent, thus, an experimental work is essential to be carried out to investigate the effect of factors such as the tree-shadowed and building-shadowed on the signal strength. This paper discusses the cost effective set up. It can be used to measure the effect of trees and buildings on the received mobile satellite signal operating in the L-band. The methodology uses to carry up the experimental works is discussed in detail. The measurements of the signal performance are performed under different MS environments such as tree-shadowed and building-shadowed and hence the results are compared to the data obtained for open space environment...
International Conference on Computer and Communication Engineering (ICCCE'10), 2010
Mobile satellite (MS) signal performance is affected by many factors such as ionospheric effect, ... more Mobile satellite (MS) signal performance is affected by many factors such as ionospheric effect, multipath fading and shadowing effect. Satellites transmit signals at the same strength, but things like trees and buildings can obscure a signal beyond recognition. Some experimental works have been done using the existing geo-satellite system or airborne platform in the developed countries which is quite expensive and complicated. Very little data is represents less developed countries such as Africa and Asia. Therefore, a simple and low cost data acquisition system that can be used to carry out measurement of the MS signal performance is proposed. The experiment is carried out in open area with no obstruction of the direct wave. In addition, NMEA sentences will be used to obtain the required signal propagation parameters. The measurement is then performed to determine the relationship between the signal performance with respect to the elevation and azimuth angles. Results obtained fro...
Satellite signals for communication and navigation experience impairment effects due to ionospher... more Satellite signals for communication and navigation experience impairment effects due to ionosphere especially in the equatorial region. The causes and significance of ionosphere disturbances are a kind of research that is of great interest in this area. Space-based radio communication systems such as the Global Positioning System (GPS) is providing a unique chance to explore the impact of the ionosphere as the signals propagate from the satellites to the GPS receivers. Sarawak which is located near to the equatorial region has been selected for the aim of this research. By utilizing the Total Electron Content (TEC), data recorded by the GPS Ionospheric Scintillation & TEC Monitor (GISTM), the ionospheric effect was examined and related to the signal strength performance. The recorded TEC were tested by comparing to TEC obtained from CODE Global Ionosphere Maps (GIMs) in time series. The results have shown a high consistency of TEC in the time domain with their corresponding minimum ...
Mobile Satellite (MS) signal undergoes attenuation and distortion due to ionospheric, multipath f... more Mobile Satellite (MS) signal undergoes attenuation and distortion due to ionospheric, multipath fading and shadowing effects in the transmission path causing irregularities in the received signal quality. Although many studies have been carried out to improve the performance of the mobile satellite (MS) system, there are yet many areas of the less developed and developing countries where satellite data are not available. Furthermore, expensive data acquisition method prevents more studies to be carried out in these countries. In this study, a more economical alternative design for MS data monitoring and mining for the satellites transmitting at L-band was designed, constructed, and implemented by utilizing the Global Positioning System (GPS) data. The research objectives covers the development of data acquisition system for efficient L-band GPS satellite signal analysis, the formulation algorithms for L-band GPS Satellite signal massages as well as the proposed NMEA data extractor f...
This study has designed a data acquisition system comprising of antenna gain enhancement module a... more This study has designed a data acquisition system comprising of antenna gain enhancement module and self-package adaptive graphical user interface (SPAGUI) to manage the open space satellite propagation data and evaluate the signal-to-noise ratio (SNR) being a function of azimuth and elevation angles. However, the sentences parameters have been assessed and analyzed the signal performance in term of Signal to Noise Ratio (SNR), azimuth angles and satellite elevation angles. The analysis produced forms an important part of the studies of the signal performance for these regions. From this research work, MS received signals for Kano was characterized and the investigation gave direction to communication provider so that can improve the quality services to the users in the environment.
Journal of Advanced Industrial Technology and Application, 2021
Lack of equipment to study mobile satellites signal propagation in colleges and universities pron... more Lack of equipment to study mobile satellites signal propagation in colleges and universities prone this research work. A Handheld GPS receiver used as a tool for training college students to learn mobile satellite signal propagation using Global Positioning System (GPS) approach. These refer to the experimental setup of the equipment that is the connection done between the GPS receiver with a computer. The satellite propagation data received from the GPS machine can be recorded continuously with an updates rate of 2 seconds. The experiment was carried out in an open space environment at predetermine locations using simple setup, where a cheap, readily and available portable GPS receiver were connected to the computer to acquire propagation data. The computer was equipped with a self-developed package graphical user interface (GUI) monitoring the propagation information from the GPS satellites and saving the data. The developed system can be set up anywhere at any location. The sate-...
There is need for experimental data in the less developed and developing countries such as Africa... more There is need for experimental data in the less developed and developing countries such as Africa, Asia and Latin America for the study and analysis of mobile satellite signal performance for communication purposes. The experiments were carried out in open space area with no obstruction of the direct wave. Comparisons were made between the soft reformatted data obtained in Kano, Kota Samarahan in Sarawak and Fukuoka in Japan. Data acquisition system developments were designed to manage the open space environment satellite propagation data for the less develop regions, whereby adaptive graphical user interface (AGUI) was designed and developed to records the propagations data. Therefore the recorded data will be used to evaluate the signal performance in term of SNR, azimuth angles and satellite elevation angles. Results obtained from analysis will be used to determine the characteristics of the open space environment. This method can be used to encourage more experimental works in t...
International Journal of Engineering Research in Africa, 2015
GPS receivers play an important role for calculating and determining the precise point positionin... more GPS receivers play an important role for calculating and determining the precise point positioning and deal with the navigational messages. Also, one of the main uses of high-end GPS receivers is for scientific research and space science analysis. The handheld GPS receivers were utilized for experimental purposes contrary to the traditional application for recreation and geo-catching activities. The classification of different commercial GPS receivers gave an inside idea for application and utilization of these receivers in the field of laboratory research. Garmin GPS handheld receivers performed an excellent example in conducting experimental work for GPS propagation data analysis.
International Conference on Computer and Communication Engineering (ICCCE'10), 2010
Signal degradation in Mobile Satellite (MS) is due to several factors such as ionospheric effect,... more Signal degradation in Mobile Satellite (MS) is due to several factors such as ionospheric effect, multipath fading, treeshadowed and building-shadowed. This affects the Mobile Satellite Service (MSS) to provide continuous communication service to the users. Since there is not adequate data available on the signal performance of the MS in the Asian continent, thus, an experimental work is essential to be carried out to investigate the effect of factors such as the tree-shadowed and buildingshadowed on the signal strength. This paper discusses the cost effective set up. It can be used to measure the effect of trees and buildings on the received mobile satellite signal operating in the L-band. The methodology uses to carry up the experimental works is discussed in detail. The measurements of the signal performance are performed under different MS environments such as tree-shadowed and building-shadowed and hence the results are compared to the data obtained for open space environment. The analysis of the signal performance under different MS environments is performed with respect to the elevation and azimuth degree at different time under a clear sky condition. The analysis produced forms an important part in the studies of the signal performance. From this research work, we would like to propose a simple and low cost data acquisition system in order to encourage more experimental works to be carried out especially in the less developed countries.
Proceeding of the 2011 IEEE International Conference on Space Science and Communication (IconSpace), 2011
Mobile satellites (MS) propagation is important for the study of satellites signal strength. This... more Mobile satellites (MS) propagation is important for the study of satellites signal strength. This paper concentrates on the evaluation of best positioning for the experimental data acquisition system, where a portable commercial Global Positioning System receiver was used in getting the best position. The receiver azimuth angle and elevation angle were utilized in obtaining the best results. The experiment is carried out in an open space area where line-of sight will be visible. Measurement is then performed to determine the relationship between the signal performance with respect to the elevation and azimuth angles. The result obtained from this experiment will be used to set a standard and best positioning for the GPS receiver in collecting data for experimental purpose. Single frequency receivers have the advantage that they are low-cost and CA-code acquisition for civilian access provide higher signal to noise ratio than synthesized P-code acquisition. Since the civilian users can have only access of CA-code, while the P-code in mainly for military users, this kind of receiver was used in this research. Details methodology for doing the experimental works will be discussed. The experiment was conducted at roof top of faculty of engineering building, Universiti Malaysia Sarawak. Therefore, a handheld GPS receiver best positioning experiment designed in order to encourage more experimental works to be carried out in the less developed countries. The analysis of the signal performance under different MS environments is performed with respect to the information such as elevation and azimuth angles.
International Conference on Space Science and Communication, 2011
Mobile satellites (MS) propagation is important for the study of satellites signal strength. This... more Mobile satellites (MS) propagation is important for the study of satellites signal strength. This paper concentrates on the evaluation of best positioning for the experimental data acquisition system, where a portable commercial Global Positioning System receiver was used in getting the best position. The receiver azimuth angle and elevation angle were utilized in obtaining the best results. The experiment is
International Conference on Computer and Communication Engineering (ICCCE'10), 2010
Signal degradation in Mobile Satellite (MS) is due to several factors such as ionospheric effect,... more Signal degradation in Mobile Satellite (MS) is due to several factors such as ionospheric effect, multipath fading, tree-shadowed and building-shadowed. This affects the Mobile Satellite Service (MSS) to provide continuous communication service to the users. Since there is not adequate data available on the signal performance of the MS in the Asian continent, thus, an experimental work is essential to be carried out to investigate the effect of factors such as the tree-shadowed and building-shadowed on the signal strength. This paper discusses the cost effective set up. It can be used to measure the effect of trees and buildings on the received mobile satellite signal operating in the L-band. The methodology uses to carry up the experimental works is discussed in detail. The measurements of the signal performance are performed under different MS environments such as tree-shadowed and building-shadowed and hence the results are compared to the data obtained for open space environment...
International Conference on Computer and Communication Engineering (ICCCE'10), 2010
Mobile satellite (MS) signal performance is affected by many factors such as ionospheric effect, ... more Mobile satellite (MS) signal performance is affected by many factors such as ionospheric effect, multipath fading and shadowing effect. Satellites transmit signals at the same strength, but things like trees and buildings can obscure a signal beyond recognition. Some experimental works have been done using the existing geo-satellite system or airborne platform in the developed countries which is quite expensive and complicated. Very little data is represents less developed countries such as Africa and Asia. Therefore, a simple and low cost data acquisition system that can be used to carry out measurement of the MS signal performance is proposed. The experiment is carried out in open area with no obstruction of the direct wave. In addition, NMEA sentences will be used to obtain the required signal propagation parameters. The measurement is then performed to determine the relationship between the signal performance with respect to the elevation and azimuth angles. Results obtained fro...
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Papers by Ibrahim Abba