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Timothy, Zhimwang Jangfa
- Evaluation of Signal Strength and Quality of a Ku-Band Satellite Downlink during Raining Season in Guinea Savanna Region of Nigeria
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Authors
Yahaya Yunisa
1,
Zhimwang Jangfa Timothy
2,
Ogherohwo Enoh Pius
,
Ibrahim Aminu
,
Shaka Oghenemega Samuel
,
Frank, Lagbegha-ebi Mercy
Affiliations
1 Department of Electrical/Electronics Technology, Kogi State College of Education (Technical) Kabba,Kogi State, NG
2 Department of Physics, Federal University Lokoja, NG
1 Department of Electrical/Electronics Technology, Kogi State College of Education (Technical) Kabba,Kogi State, NG
2 Department of Physics, Federal University Lokoja, NG
Source
International Journal of Advanced Networking and Applications, Vol 13, No 5 (2022), Pagination: 5102-5107Abstract
This study presents the evaluation of signal strength and quality of a ku-band satellite downlink signals during raining season in Guinea Savanna region of Nigeria. Rain rate data and ku-band signal over Jos were retrieved from the Nigeria Meteorological Agency (NIMET). Rain rate data was measured using Davis Vantage Vue weather station while microwave signal were obtained using spectrum analyzer. The measured data were analyzed using Microsoft office excel. Rainfall is broadly classified into two types: stratiform (drizzle: ≤5mm/hr and widespread: >5≤25mm/hr) and convection (shower: >25≤50mm/hr and thunderstorm: >50mm/hr). Results were calculated based on ITU-Recommendations P.618-12 and P.838. The results obtained revealed that the effect of rain on signal strength and quality on a ku-band link depend on the rain type and duration of rainfall. The effect of drizzle (≤5mm/hr) on the ku-band link is not significant regardless the duration of rainfall. The results also shows that severe signal losses above 60dB were obtained under shower (>25≤50mm/hr) and thunderstorm (>50mm/hr). Also, widespread (>5≤25mm/hr) that prevailed for a longer period causes severe signal losses. This is to say that lower rain rate of about 25mm/hr that prevailed for a very long time have significant effect on Kuband link. The results of this study will serve as crucial design parameters for communication systems engineers for providing fade margins and developing accurate fade mitigation techniques (FMTs) for the Guinea Savanna region of Nigeria. It was observed from this study that the experimental studies within the Ku-band frequency are getting over exhausted. Therefore, experimental studied in the region of higher band like K and Ka are highly recommended.Keywords
Ku-Band, Downlink, Signal Quality, Signal Strength and Signal Loss.References
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- Dissanayake W. (2002). Ka-Band Propagation Modeling for fixed satellite application. Outline Journal of space communication. 1(2).
- Ezeh, G.N, Chukwuneke, N.S, Ogujiofor, N.C, Dialah H. (2014) Effect of Rain alternation on satellite communication Link: Advance in science and technology research journey. 8(22). 1-10.
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- Hossain M. M, Rahman. Md.m and Alim Md. A (2010). performance analysis of uplink and downlink Transmission in CDMA system. Journal of telecommunication. 1(1) page 84.
- Ogherohwo E.p, Jangfa T.Z and Ibrahim A.(2017). Analysis of satellite transmission losses due to tropospheric irregularities in Guinea saranmah region of Nigeria. Physics: Fupre journal of scientific and industrial research. 1(1) 60-103.
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- Zhimwang J.T, Ogherohwo E.P and Igbekele O.J (2018). Estimation of the long-term propagation losses due to rain on microwave satellite links over Jos, Nigeria. Fupre journal of scientific and industrial research. 2,(2) page 103-114.
- Isabona J., Odesanya I., J.T. Zhimwang, Risi I. (2022). Achievable Throughput over Mobile Broadband Network Protocol Layers: Practical Measurements and Performance Analysis. Int. J. Advanced Networking and Applications. 13(4): 5037-5044.
- Analysis of Frequency and Polarization Scaling on Rain Attenuated Signal of a KU-Band Link in Jos, Nigeria
Abstract Views :118 |
PDF Views:0
Authors
Zhimwang Jangfa Timothy
1,
Shaka Oghenemega Samuel
2,
Lagbegha-ebi Mercy Frank
3,
Ibrahim Aminu
4,
Yahaya Yunisa
5
Affiliations
1 Department of Physics, Federal University Lokoja, NG
2 Department of Science Laboratory Technology (Physics with Electronics), Delta State University, Abraka, NG
3 Department of General Studies, International Institute of Tourism and Hospitality, Yenagoa, NG
4 Centre for Satellite Technology Development, Abuja, NG
5 Department of Electrical/Electronics Technology, Kogi State College of Education (Technical) Kabba, NG
1 Department of Physics, Federal University Lokoja, NG
2 Department of Science Laboratory Technology (Physics with Electronics), Delta State University, Abraka, NG
3 Department of General Studies, International Institute of Tourism and Hospitality, Yenagoa, NG
4 Centre for Satellite Technology Development, Abuja, NG
5 Department of Electrical/Electronics Technology, Kogi State College of Education (Technical) Kabba, NG
Source
International Journal of Advanced Networking and Applications, Vol 14, No 1 (2022), Pagination: 5310-5317Abstract
This paper presents the analysis of frequency and polarization scaling on rain attenuated signal of a KU-Band link. The study was carried out in Jos, Plateau state, Nigeria (9.8965° N, 8.8583° E; 1192 meters) with Maximum, Average and Minimum Temperatures of 29.8°C, 22.8°C and 17°C respectively. Data were obtained for the months of May, June, July, August, September and October 2020.Davis Vantage Vue weather station was used to measured and record one-minute rain-rates from a minimum of 0.8 mm/h up to a value of 460 mm/h, with an accuracy of 0.2 mm/h. The precipitation data, with date and time is captured on the micro-chip of the wireless electronic data logger, which, when calibrated, logs on data every minute. The down converted Ku-band signal was fed into the digital satellite meter and a spectrum analyzer for signal level analysis, logging and recording samples of viewed spectrum over finite periods of time on a computer system. Both satellite signal and precipitation measurements were done concurrently. Data were analyzed using Microsoft excel and results were obtained based on ITU-R model. Results obtained revealed that rain attenuated signal for vertical and horizontal polarization varies for different rain rate and months under reviewed. For the month of May 2020, rain attenuated signal is more severe from rain rate of 100mm/hr with the highest rain attenuation of 25.57dB, 30.37dB, and 39.84dB at frequencies of 12GHz, 15GHz and 18GHz respectively while the rain attenuated signal for vertical polarization is more severe from 80mm/hr with highest recorded rain attenuation of 27.96dB, 40.33dB and 45.71dB at frequencies of 12GHz, 15GHz and 18GHz respectively. For the month of July 2020, the results shows that rain attenuated signal for vertical polarization is more severe from rain rate of 80mm/hr with the highest rain attenuation of 60.57dB, 73.37dB, and 100.84dB for frequencies of 12GHz, 15GHz, and 18GHz respectively. At Horizontal polarization, signal losses are more severe from 60mm/hr. The results further proves that frequency and polarization scaling of rain attenuated signalare major factors to consider when designing a microwave link budget especially in the study area that experiences high amount of rainfall annually.Keywords
KU-Band, Electromagnetic Frequency, Signal Polarization, Signal Loss and Rain Attenuation.References
- Abayomi Y.I.O. and Khamis. N. H. Haji, 2012. “Rain Attenuation Modelling and Mitigation in The Tropics: Brief Review,” International Journal of Electrical and Computer Engineering, vol. 2, no. 6, pp. 748–757,
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- Ajewole M. O. (2011) Radio and rain: Friends and foes 62nd inaugural lecture delivered at Federal University of Technology, Akure; June 21, 2011.
- Ayantunji, B.G., Mai-unguwa, H., Adamu, A. & Orisekeh, K. (2013). Tropospheric influences on satellite communication in tropical environment: A case study of Nigeria. International Journal of Engineering and Innovative Technology, 2(2): 111 – 116.
- Dissanayake W. (2002). Ka-Band propagation Modeling for Fixed Satellite Application, Online Journal of Space Communication Issue No.2.
- Ezeh G.N., Chukwuneke N.S., Ogujiofor N.C. and Diala U.H. (2014). EFFECTS OF RAIN ATTENUATION ON SATELLITE COMMUNICATION LINK. Advances in Science and Technology Research Journal.Vol. 8, No. 22, June 2014, pp. 1–11
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- Isabona Joseph, Odesanya Ituabhor, Jangfa Timothy Zhimwang, and Risi Ikechi (2022). Achievable Throughput over Mobile Broadband Network Protocol Layers: Practical Measurements and Performance Analysis. Int. J. Advanced Networking and Applications. 13(4).
- Yahaya Yunisa, Jangfa Timothy Zhimwang, Ogherohwo Enoh Pius, Ibrahim Aminu, Shaka Oghenemega Samuel, Frank Lagbegha-ebi Mercy (2022). Evaluation of Signal Strength and Quality of a Ku-Band Satellite Downlink during Raining Season in Guinea Savanna Region of Nigeria. Int. J. Advanced Networking and Applications. 13(5).
- Nigeria Digital Terrestrial Television Broadcasting : An Evaluation of the Transmitted Signal Received under Different Environmental Features in North-Central Region
Abstract Views :85 |
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Authors
Zhimwang Jangfa Timothy
1,
Enoh Pius Ogherohwo
2,
Agbalagba O. Ezekiel
3,
Yemi S. Onifade
3,
Shaka O. Samuel
4,
Ibrahim Aminu
5,
Mamedu Christopher Eshemokha
6
Affiliations
1 Department of Physics, Federal University Lokoja, NG
2 Department of Physics, University of Jos, NG
3 Department of Physics, Federal University of Petroleum Resources Effurun, NG
4 Department of Science Laboratory Technology, Delta State University, Abraka, NG
5 Centre for Satellite Technology Development, Abuja, NG
6 Digital Terrestrial Television Centre, Nigerian Television Authority Jos, NG
1 Department of Physics, Federal University Lokoja, NG
2 Department of Physics, University of Jos, NG
3 Department of Physics, Federal University of Petroleum Resources Effurun, NG
4 Department of Science Laboratory Technology, Delta State University, Abraka, NG
5 Centre for Satellite Technology Development, Abuja, NG
6 Digital Terrestrial Television Centre, Nigerian Television Authority Jos, NG
Source
International Journal of Advanced Networking and Applications, Vol 14, No 6 (2023), Pagination: 5722-5726Abstract
The Government of Nigeria in the year 2016 switched from analog television broadcasting to digital terrestrial television broadcasting with the focus of providing reliable quality of television services to users. Regardless of the advantages of digital Terrestrial television system over analog television and efforts make by Nigeria Government to improve broadcasting, Signal reception is observed to be very poor. Therefore, this study aimed at monitoring, evaluating and mitigating environmental factors that cause signal degradation as well as attempting to provide solutions that will enhance the reception of signal even under severe environmental conditions. The transmitted signal of digital Terrestrial television was measured and received under different environmental features within the coverage area. The antenna radiation field was divided into four distinct regions (North-East, North-west, South-east and South-west of the transmitter) where the characteristics of the radiated wave are observed and measured starting from distance of 10km, 20km, 30km, 40km, 50km, up to 100km for each of the region. It was observed that the transmitted signal received at different distances varies depending on the physical features along the signal path. The result also shows that space loss increases with increase in distance. This study will guide DTT operators within the study area to precisely choose a site for installing the transmitting antenna for effective transmission.Keywords
Digital Television, Environmental Features, Signal Transmission, Signal Reception, and Signal Quality.References
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