Abstract
This research examines the coverage areas of very high frequency (VHF) and ultrahigh-frequency UHF) signal strength of terrestrial television stations (CRBC Calabar and AKBC Uyo) located within two states of proximity 99.4 km apart within the same South-South zone of Nigeria within the same climatic zone (Tropical). Measurement of the Expected Signal Strength (ESS) was carried out along the different routes and Local Government Areas (LGAs) of the states with each of the terrestrial television stations reference points about 15 and 45 km radius respectively from the base station, using Calabar and some LGAs as a case study considering the city closest to the VHF Channel 11 transmitting at radio frequencies between 54 and 216 MHz, and UHF channels at 470 and 890 MHz. A Digital cable Television Analyser (CATV) with an external television antenna of 59 (L) × 8.5 (W) × 11 (H) cm on a pole of about 9 m and a GPS receiver were used to measure the geographic coordinates, elevation and Line of Sight (LOS) of data points along the routes in a driving test. The VHF and UHF transmitters were measured radially along several routes with the transmitting stations at focus. Their corresponding distances from the transmitting stations and locations were also measured. The measurements at different locations within the 15 and 45 km of the reference points were conducted. The (CATV) has a frequency range from 40 to 890 MHz; while tuning from channel 1 through 69. The locations were segmented into primary, secondary and fringe zones for proper signal testing and collation. The analyses of channel 11 across all the LGAs show that 5% fall in the primary coverage zone with 60.4 dB μV signal strength, ≤ 60% dwells in the secondary coverage zone with ≤ 60 dB μV signal strength while ≤ 30% dwells in the fringe zone of ≤ 30 dB μV signal strength. Channel 27 shows 40% are in the fringe zone. A situation which shows over 50% of the city is unable to receive clear signals from the broadcasting stations and Channel 45 identified 97% are in the fringe zone of this signal. The highest signal strength of 60.4 dB μV was measured around the Ikot Ebong Eyo axis (72 km) and faded completely at Effio-Ette (96.2 km) and Satellite town (98.8 km). Analysis shows that Calabar city, which is the closest to the VHF Channel 11 transmitting station is not within the primary coverage area of the transmitting station because the signal strength measured is approximately 60.4 dB μV. The Path loss of the different channels (11, 27, 45), confirmed 47 dB signal loss along the line of sight with a steep regression of the signal strength with distance; and a high increasing path loss which further established the poor quality of signal strength received by the residents which further shows the area where the base station is sighted is not a primary coverage zone based on the measured data. The results obtained showed that the present configurations of the transmitters for all the television stations did not give an optimum coverage area. Only 30% of the entire landmass of the state has television signal coverage during the rainy season. Consequently, some areas in the state are completely out of television signal coverage. So there is a need to have repeater stations at certain intervals to provide reception of television signals for all the parts of the states. The overall results will enable System Engineers to know the appropriate distance(s) and locations to site additional stations for networking purposes and prepare a power budget for optimum coverage area and good quality of services for terrestrial digital channels.
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Abbreviations
- AKBC:
-
Aqua-ibom broadcasting cooperation
- CRBC:
-
Cross River broadcasting cooperation
- LOS:
-
Line of sight
- QOS:
-
Quality of service
- ESS:
-
Expected signal strength
- %:
-
Percentage
- KM:
-
Kilometer
- RSS:
-
Received signal strength
- CATV:
-
Digital cable television analyser
- ≥:
-
Greater than
- ≤:
-
Less than
- LGAs:
-
Local government areas
- UHF:
-
Ultrahigh-frequency
- VHF:
-
Very high frequency
References
Ajayi, G. O., & Owolabi, I. E. (1979). Coverage area of the 10 kw, 702 kHz Medium Wave Transmitter at Minna and Feasibility Studies for full Radio Coverage of Niger State, Electrical Communication Consultancy Unit (ECCU), Department of Electrical and Electronics Engineering, University of Ife (pp 1–4, 6–8).
Hall, M. P. M. (1991). Overview of radio wave propagation. In M. Hall (Ed.), Radio wave propagation—(IEE Electromagnetic Wave Series) (pp. 1–21). Peter Peregrinus Ltd.
Barclay, L. W. (1991). Basic radio system parameters. In Hall, M. (Ed.) Ibid (pp. 43–62).
Aniefiok, O. A. (2019). Signal attenuation effect on the reception of VHF/UHF terrestrial broadcasting in Oron and its environment, Nigeria IOSR journal of electronics and communication engineering (IOSR-JECE) (Vol. 14, No. 5, Ser. I, pp. 26–38). e-ISSN: 2278–2834, p-ISSN: 2278–8735, https://doi.org/10.9790/2834-1405012638. https://www.iosrjournals.org.
Bassey, D. E., Effiong, G. O., Omini, O. U., & Obisung, E. O. (2019). Empirical studies on topographical influences on Crbc/Akbc terrestrial television stations’ signals in Akpabuyo Local Council Area, Nigeria. Journal of Computer and Communications, 7, 50–71. https://doi.org/10.4236/jcc.2019.79005
Ajewole, M. O., Oyedum, O. D., Moses, A. S., & Eiche, J. O. (2010). Measurement of electric field strength to determine the coverage areas of VHF and UHF television signals in Niger State, Nigeria. In NURS 2010 conference proceedings (pp. 113–118).
Felix, A. N., Ozuomba, S., & Faithpraise, F. O. (2019). Development of Fuzzy Inference System (FIS) for detection of outliers In data streams of wireless sensor networks. International Multilingual Journal of Science and Technology (IMJST), 4(10), 2783–2792.
Oyetunji, S. A. (2013). Determination of propagation path loss and contour map for FUTA FM Radio Federal University of Technology Akure, Nigeria. IOSR Journal of Electronics and Communication Engineering (IOSR-JECE), 6(3), 4–9.
Kenedy, G., & Davis, B. (1999). Electronic communication systems, 4th edn. Tata McGraw-Hill ISBN 0-02-800592-9 (p. 236).
Lev, A. O., & Alexander, I. P. (2002). Modulated waves: Theory and application. Johns Hopkins University Press. ISBN 0-8018-7325-8.
Kafukwilwa, J. L. (2015). Coverage prediction and validation of digital terrestrial television implementation in Zambia. A dissertation submitted to University of Zambia in partial fulfilment of the requirements for the degree of Master of Engineering in Telecommunication Systems, University of Zambia Lusaka.
Geetha, K., & Kannan, A. (2019). An efficient information system for providing location based services in network environments. Wireless Personal Communications. https://doi.org/10.1007/s11277-019-06686-3
Charles, M. O., & Faithpraise, F. O. (2016). Observed variations in HF propagation over a path aligned along the mid-latitude trough. IOSR Journal of Electronics and Communication Engineering, 11(3), 76–86.
Qaysar, S. M. (2018). Prediction of mobile radio wave propagation in complex topography Eurasian. Journal of Science & Engineering, 4(1 (Special Issue)), 49–55.
Mardeni, R., & Kwan, K. F. (2010). Optimization of Hata propagation prediction model in suburban in Malaysia. Progress in Electromagnetics Research C, 13 :91–106. https://doi.org/10.2528/PIERC10011804
Amajama, J., Mopta, S. E., Faithpraise, F. O. (2016). Variation of tropospheric radio wave refractivities across northern Nigeria—The Savannah. International Journal of Engineering Research and General Science, 4(3). 474–480.
Akinbolati, A., Ajewole, M. O., Adediji, A. T., & Ojo, J. S. (2020). Propagation curves and coverage areas of digital terrestrial television base stations in the tropical zone. Heliyon., 6(3), e03599. https://doi.org/10.1016/j.heliyon.2020.e03599
Clement, E., Ozuomba, S., & Faithpraise, F. O. (2020). Modelling and forecasting peak load demand in UYO metropolis using artificial neural network technique. Journal of Multidisciplinary Engineering Science and Technology (JMEST), 7(3), 3610–3615.
Seybold, J. S. (2005). Introduction to RF propagation (pp. 144–146). Wiley.
Nwalozie, G. C., Ufoaroh, S. U., Ezeagwu, C. O., & Ejiofor, A. C. (2014). Path loss prediction for GSM mobile networks for urban region of Aba, South-East Nigeria. International journal of computer science and mobile computing, 3(2), 267–281.
Egli, J. J. (1957). Radio propagation above 40 MC over irregular terrain. Proceedings of the IRE (IEEE), 45(10), 1383–1391. https://doi.org/10.1109/JRPROC.1957.278224 ISSN0096-8390.
Sona, M., Endam, A. Y., Mehmet, D. O., & Burcu, Ş (2015). Examining the global digital divide: A cross-country analysis. Communications of the IBIMA, 2015(2015), 592253. https://doi.org/10.5171/2015.592253.
Nadir, Z., Elfadhil, N., & Touati, F. (2009). Path loss determination, using Okumura-Hata Model and Spline Interpolation for missing data for Oman. In Proceedings of Journal of World Congress.
Ajewole, M. O., Akinbolati, A., Adediji, A. T., & Ojo, J. S. (2014). Precipitation effect on the coverage areas of terrestrial uhf television stations in Ondo State, Nigeria. International Journal of Engineering and Technology, 4(9), 524–535.
Griffiths, D. J. (1999). Introduction to electrodynamics (3rd edn., pp. 301–303). Prentice hall. ISBN 0-13-805326-X.
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Faithpraise, F.O., Bassey, D.E. Evaluation of the Signal Coverage Zone Segmentation of Broadcasting Stations in Calabar Nigeria. Wireless Pers Commun 123, 555–574 (2022). https://doi.org/10.1007/s11277-021-09143-2
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DOI: https://doi.org/10.1007/s11277-021-09143-2