Signal Strength Variation and Propagation Profiles of UHF Radio Wave Channel in Ondo State, Nigeria

Akinbolati, Akinsanmi; Akinsanmi, Olaitan; Ekundayo, K.R.

doi:10.5815/ijwmt.2016.04.02

Cited by 17 publications

(21 citation statements)

References 2 publications

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“…Therefore, the primary focus in this paper is to technically investigate this proposal made in [13]. The study presented in this paper was also motivated by the encouragement given by the International Telecommunications Union Radiocommunication Section (ITU-R), which reported in [14] that scientists and engineers should carry out research that would lead to the development of signal propagation models suitable for their respective localities. It was on this premise and the proposal in [13] that the study presented in this paper was conceived to investigate the proposal raised as well as developing suitable propagation models for VHF broadcast systems in Lagos State and Ondo State, Nigeria.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Need for Specific Propagation Model for Specific Environment Based on Different Terrain Characteristics

Popoola

Ponnle

Olasoji

et al. 2018

IIUMEJ

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Owing to their speed of excution as well as their limited reliance on detailed knowledge of the terrain characteristics of the service environments, empirical propagation models have enjoyed general acceptability in the wireless communication research community. However, recent industrial observations show that no single propagation model can best fit all the radio service environments, which led to the hypothesis of specific models for specific environments. In order to scientifically verify this hypothesis, the study presented in this paper investigated the performance of the free space propagation loss (FSPL) model in two different radio environments characterised with different types of obstructions. The investigation was conducted through field strength distribution measurement of two broadcasting radio stations transmitting at 96.5 MHz and 102.3 MHz. The field strength measurement data obtained were analysed. The result of the analysis shows gross disparity between the measured path losses and calculated path losses using FSPL model. The disparity thus necessitates the modification of the FSPL model in order to develop each propagation model for each of the two radio stations employed and their environment. The developed models were then evaluated to ascertain their performances relative to the FSPL model. The performance evaluation results show that the predictions of the developed propagation models vary for each of the two environments. Furthermore, the comparative performance evaluation result of the developed models with similar studies in the literature shows that the developed models perform favourably. The overall result from the developed models confirms the hypothesis that each location requires a specific propagation model for proper radio wave design and quality of signal transmission and reception. ABSTRAK: Kelebihan yang ada pada kelajuan perlaksanaannya dan juga kurang pergantungannya pada butiran terperinci ciri-ciri khusus bentuk rupa bumi di persekitaran servisnya, model penyebaran empirik telah diterima umum dalam komuniti kajian komunikasi tanpa wayar. Walau bagaimanapun, pemerhatian industri terkini menunjukkan tidak ada sebarang model penyebaran yang sesuai bagi semua keadaan servis radio, ini menghala kepada hipotesis keperluan model tertentu pada keadaan servis tertentu. Bagi menentusahkan secara saintifik hipotesis ini, kajian yang dibentangkan dalam kertas ini mengkaji tentang prestasi model kehilangan penyebaran pada ruang bebas (FSPL) dalam dua persekitaran radio berlainan melalui beberapa jenis halangan berbeza. Kajian telah dijalankan ke atas dua stesen radio penyiaran pada frekuensi 96.5 MHz dan 102.3 MHz melalui ukuran sebaran ruang keupayaan. Data ukuran ruang keupayaan telah diperoleh dan dianalisa. Keputusan analisis menunjukkan keputusan tidak seragam yang melampau antara ukuran kehilangan laluan dan pada kiraan model FSPL. Ketidaksamaan ini memungkinkan keperluan mengubah model FSPL bagi membangunkan model penyebaran pada setiap dua radio stesen yang digunakan dan persekitarannya. Model yang dibangunkan ini kemudiannya dinilai bagi mengesahkan prestasinya dengan model FSPL. Keputusan penilaian menunjukkan perbezaan pada jangkaan model penyebaran bagi setiap dua keadaan. Tambahan, keputusan perbandingan model yang dibangunkan dalam karya ini adalah serupa seperti kajian lain yang berkaitan. Secara keseluruhannya model yang dibangunkan ini mengesahkan hipotesis bahawa setiap lokasi memerlukan model penyebaran bagi rekaan gelombang radio yang sesuai dan juga kualiti signal penyebaran dan penerimaan.

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Section: Introductionmentioning

confidence: 99%

Investigation on Need for Specific Propagation Model for Specific Environment Based on Different Terrain Characteristics

Popoola

Ponnle

Olasoji

et al. 2018

IIUMEJ

View full text Add to dashboard Cite

show abstract

“…The work by Mardeni and Kwan (2010) proposed the optimized Hata path loss empirical model using the least square method for Malaysia while Nadir (2011) investigated seasonal path loss model prediction for Oman. The work by Nadir (2011) Akinbolati et al (2016) with the aims of optimizing the path losses for the investigated cities.…”

Section: Introductionmentioning

confidence: 99%

Propagation Profile and Signal Strength Variation of VHF Signal in Ekiti State Nigeria

Oluwafemi¹,

Femi-Jemilohun²

2017

IJWMT

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This paper presents the experimental results of a study on radio frequency attenuation path loss conducted in Ekiti State, Nigeria. The objective of the study is to develop a path loss model comparable to the existing path loss models through a real time application of outdoor VHF signal propagation measurements of the Nigeria Television Authority (NTA) Channel 5 and carrier frequency of 175.25 MHz located in Ado-Ekiti, Ekiti State, Nigeria. Experimental measurements were taken in three routes covering the entire state. Analysis of the data collected from the experiments resulted in models which are in agreement with the existing standard models. Root Mean Square Errors were calculated for all the path loss models. Results show that the signal of the station was generally poor along the routes considered as the deviations of the measured path losses from the free space path loss exceed 6 dB in most cases.

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“…A plot of electric field intensity against distance yields propagation curve. Propagation curve is the variation of theelectric field intensity of the radio signals with distance [13,14]. It represents the reduction in electric field intensity along the propagation path.…”

Section: Introductionmentioning

confidence: 99%

Investigating propagation curves of electric field intensity of Jigawa Medium Frequency Radio Transmitter

Adenodi¹

2019

Nig. J. Tech.

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This study investigates the variations in the electric field intensity of Jigawa Medium Frequency (MF) radio signal along some radio routes using propagation curve. It also compares the propagation curves due to measured field intensity with those predicted by GRWAVE software using the ground electrical conductivity of the routes. The need to predict propagation curves using GRWAVE software and compare same with empirical curves to ascertain the adequacy and suitability of the predicted curves to characterize MF propagation in Northern Nigeria is the motivation for this study. Electric field intensity data were acquired with the aid of Potomac electric field intensity meter and a Garmin 38Global Position System (GPS) receiver registered both coordinates and elevations along the routes. Theoretical equation was used to deduce the values of ground electrical conductivity from the measured field intensity and the values were used along with the transmitter configuration in GRWAVE software to compute the predicted field intensity. Results reveal experimental propagation curves are fairly higher compared to predicted curves. At 30 km from the transmitter, the values of measured and predicted electric field strength are 1.30 and 1.06 mV/m along Tundun Wada route, 1.50 and 1.11 mV/m along Azare route, 1.40 and 1.15 mV/m along Kefin Hausa route, 1.41 and 1.13 mV/m along Kogin Maikaho route, 1.26 and 1.03 mV/m along Kundun route, 1.50 and 1.11 mV/m along Fulani route, and 1.25 and 1.11 mV/m along Dutse Kan route. Therefore GRWAVE software can be used to predict propagation curves suitable for MF propagation in Northern Nigeria using the ground electrical conductivity of the terrain.

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Signal Strength Variation and Propagation Profiles of UHF Radio Wave Channel in Ondo State, Nigeria

Cited by 17 publications

References 2 publications

Investigation on Need for Specific Propagation Model for Specific Environment Based on Different Terrain Characteristics

Investigation on Need for Specific Propagation Model for Specific Environment Based on Different Terrain Characteristics

Propagation Profile and Signal Strength Variation of VHF Signal in Ekiti State Nigeria

Investigating propagation curves of electric field intensity of Jigawa Medium Frequency Radio Transmitter

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