Spectrum Occupancy in Rural Nigeria: A Case for A Lightly Licensed Spectrum Band for Rural Broadband Enhancement

Ubom, Emmanuel A.; Akpanobong, Aloysius C.; Ukommi, U.

doi:10.5121/ijcsit.2019.11407

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…A research study conducted in [23], in Nigeria found that there is a need for more bandwidth for secondary rural broadband service providers due to high VHF band spectrum utilization in three villages. The UHF band usage was 33%, 41%, and 55% in Asong, Ikot Akpabio, and Afaha-Offiong, respectively.…”

Section: Introductionmentioning

confidence: 99%

Spectrum Occupancy Analysis of Active Fm Band in Osogbo Metropolis

Alawode,

Adebayo,

Lasisi

et al. 2024

UJEES

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An investigation was conducted to ascertain the FM band (88-108) MHz spectrum occupancy measurement within Osogbo, Nigeria over a period of 48 hours. The energy detection method was used to analyze the spectrum data, and a threshold of 5 dB/Hz above the noise level was put in place. The Fountain University Osogbo campus, the Atelewo Fire Station, the Uniosun Osogbo campus, and the National Control Centre Osogbo were the four venues for the campaign measurement of the spectrum occupancy. The fieldwork analysis led to the deduction that the Uniosun campus experienced a maximum duty cycle of 99.48% spectrum occupancy at band 9 of frequency 91.625 MHz and band 35 of frequency (104.375-104.5) MHz. Of the four locations, the Uniosun campus had the highest average duty cycle of 89.81% spectrum occupancy and the highest power spectral density of -67.50 dB/Hz. The maximum average power spectral density of -87.89 dB/Hz is recorded at the National Control Center. The Uniosun campus had the highest number of active channels, with 574 channels located at band 9 of frequency channel 91.625 MHz and band 35 of frequency channels (104.375-104.625) MHz. The university campus also had the highest average number of active channels, with 518 channels.

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Section: Introductionmentioning

confidence: 99%

Spectrum Occupancy Analysis of Active Fm Band in Osogbo Metropolis

Alawode,

Adebayo,

Lasisi

et al. 2024

UJEES

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Impact Assessment of Elevation Angles on Signal Propagation at VHF and UHF Frequencies for Improved Rural Telephony

Ukommi,

Ubom

2023

AJERD

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Rural telephony is challenging in the remote part of Nigeria due to inadequate telecommunication infrastructure, exorbitant cost of communication systems and poor road network for extension of fiber network. These factors constitute poor or no cellular network services in many villages. Alternatively, using Television White Space (TVWS) technology to facilitate telephony services in the rural areas through Ultra High Frequency (UHF) and Very High Frequency (VHF) spectrum is cost effective. Thus, this research investigates impact of elevation angle on signal propagation at UHF/VHF frequencies. The experimental test scenarios took measurements of received signal quality performance at different elevation angles and transmit power levels to obtain more stable results for substantive inference. The experimental test scenario considered a communication link, operating at UHF frequency of 436 MHz. During the experiment, azimuth and propagation loss for the communication link were kept constant while the receiving antenna elevation angles were varied to assess the impact of elevation angles. The assessment examined results obtained during the experiment. Comparing the received signal quality performance at zero (00) elevation angle, it has been observed that the received signal quality improves when the transmit power allocation increases. Results further show that for a given transmit power level of 34dBm, at zero (00) elevation angle test configuration, received signal quality performance of 1.80 dB, 6.90 dB at 300 elevation angle and 10.9 dB at 600 elevation angle were obtained, compared to improved quality performance of 11.8 dB at 00 elevation angle, 19.90 dB at 300 elevation angle and 24.92 dB at 600 elevation angle when the transmit power level was increased to 46.98 dBm. It is deduced from the experimental results that elevation angle of receiving antenna has significant influence on the received signal quality performance. This insight is very useful in the design and network planning of rural telecommunication services using TVWS frequencies for improved rural broadband penetration.

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Circular Microstrip Antennas in 5G: Evaluating Metamaterial Integration

Oluwafemi,

Ukommi,

Ubom

et al. 2024

AJERD

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The rapid emergence of Fifth-Generation (5G) technologies necessitate the development of highly efficient antenna systems with compact design that can support Ultra-Wideband (UWB) frequencies. This work presents the design and enhancement of a Circular Microstrip Antenna (CMSA) for 5G UWB applications using metamaterials. The study focuses on the design of CMSA and the integration of a Complementary Split-Ring Resonator (CSRR) into the circular patch of the CMSA. The design is simulated using Computer Simulation Technology (CST) Studio 2023. The system design without metamaterials achieved a gain of 5.28 dBi and a bandwidth of 353.0 MHz. The integration of the CSRR led to an improvement in gain, 5.39 dBi at 3.8 GHz, which is above most of the literature reviewed, although there was a slight reduction in bandwidth to 135.2 MHz. The objectives of achieving a CMSA design with a gain between 5 to 10 dBi while maintaining a compact size were accomplished. Despite the slight reduction in bandwidth observed when integrating the CSRR into the CMSA, the overall results highlight the significant role metamaterials played in enhancing the performance of microstrip antennas for 5G technology applications.

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Spectrum Occupancy in Rural Nigeria: A Case for A Lightly Licensed Spectrum Band for Rural Broadband Enhancement

Cited by 3 publications

References 15 publications

Spectrum Occupancy Analysis of Active Fm Band in Osogbo Metropolis

Spectrum Occupancy Analysis of Active Fm Band in Osogbo Metropolis

Impact Assessment of Elevation Angles on Signal Propagation at VHF and UHF Frequencies for Improved Rural Telephony

Circular Microstrip Antennas in 5G: Evaluating Metamaterial Integration

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