Browsing by Author "Fifatin, F. -X. N."

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    Evaluation of Noise Effects on Power Line Communication in a Narrow and Wide Band Frequency Spectrum: A Case Study of Electricity Distribution Network of Ghana
    (Institute of Electrical and Electronics Engineers Inc., 2019) Acakpovi, A.; Mohammed, H.; Nwulu, N.; Fifatin, F. -X. N.; Nounangnonhou, T. C.; Abubakar, R.
    Power Line Communication (PLC) is a means of communication that uses the power line network medium to transmit data and signals. The PLC system is basically divided into Narrowband and Broadband PLC system. The PLC is considered to be one of the most favourable candidates for Advanced Metering Infrastructure (AMI). In the past Electricity Company of Ghana (ECG) used PLC (Narrowband-PLC) as a medium of Communication for smart prepaid metering but was unsuccessful due to hostile nature of the power line characteristics like electrical noise and interferences. Noise characterization of the power lines channel is very important for PLC systems design. In this paper, the measurements of noise properties injected by various loads in the Narrowband frequency 1-500 KHz and Broadband frequency 2-12 MHz spectrum are presented and discussed. The outcome of the study suggests that the Narrowband frequency region 1-500 KHz is marked with noise and therefore noise will have a negative impact on PLC categories operating under this region of frequency band. On the other hand, noise level on the Broadband frequency region 2-12 MHz was found to be minimal and therefore noise will have very little or no impact on the PLC Category operating under the Broadband frequency band (BB-PLC).
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    Modelling an Efficient Gap Filler for DTT Network Using ADS Software
    (Proceedings - 2019 International Conference on Computing, Computational Modelling and Applications, ICCMA 2019, 2019) Mensah, F.; Acakpovi, A.; Osumanu, F.; Sowah, R.; Fifatin, F. -X. N.; Nounangnonhou, T. C.
    This paper proposes the modelling and simulation of a special gap filler intended to cover grey areas in the DTT network of Accra. This has become necessary due to the numerous areas of low signal coverage in the Accra DTT and the incapability of previous methods to efficiently address the problem. The ADS simulation consists of arrangements of components from the DBV-T library which consists of filters, amplifiers and a power source. This setup mimics a gap filler system with a better noise reduction implementation, several frequency values are being used for the simulation process. A significant increase in the output signal as in comparison to the input means the shaded areas will be properly covered. The results derived from the simulation of the ADS setup highly improved upon the output signal values, when compared to the ITU standard. Three (3) out of five (5) simulation results show values beyond the minimum signal level requirement. Also using MATLAB, the RF propagation toolbox which has the map tool feature was able to implement the gap fillers into the Accra area and gave a visual representation of the signal strength. Modelling a gap filler system which has better noise cancellation and which propagates better with a dipole antenna was achieved in this paper. The outcome of the paper shows that the gap filler modelling increase signals in grey areas.