Evaluation and Performance of Path Profile Characteristics in Communication System

This study presents the evaluation and performance of path profile characteristics in communication system, to determine the path profile characteristics such as margin fade (dB), receiver power (dBm), 2-ray propagation model (dB), free space propagation model (dB), LOSMAX (km) and critical distance (km). Data were obtained from Network ‘A’, using three different links within a geographical location in Edo State. Receiver power is mathematic model, the sensitivity of the receiver, which depends on the bandwidth (data rate) (dBm) of antennas were considered in this analysis. All the path profile characteristics were determined, it was observed, that increase in path length distance of microwave line of sight, will necessitate the increase in transmitter power in decibel. The Path length distance and margin fade of the three basic mobile propagation links were determined. It was observed that path length distance characteristic as such the length of distance, obstacle, reflection, diffraction from ground, water bodies and atmosphere resulted to the pattern of radio margin fade signal obtained in receiver antenna. The margin fade determined are 28.83 dB, 12.95 dB and 21.24 dB for the three different links considered from Network ‘A’ in Auchi, Nigeria

Analysis of energy revenue and electrical power losses in distribution line

This study presents the analysis of energy revenue and electrical power losses in distribution network, aimed to determine the energy losses on power distribution system. The 11kV power transmission line at Ujokuen community feeding to Benson Idahosa University was investigated. The following data were obtained as follow: energy delivered, energy billing, total cash amount, billed collected and correspond percentage. From the research work various technical power losses associated with power distribution network were determined and their effect on energy delivered and energy billing and corresponding difference under the area of investigation. It was observed that energy delivered is not constant or linear for the year 2013. The comparison of energy delivered and energy billed for various years were determined. It was observed that there is decreased in energy delivered and energy billed from 2013 to 2015 and the system witnessed a slightly increase of energy delivered and energy billed from 2016 to 2018. The energy level differentials are due to copper losses, energy theft and core loss

An Innovative Technique in Switching Electrical Appliances: An Omni-Directional RF Remote Control Switch Mechanism

Remote control systems for electrical appliances over the years have adopted the infra-red mechanism where the user is expected to point the controller towards the appliance before operation. This requires the user not only to be in the line of sight of the appliance but in close proximity to the appliance. The technique presented in this study is an omni-directional remote control system, which utilizes a Radio Frequency (RF) transmitter and receiver system. The piezoelectric crystal oscillator used in the implementation of the system operates at a frequency of 84 1.1I-Iz. It is an especially accurate form of electronic oscillator. The modulated signal is transmitted to the receiver in the RF band. The receiver, incorporated into the appliances sends the signal to the logic nnit. Through, the help of timer and digital connter ICs the relays receive signals to switch the appliance on or off as required. An operational distance of 35 m was realized