ABSTRACT There has been a steady increase in demand for clean and renewable energy globally. As a result, more effort has been put into research to harness solar energy from the sun to generate electricity using solar cells. Solar cells convert solar energy directly into electricity. Recent research findings indicate that properties of thin film solar cells strongly depend on the various deposition techniques chemical bath deposition (CBD) being one of them. This technique yields stable, adhe...
ABSTRACT A Mobile Ad-Hoc Network (MANET) is a popular type of wireless network that is formed by a collection of mobile nodes. Each node in such network has the capability to communicate with its neighbors and nonneighbors through a wireless medium designed to accommodate the properties of a self-organized environment without protection against any inside or outside network attacks. In addition to, it does not have any central authority to ensure that any node in the network it is not malici...
Abstract A Long Term Evolution (LTE) technology is the most possible candidate for next generation mobile wireless communications. One impairment of LTE is an interference from neighboring cells, so called Inter-Cell Interference (ICI). In this thesis Fractional soft FFR technique has been introduced for better utilization of frequency spectrum. In addition, beamforming technique is considered to be the solution to improve the performance of wireless communication systems, this thesis propos...
Abstract The demand was exceeded for speed to transmitting data, capacity and low cost that means there was a problem. The offers solution of limitation field in optical networks using Wavelength Division Multiplexing to increase the capacity and find the most cost-effective combination by designing four scenario unidirectional optical fiber(2,4, 6, and 8) users. In scenario four used Eridium Doped Fiber Amplifier to evaluate the system performance and study the effect of difference fiber le...
ABSTRACT This work present the design, construction and testing of a simple burglar alarmactivated by light, break beam and pressure sensor. The principle of operation of this burglar alarm is simple. When the ray of light falls on the light sensor the alarm is triggered and the siren begins to operate, the speaker beeps and the flasher (light) flashes. When an intruder walks through the break beam sensor the alarm is triggered and the siren begins to operate, the speaker beeps and...
ABSTRACT Achieving seamless homogeneous handover in mobile WiMAX due to its low cost and state of the art technology will enable ubiquitous broadband access to high volume applications especially with the high global increase in mobile subscribers. Extending this seamless handover across network technologies-heterogeneous handover- like WiFi will further lower cost, improve battery life and enable high productivity for end users. In this project, ways of optimizing handover in mobile WiMAX n...
ABSTRACT This thesis “Short Messaging System(SMS) Based Information Search and Retrieval System” describes a technology facility that will enable local information to be collected and put in a repository system (Database) such that a mobile user using the facility will be able to search for such information from any location where Global System for Mobile Communications(GSM) services are available. The work concentrates on developing the server-side program that will run as the search pro...
ABSTRACT The broadcasting stations in Nigeria often encounter sudden failures, which results in loss of signal that causes the station to experience down-time. Causes of the failures could be traced to the issues that range from erratic power supply to degradation in the studio equipment. Each failure and its consequent down-time influences the reliability of the station. In our environment (Nigeria) reliability does not only depend on the established parameters, instead it includes paramete...
ABSTRACT The purpose of this work is to make a contribution to the “Abuja grand design” by proposing a strategy that would facilitate making Abuja feature as a “modern city”. This proposal is entitled “Policy and Regulatory Framework for Fiber Optic Backbone in Abuja”. The main import of the strategy is to network every home and business in Abuja with fiber optics. The city fiber network would serve as a broadband communication medium to provide essentially unlimited and open...
ABSTRACT This project presents a system which is a power based auto select technology which automatically selects an active phase from a three phase supply, for single phase load. This eliminate the use or' conventional manual changeover using rewireable fuses. This design was implemented using a combination of Op-Amps 555 timer and relay (switch) circuit to achieve the set aim. Testing results showed that the load will continue to receive power even when failure occurs in any of the three ...
ABSTRACT The design and construction of a 50HZ, 240V 1 kV A inverter is primarily based on an inverter circuit which inverts the D.C. source voltage from a battery, AC voltage for AC powered appliances. The overall operation of this system comprises inter connections of many subcircuits to give optimum performances. The sub circuit include; the oscillator circuit, PWM circuit, driver circuit, low battery/overload shutdown circuit, charging control/soft charging circuit, surge protection circ...
ABSTRACT This report presents the design and implementation of contactless height measuring instrument. This project is based on developing and creating a device that utilizes ultrasonic sensors to determine height of an object ranging up to 200cm or 2m. The device is intended to be used as an alternative to the other more bulky and expensive models found either at home or at health centers. The ultrasonic height measurement device makes use of ultrasonic sound transducers to generate ultraso...
ABSTRACT This project is titled the design and constmction of an automatic water pump controller with level indicator. The project is designed to give a display of water level in a tank and control a pump motor as required. The reading given is in the scale of centimeter and percentage. The project circuitry mainly comprises an ATMEGA328P microcontroller which is the processing unit of the system, 16 X 2 liquid crystal display (LCD) which displays the level of the water in the water tank as ...
ABSTRACT This project presents a light activated switch for switching on and off electrical appliances using light dependent resistor (LOR) for its operation. The light dependent resistor changes or varies resistance with change in the intensity of light hitting its surface, this in turn is passed through a comparator to determine if the light intensity can be said to be day through the resistance entering the comparator. It can however be programmed to act as a light activated switch or as ...
ABSTRACT The project presents a currency counting machine with fake note detection. Over the past few years, there has been a large amount of counterfeit money in circulation, usually manufactured by illegal counterfeit rings with the aid of great technological advances. This money is usually spent in public places like a market, buses, etc. This money keeps moving in circulation until it gets to the bank where they notice that the currency is fake and the money is then confiscated, leaving...