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Browsing Communication Engineering by Issue Date

Browsing Communication Engineering by Issue Date

Now showing items 1-20 of 107

Simulation of Flight Following System

Mathewos, Essatu (Addis Ababa University, 1989-06)

The simulation of the flight following system i6 primarily chosen in the interest of Ethiopian Airlines need to implement the system to replace the currently used flight following system which is based on verbal ...
Design and Realization of an Audio Frequency Filter Unit for Shortwave Communication System Using TMS320CSO DSP Kit

Mengesha, Seble (Addis Ababa University, 1998-12)

Causes that may affect the quality of shortwave data communication over radio are presented. Designing an audio-frequency filter unit, other than the filters exist in the transceiver, is considered as one solution to ...
Design and Realization of Adaptive Channel Equalizer for Shortwave Communication using TMS320C50 DSP Kit

Ayalew, Mesfin (Addis Ababa University, 2003-12)

The high frequency (HF) band is a cost effective medium for a long distance transmission beyond the horizon, for limited bandwidth of up to 3 kHz. However, the HF channel is simultaneously a time and frequency dispersive ...
Long Distance Point-to-Point Wi-Fi Link for Connectivity in Rural Areas of Ethiopia

Miresa, Talile (Addis Ababa University, 2005-06)

Internet coverage in rural areas of Ethiopia is extremely limited which, in turn, limits access to knowledge, education, health, commerce and other important services. As rural areas are characterized by low-income, ...
New Bandwidth Allocation Scheme for Handover Voice Calls in Mobile Cellular Networks

Wakijira, Fikadu (Addis Ababa University, 2006-08)

The demand of mobile communication has grown remarkably in past years. Mobile communication network (system) should use limited resources in efficient and convenient manner. One way of achieving this is to use smaller ...
Performance Study of Space-Time Coding over Spatially Correlated Rayleigh Fading Channel

Kiros, Mulugeta (Addis Ababa University, 2007)

In this thesis we discuss the space-time block coding, a new paradigm for communication over Rayleigh fading channels using multiple transmit antennas with out information of the channel at the transmitter. Data is encoded ...
Handoff Initiation and Performance Analysis in Cdma Cellular Systems

Sori, Negassa (Addis Ababa University, 2007-02)

Mobile terminals allow users to access services while on the move. This unique feature has driven the rapid growth in the mobile network industry, changing it from a new technology into a massive industry within less ...
Performance Evaluation of Interference Cancellation using SIC and PIC for WCDMA Systems

Kebede, Gebru (Addis Ababa University, 2007-09)

Third generation wireless communications in conjunction with multimedia services has produced an increased demand for bandwidth efficient multiple access schemes. The need for increased capacity and improved performance ...
Performance of Beamforming Techniques Using Uplink Channel Characteristics in Cellular CDMA Communication Systems

Dida, Degebassa (Addis Ababa University, 2007-09)

The demand of code division multiple access (CDMA) cellular communication has grown remarkably in the past few years. Due to this reason mobile communication networks should use the limited resources of the system in ...
Performance Analysis of CDMA Based Wireless Local Loop (WLL) Communication, Case of ETC’s Implementation in Addis Ababa

Zeleke, Getu (Addis Ababa University, 2007-10)

The demand for CDMA –WLL, Wireless Local Loop, Communication system is higher than wired network. The CDMA–WLL system in Addis Ababa is providing voice and data communication services. Because of its fast and reliable ...
Analysis of Electronic Attack Under Uav Platform Jamming

Getnet, Ashagrie (Addis Ababa University, 2008)

Ground base jammer cannot provide air space dominance for Ethiopia due to the massive highland complex of the country characterized by high rising mountains and dissected plateaus. In addition to this if high-flying ...
Comparative Study on Bandwidth Enhancement Techniques of Microstrip Patch Antenna

Hailu, Zewdu (Addis Ababa University, 2008-01)

Conventional microstrip antennas in general have the attractive features such as low profile, light weight, easy fabrication, and conformability to mounting hosts. However, microstrip antennas inherently have a narrow ...
Bandwidth Improvement of Microstrip Antenna Using Log Periodic Technique

Maare, Mekonen (Addis Ababa University, 2008-03)

The thesis covers two aspects of microstrip antenna designs. The first is the analysis and design of single element narrowband rectangular microstrip antenna which operates at the central frequency of 2.4 GHz and the ...
Synthetic Speech Trained - Large Vocabulary Amharic Speech Recognition System (SST-LVASR)

Birile, Mesfin (Addis Ababa University, 2008-07)

Amharic is the official language of Ethiopia, which is characterized by very large morphological forms of words. This thesis is an investigation of the possibility of developing an Automatic speech recognition system ...
Usb Interface for Communication Between Fpga and Personal Computer

Tadesse, Abiy (Addis Ababa University, 2009-03)

The USB Interface provides capability of utilizing the new bus standard to interface programmable device designs to personal computers. This is useful for real time applications such DAS. The USB Interface is described in ...
Investigation of Mobile Station Position Location Technique for Cellular System

Kefyalew, Dawit (Addis Ababa University, 2009-08)

Wireless position location (PL) is a relatively recent technology in the field of wireless communication. The US federal communication commission FCC recommendation is the driving force for PL research since it requires ...
Analysis and Design of A Compact Microstrip Patch Antenna With Enhanced Bandwidth and Gain for Wireless Local Area Network (Wlan) Communications

Debo, Feyisa (Addis Ababa University, 2010-07)

In this thesis, the compact microstrip patch antennas in stacked configuration have been proposed. The microstrip patch antenna structure consists of a square patch with four equal u-shape on four sides of each patches. ...
Bandwidth and Gain Performance Comparison Of Rectangular-Patch Microstrip Antenna (RMSA) And Coplanar Waveguide (CPW) Rectangular-Patch Antenna

Abiy, Bekele (Addis Ababa University, 2011-01)

In today’s world, microstrip antenna and coplanar waveguide patch antenna are used in all wireless communication such as cellular telephony, satellite, portable personal communication, aircraft, spacecraft, and missile ...
Performance Analysis of Space Time Coding on Mimo and Cooperative Diversity System

Girma, Dereje (Addis Ababa University, 2011-07)

In a wireless network, users can relay information to exploit cooperative diversity, thereby increasing reliability. The uses of multiple transmit and receive antennas (MIMO) can help to exploit transmit and receive ...
Performance Evaluation of Receivers for Ultra-Wideband Wireless Communication Systems

Yenieneh, Welelaw (Addis Ababa University, 2011-07)

Ultra Wide Band (UWB) is a promising technology for short range broadband wireless data communication, sensor networks, radar imaging and target identification, location finding and positioning applications. This technology ...

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Browsing Communication Engineering by Issue Date

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