Inlämning av Examensarbete / Submission of Thesis

Danna Nigatu Mitiku; Onwuli Chinedu Lawrence MEE10:97, pp. 69. ING/School of Engineering, 2010.

The work

Författare / Author: Danna Nigatu Mitiku, Onwuli Chinedu Lawrence
mniga2@gmail.com, dubem55@yahoo.com
Titel / Title: COOPERATIVE COMMUNICATION TECHNIQUES IN WIRELESS NETWORKS (ANALYSIS WITH VARIABLE RELAY POSITIONING)
Översatt titel / Translated title: SAMVERKANDE KOMMUNIKATION Tekniker i TRÅDLÖS NÄTVERK (ANALYS MED VARIABEL RELAY PLACERING)
Abstrakt Abstract:

Signal transmission in Wireless Networks suffers considerably from many impairments, one of which is channel fading due to multipath propagation. Cooperative communication is a technique which could be employed to mitigate the effects of channel fading by exploiting diversity gain achieved via cooperation between nodes and relays. To achieve transmit diversity, a node would generally require more than one transmitting antenna which is not too common due to the limits in size and complexity of wireless mobile devices. However by sharing antennas with other single-antenna nodes in a multi-user environment, a virtual multi-antenna array is formed and transmit-diversity is accomplished. Subsequently, radio coverage is extended without the need to implement multiple antennas on nodes and increased transmission reliability is achieved.

In this scenario, a network containing a sender, a destination and a relay is analyzed. Two cooperative communication schemes which include Amplify and forward and Decode and
forward are employed with different combining techniques are investigated and results obtained from simulations with respect to variable relay positioning are presented.

Populärvetenskaplig beskrivning / Popular science summary: I denna avhandling undersökte vi om fördelarna med kooperativa mångfald inom trådlös kommunikation. Den lade fram en bred analys av de protokoll och kombinera teknik som kan användas när en virtuell MIMO miljö skapas genom en enda antenn mobiler i att dela sina antenner för att öka effektiviteten i signalöverföring.
Ämnesord / Subject: Telekommunikation - Telecommunications

Nyckelord / Keywords: Amplify-and-Forward, Bit-Error-Rate, Cooperative Communications, Decode and Forward, Performance Analysis, Signal-to-Noise-Ratio, Wireless Networks

Publication info

Dokument id / Document id:
Program:/ Programme Magisterprogram i Elektroteknik / Master of Science in Electrical Engineering
Registreringsdatum / Date of registration: 02/08/2011
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)

Context

Handledare / Supervisor: Prof. Abbas Mohammed
abbas.mohammed@bth.se
Examinator / Examiner: Prof. Abbas Mohammed
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: ING/School of Engineering

+46 455 38 50 00