Inlämning av Examensarbete / Submission of Thesis

Mohsin Kamal; Theera Yukong , pp. 49. ING/School of Engineering, 2012.

The work

Författare / Author: Mohsin Kamal, Theera Yukong,
Titel / Title: Performance Evaluation of 2-Hop and 3-Hop Relay Network using DF, AF and DAF Relaying Protocols
Abstrakt Abstract:

Cognitive radio is an evolving wireless technology employed to increase the frequency spectrum utilization of the limited spectral resources. Cooperative communications has been established as a potential method of solving the fading effects in wireless communications, improving the reliability of network performance, network throughput, and adaptability.

In this thesis, the cooperative diversity is achieved by using 2-hop decode amplify and forward (DAF) and 3-hop decode and forward (DF) and amplify and forward (AF) relaying protocols in cognitive radio network. The data is encoded by using Alamuti space time block codes (STBC) and transmitted over a wireless Rayleigh fading channel. The distance and the number of relays are variable parameters which affect the performance of the cooperative cognitive radio network. In order to sense the presence or absence of Primary User (PU) signal within a spectrum in a cognitive radio network, energy detectors are used at the cognitive controller. If energy of PU is less than a threshold then it indicates that PU is absent and vice versa. The probability of detection and Bit Error Rate (BER) will vary in 2-hop and 3-hop relay networks.

In this thesis, we present methods of how different relaying protocols affect the efficiency of the cooperative cognitive radio network and the probability of detection of the PU.

Ämnesord / Subject: Telekommunikation - Telecommunications

Nyckelord / Keywords: Amplify and Forward, Decode and Forward, Decode Amplify and Forward, Relay network, 2-hop and 3-hop cognitive radio networks

Publication info

Dokument id / Document id: houn-8twsbb
Program:/ Programme Magisterprogram i Elektroteknik / Master of Science in Electrical Engineering
Registreringsdatum / Date of registration: 05/02/2012
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Abbas Mohammed
Examinator / Examiner: Nedelko Grbic
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: ING/School of Engineering

+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: bth2012kamal.pdf (2092 kB, öppnas i nytt fönster)