Inlämning av Examensarbete / Submission of Thesis

Maarig Aregawi Hagos; Marshed Mohamed , pp. 80. ING/School of Engineering, 2012.

The work

Författare / Author: Maarig Aregawi Hagos, Marshed Mohamed
Titel / Title: Impact of Interference from Primary User on the Performance of Cognitive Radio Networks
Abstrakt Abstract:

This thesis report presents background knowledge about cognitive radio network (CRN) and investigates performance of underlay cognitive radio networks based on an adaptive power allocation policy of secondary transmitter (SU-Tx). In particular, it has been assumed that SU-Tx and primary user transmitter (PU-Tx) are equipped with a single antenna, while the corresponding receivers are equipped with multiple antennas. Additionally, SU-Tx operates under the joint constraint of its peak transmission power and outage constraint of the primary network. The probability density function (PDF) and cumulative density function (CDF) of the signal to interference and noise ratio (SINR) of SU over Rayleigh fading channel are derived. Using these two functions, a closed-form expression for the outage probability and an approximate expression for ergodic capacity of the considered system are obtained. Matlab simulation results are provided to validate the correctness of the analyses. The results show that simulation and analytical results closely match. The results show that the performance of SU increases as power of PU increases, but behaves the opposite after SU-Tx reaches its peak transmission power. Furthermore, the results reveal that as the number of antennas at the receivers (both SU and PU receivers) increases, the performance of the SU network increases.

Ämnesord / Subject: Telekommunikation - Telecommunications
Datavetenskap - Computer Science\Networks and Communications
Signalbehandling - Signal Processing
Nyckelord / Keywords: cognitive radio, ergodic capacity, outage probability, SIMO, SINR

Publication info

Dokument id / Document id: houn-8zumlq
Program:/ Programme Magisterprogram i Elektroteknik / Master of Science in Electrical Engineering
Registreringsdatum / Date of registration: 11/08/2012
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Tran Hung
Examinator / Examiner: Hans-Jürgen Zepernick
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: ING/School of Engineering

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Files & Access

Bifogad uppsats fil(er) / Files attached: bth2012 maarig.pdf (10871 kB, öppnas i nytt fönster)