Inlämning av Examensarbete / Submission of Thesis

Ahmer Ali Bajwa; Junaid Anwar Awan , pp. 74. TEK/avd. för signalbehandling, 2008.

The work

Författare / Author: Ahmer Ali Bajwa, Junaid Anwar Awan,
Titel / Title: Performance study of IEEE 802.16d (Fixed WiMAX) Physical layer with Adaptive Antenna System
Abstrakt Abstract:

In this thesis work, WiMAX (IEEE 802.16d) PHY layer with underlying OFDM technology and an optional feature called Adaptive Antenna System has been considered. The SUI-3 channel model (Rician fading) is used for creating fading phenomena. An Adaptive Antenna System has been deployed at the receiver module to reduce the fading effects caused by SUI-3 channel model. Adaptive Antenna Systems (AAS) uses different beamforming techniques to focus the wireless beam between the base station and the subscriber station. In this thesis, the transmitter (SS) and receiver (BS) are fixed and AAS installed at the receiver is used to direct the main beam towards the desired LOS signal and nulls to the multipath signals. Pre-FFT beamformer based on Least Mean Square (LMS) algorithm is used. Different aspects of the complete system model were investigated such as adaptive modulation, angle of arrival of the incoming signals and number of array elements. It has been demonstrated through MATLAB simulations that the performance of the system significantly improves by AAS, where beamforming is implemented in the direction of desired user. The performance of the system further increases by increasing the number of antennas at receiver.

Ämnesord / Subject: Telekommunikation - Telecommunications
Signalbehandling - Signal Processing
Nyckelord / Keywords: WiMAX(IEEE 802.16d), OFDM, Smart Antennas, AAS, LMS, Pre-FFT beamformer, SUI channel, Rician Fading, BER.

Publication info

Dokument id / Document id:
Program:/ Programme Magisterprogram i Elektroteknik / Master of Science in Electrical Engineering
Registreringsdatum / Date of registration: 10/15/2008
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Dr. Jörgen Nordberg
Examinator / Examiner: Dr. Jörgen Nordberg
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: TEK/avd. för signalbehandling
S-372 25 Ronneby
+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: ahm_jun_thesisreport.pdf (1700 kB, öppnas i nytt fönster)