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Turbo coded OFDM with a novel synchronization technique for broadband wireless applications

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Turbo coded OFDM with a novel synchronization technique for broadband wireless applications

Liu, Jinglei (2002) Turbo coded OFDM with a novel synchronization technique for broadband wireless applications. Masters thesis, Concordia University.

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Abstract

In this thesis, an orthogonal frequency division multiplexing (OFDM) system, featuring a novel bandwidth efficient synchronization technique robust to multipath propagation, is presented and analyzed. The timing offset and frequency errors due to the transmission over a wireless multipath fading channel can result in rapid bit error rate degradation in OFDM systems. The idea of the proposed simple and efficient synchronization technique is to reduce this degradation by designing a synchronizer with a smaller error variance and also less overhead. This enables us to strengthen the robustness of OFDM to severe multipath propagations by successfully removing the cyclic prefix (Inter Symbol Interference free) and maintaining the orthogonality between all the subcarriers (Inter Channel Interference free). Furthermore, the thesis focuses on the application of diverse channel coding for the coded orthogonal frequency division multiplexing (COFDM). The performances of the COMM based on Turbo Convolutional code (TCC) and Turbo Block code (TBC) are analyzed and compared. This work also includes channel estimation, which is very important for coherent demodulation in OFDM.

Divisions:Concordia University > Faculty of Engineering and Computer Science > Electrical and Computer Engineering
Item Type:Thesis (Masters)
Authors:Liu, Jinglei
Pagination:xi, 91 leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:Theses (M.A.Sc.)
Program:Electrical and Computer Engineering
Date:2002
Thesis Supervisor(s):Soleymani, Mohammad Reza
ID Code:1873
Deposited By:Concordia University Libraries
Deposited On:27 Aug 2009 13:23
Last Modified:08 Dec 2010 10:23
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