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Joint Estimation for OFDM Timing and Carrier Frequency Offsets Using Transparent Training Sequences

In this thesis, a joint symbol timing and carrier frequency offset estimator is proposed for orthogonal frequency division multiplexing (OFDM) systems. The estimator exploits both redundancy in the cyclic prefix and pilot symbols for channel estimation. The proposed scheme includes a transparent sequence that is added to the OFDM symbol in frequency domain. Comparing with conventional methods, the proposed architecture has the advantage of better bandwidth usage since it does not require extra sub-carriers. The PAPR problem can be suppressed due to constant envelope property of the added sequence in time domain. Moreover, the optimal power allocation ratio of the transparent sequence is determined by minimizing the bit error rate of the system using simulation experiments.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0823106-164652
Date23 August 2006
CreatorsLin, Hsuan-Chih
ContributorsChih-Peng Li, Tsung-Hsien Liu, Der-Feng Tseng, Tsang-Yi Wang, Yung-Fang Chen
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0823106-164652
Rightsnot_available, Copyright information available at source archive

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