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A Study on Channel Estimation of OFDM Systems

A blind channel estimation based on subspace method for orthogonal frequency division multiplexing (OFDM) systems is proposed in this thesis. Conjugate symmetric property of the OFDM symbols in the frequency-domain, which will result real time-domain symbol, is used in the proposed method to build the noise subspace. When the performance of the proposed method is compared with that of conventional method using virtual carriers, more OFDM symbols are needed in the conventional method than those needed in the proposed method. In addition, the computational complexity of the conventional method is also larger than that of the proposed method. Although the proposed method has better performance and less computational complexity compared with the conventional method, it would lose half of the transmission data rate. From the simulation results, our proposed method outperforms the conventional method.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0114110-171220
Date14 January 2010
CreatorsLin, Yen-lin
ContributorsMing-Der Shieh, Ju-Ya Chen, Ching-Piao Hung, Jieh-Chian Wu, Jih-ching Chiu
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-0114110-171220
Rightsnot_available, Copyright information available at source archive

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