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.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0114110-171220 |
| Date | 14 January 2010 |
| Creators | Lin, Yen-lin |
| Contributors | Ming-Der Shieh, Ju-Ya Chen, Ching-Piao Hung, Jieh-Chian Wu, Jih-ching Chiu |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0114110-171220 |
| Rights | not_available, Copyright information available at source archive |
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