In this thesis, two signal-to-noise-ratio (SNR) estimators are analyzed for orthogonal frequency division multiplexing (OFDM) systems with imperfect
synchronization. The two SNR estimators under investigation are the maximum likelihood estimator (MLE) and the second- and fourth-order moments estimator (MME). Mathematical analysis shows that the performance of MME is not affected by the advanced timing offset while a fixed bias of MLE is induced. Mathematical analysis also shows that the same frequency offset induces different bias for the two estimators under investigation. Finally, a novel carrier frequency offset and timing offset tracking scheme based on SNR estimation is proposed in this thesis.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0827107-172118 |
| Date | 27 August 2007 |
| Creators | Chang, Chih-chao |
| Contributors | Ding-Bing Lin, Yuh-Ren Tsai, Chih-Peng Li, Jyh-Horng Wen, Chin-Liang Wang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0827107-172118 |
| Rights | campus_withheld, Copyright information available at source archive |
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