In this thesis, the superimposed training scheme is applied to the orthogonal frequency division multiplexing (OFDM) systems. To optimize power amplifier efficiency, the optimal value of pilot power allocation is derived to maximize data power. Peak-to-average power ratio (PAPR) is one of the major drawbacks for OFDM systems. A large PAPR will push the power amplifier into the saturation area, leading to nonlinear distortion, and reduce power efficiency. By using the superimposed training schemes, the system can not only improve the bandwidth efficiency, but also reduce the PAPR. In this thesis, the relation between PAPR and power efficiency is analyzed. In addition, the close form formula is derived for determining the pilot power allocation so that data power is maximized.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0823106-164713 |
| Date | 23 August 2006 |
| Creators | Lu, Hung-Yi |
| Contributors | Tsang-Yi Wang, Tsung-Hsien Liu, Chih-Peng Li, Yung-Fang Chen, Der-Feng Tseng |
| 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-0823106-164713 |
| Rights | off_campus_withheld, Copyright information available at source archive |
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