This thesis presents a transmitter with digital baseband predistorter to improve linearity of power amplifier. The architecture adopts the look-up table predistorter base on a polar scheme, and realizes the digital processor using FPGA. The predistortion for AM/AM and AM/PM nonlinear relations in a 0.5£gm GaAs pHEMT class-AB power amplifier has been performed. One-tone, two-tone and multi-tone continuous waves generated by baseband signal are used for linearity test. The results demonstrate that the digital predistortion technique can effectively improve intermodulation distortion. With this technique, the power amplifier can operate in the higher power range to achieve a similar linearity and a higher efficiency.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0816107-183237 |
| Date | 16 August 2007 |
| Creators | Du, Jr-yung |
| Contributors | Kang-Chun Peng, Huey-Ru Chuang, Tzong-Lin Wu, Tzyy-Sheng Horng, Sheng-Fuh Chang |
| 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-0816107-183237 |
| Rights | unrestricted, Copyright information available at source archive |
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