| Presentation | 2006-11-21 Adaptive Digital Predistortion Linearizer for High Power Amplifiers M. DASHTI, A. MOHAMMADI, Jun-ichi TAKADA, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | M-QAM modulation has been considered to achieve high bandwidth efficiency for wireless communications. However, due to its envelope fluctuation, it exhibits large spectral regrowth when power amplifier (PA) operates in nonlinear region close to saturation, in this study, an adaptive predistorter (PD) algorithm, based on look-up table (LUT), is introduced to linearize PA. The algorithm is implemented for a measured Class AB HPA. Adjacent Channel Power Ratio (ACPR) is used as a criterion to evaluate the PD performance. Output spectrum with and without PD are compared for 16-QAM input signal. A nearly 20dB improvement in ACPR is obtained by using PD. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Predistortion / Power amplifier / Linearization / ACPR |
| Paper # | MW2006-134 |
| Date of Issue |
| Conference Information | |
| Committee | MW |
|---|---|
| Conference Date | 2006/11/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Microwaves (MW) |
|---|---|
| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Adaptive Digital Predistortion Linearizer for High Power Amplifiers |
| Sub Title (in English) | |
| Keyword(1) | Predistortion |
| Keyword(2) | Power amplifier |
| Keyword(3) | Linearization |
| Keyword(4) | ACPR |
| 1st Author's Name | M. DASHTI |
| 1st Author's Affiliation | Amirkabir University of Technology:Graduate School of Engineering, Tokyo Institute of Technology() |
| 2nd Author's Name | A. MOHAMMADI |
| 2nd Author's Affiliation | Amirkabir University of Technology |
| 3rd Author's Name | Jun-ichi TAKADA |
| 3rd Author's Affiliation | Graduate School of Engineering, Tokyo Institute of Technology |
| Date | 2006-11-21 |
| Paper # | MW2006-134 |
| Volume (vol) | vol.106 |
| Number (no) | 369 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |