| Presentation | 2009-03-04 Parameter Optimization Speed Improvement for Multi-carrier Signals in An Adaptive Predistortion Method Based on Orthogonal Polynomial Expansion Isamu KANEKO, Osamu MUTA, Yoshihiko AKAIWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Adaptive predistorter is an effective technique to compensate nonlinear distortion in power amplifier. As a method to improve the parameter convergence speed in the predistorter, a series expansion technique with orthogonal polynomials has been proposed. In this paper, we propose a method to improve parameter optimization speed by individually adjusting the step size corresponding to each orthogonal polynomial. Computer simulation results for OFDM and W-CDMA signals show that the proposed method is effective in improving the parameter optimization speed of the predistorter for a power amplifier affected by memory effect. In addition, we also show that power efficiency is further improved by combining the predistortion with peak-to-average power ratio reduction technique for OFDM signal. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Adaptive predistorter / Orthogonal polynomial expansion / Nonlinear distortion compensation / Step size / Memory effect / OFDM / PAPR reduction |
| Paper # | RCS2008-212 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2009/2/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Parameter Optimization Speed Improvement for Multi-carrier Signals in An Adaptive Predistortion Method Based on Orthogonal Polynomial Expansion |
| Sub Title (in English) | |
| Keyword(1) | Adaptive predistorter |
| Keyword(2) | Orthogonal polynomial expansion |
| Keyword(3) | Nonlinear distortion compensation |
| Keyword(4) | Step size |
| Keyword(5) | Memory effect |
| Keyword(6) | OFDM |
| Keyword(7) | PAPR reduction |
| 1st Author's Name | Isamu KANEKO |
| 1st Author's Affiliation | Faculty of Information Science and Electrical Engineering, Kyushu University Kyushu University() |
| 2nd Author's Name | Osamu MUTA |
| 2nd Author's Affiliation | Faculty of Information Science and Electrical Engineering, Kyushu University Kyushu University |
| 3rd Author's Name | Yoshihiko AKAIWA |
| 3rd Author's Affiliation | Faculty of Information Science and Electrical Engineering, Kyushu University Kyushu University |
| Date | 2009-03-04 |
| Paper # | RCS2008-212 |
| Volume (vol) | vol.108 |
| Number (no) | 445 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |