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| Paper: | SPTM-P8.11 |
| Session: | Adaptive Filters II |
| Time: | Thursday, May 20, 13:00 - 15:00 |
| Presentation: |
Poster |
| Topic: |
Signal Processing Theory and Methods: Adaptive Systems & Filtering |
| Title: |
TIME-DOMAIN ADAPTIVE PREDISTORTION FOR NONLINEAR AMPLIFIERS |
| Authors: |
Yuanming Ding; Keio University | | |
| | Akira Sano; Keio University | | |
| Abstract: |
This paper is concerned with a new time-domain adaptive predistortion scheme for compensating nonlinearity of high power amplifiers (HPA) in OFDM systems. A complex Wiener-Hammerstein model (WHM) is adopted to describe the input-output relationship of unknown HPA with linear dynamics, and a power series model with memory (PSMWM) is proposed to approximate the HPA expressed by WHM. By using the PSMWM, the compensation input to HPA is calculated in a real-time manner so that the linearization from the predistorter input to the HPA output can be attained even if the nonlinear input-output relation of HPA is uncertain and changeable. The effectiveness of the proposed adaptive compensation scheme is validated by numerical simulation for 64QAM--OFDM systems. |
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