제어로봇시스템학회:학술대회논문집

제어로봇시스템학회 (Institute of Control, Robotics and Systems)
권호 표지

Adaptive Predistortion Compensation for Nonlinearity of High Power Amplifiers

  • Ding, Yuanming (Department of System Design Engineering, Keio University) ;
  • Ohmori, Hiromitsu (Department of System Design Engineering, Keio University) ;
  • Sano, Akira (Department of System Design Engineering, Keio University)
  • 발행 : 2003.10.22
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초록

In this paper, an adaptive predistortion scheme is proposed to compensate nonlinear distortions caused by high power amplifiers (HPA) in OFDM systems. A complex Wiener-Hammerstein model (WHM) is used to describe input-output relationship of HPA with linear dynamics. The predistorter is directly identified by complex power series model with memory, which is an approximate inverse of the HPA expressed by the WHM. The effectiveness of the proposed adaptive compensation scheme is validated by numerical simulation for 64QAM-OFDM systems.

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