대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 2002년도 ITC-CSCC -3
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- Pages.1815-1818
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- 2002
A Predistorter for OFDM Systems with a Raised Cosine Pulse Shaping Filter and a High Power Amplifier
- Nam, Choong-Jin (R&D Center, Hyundai Curitel Inc.) ;
- Jang, Hee-Dong (School of Electronic Engineering, Soongsil University) ;
- Yoan Shin (School of Electronic Engineering, Soongsil University)
- 발행 : 2002.07.01
초록
In this paper, a predistorter is presented for the orthogonal frequency division multiplxing (OFDM) systems with a transmit raised cosine (RC) pulse shaping filter and a high power amplifier (HPA). By exploiting zero-intersymbol interference (ISI) nature of the RC filter, the proposed predistorter placed before the filter only utilizes memoryless nonlinearity of the HPA, not the overall nonlinearity with memory induced by a combination of the filter and HPA. The predistirtion is realized upon fixed point iteration on OFDM symbols. Simulation results show that the proposed predisorter can be effectively employed to achieve significant performance improvement.
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