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http://dx.doi.org/10.6109/jkiice.2007.11.8.1589

A Study on Reducing PAPR of OFDM Transmit System by Clipping Structural Improvement  

Kim, Wan-Tae (한국항공대학교 대학원 정보통신 공학과)
Cho, Sung-Joon (한국항공대학교 대학원 정보통신 공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.11, no.8, 2007 , pp. 1589-1595 More about this Journal
Abstract
Recently many communication systems ate adapting the OFDM(Orthogonal Frequency Division Multiplexing) for multimedia data services. However, OFDM has some problems that PAPR is increased when sub-carries are summed up with same phases. This problem causes severe signal distortions while the signal is passing through non-linear system such as power amplifier resulting in performance degradation of transmission system. In this paper, we use IF-Clipping method to solve PAPR problem and the signal distortion caused by clipping is limited by use of SAW (Surface Acoustic Wave) filter and power amplifier(TWTA). And we derive the optimal parameter(PAPR, Backoff) values to meet the spectrum mask of WiBro system.
Keywords
OFDM; Clipping; PAPR; SAW Filter; TWTA;
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