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A New SLM Method using Dummy Sequence Insertion far the PAPR Reduction of the OFDM Communication System  

이재은 (충북대학교 전자공학과 및 컴퓨터정보통신연구소)
허근재 (충북대학교 전자공학과 및 컴퓨터정보통신연구)
김상우 (충북대학교 전자공학과 및 컴퓨터정보통신연구)
유흥균 (충북대학교 전자공학과 및 컴퓨터정보통신연구소)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.15, no.4, 2004 , pp. 379-386 More about this Journal
Abstract
OFDM(orthogonal frequency division multiplexing) communications system is very attractive for the high data rate transmissionin the frequency selective fading channel. Since OFDM has high PAPR(peak-to-average power ratio), OFDM signal may be distorted by the nonlinear HPA(high power amplifier). In this paper, we propose an improved dummy sequence scheme for reducing the PAPR in OFDM communication system. This method inserts each different dummy sequence at the predefined sub-carriers fur PAPR reduction. After IFFT, the OFDM data signal with the lowest PAPR is selected to transmit. The complementary sequence is used as dummy sequence. So, it can cut down the computation time and quantity because it dose not require the peak value optimization for finding the phase rotation factor and the transmission of the side information about the rotation factor unlike the PTS method.
Keywords
OFDM; PAPR; Dummy Sequence; SLM and DSI-SLM;
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