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Amplitude and Phase Variant SLM Scheme for PAPR Reduction in QAM Modulated OFDM Signals  

Jeon, Hyun-Bae (서울대학교 전기.컴퓨터공학부 및 뉴미디어통신 연구소)
Kim, Ki-Hoon (서울대학교 전기.컴퓨터공학부 및 뉴미디어통신 연구소)
No, Jong-Seon (서울대학교 전기.컴퓨터공학부 및 뉴미디어통신 연구소)
Shin, Dong-Joon (한양대학교 전자통신컴퓨터공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.2C, 2010 , pp. 203-209 More about this Journal
Abstract
In this paper, we propose a new selected mapping (SLM) scheme for reducing peak to average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals modulated with quadrature amplitude modulation (QAM), called amplitude and phase variant SLM (APSLM). Contrary to the conventional SLM which rotates the phases of QAM symbols in the frequency domain, the proposed scheme changes the magnitudes as well as the phases of QAM symbols by applying binary sequences to the binary data sequence before mapped to QAM symbols. Simulation results show that the proposed scheme has better PAPR reduction performance than the conventional SLM scheme for the QAM modulated OFDM signals, especially for the small number of subcarriers.
Keywords
Orthogonal frequency division multiplexing (OFDM); peak to average power ratio (PAPR); selected mapping (SLM);
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