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A Modified SLM Scheme with Low Complexity for PAPR Reduction of OFDM Systems  

Heo, Seok-Joong (서울대학교 전기.컴퓨터공학부 부호 및 암호 연구실 및 뉴미디어 통신연구소)
Noh, Hyung-Suk (서울대학교 전기.컴퓨터공학부 부호 및 암호 연구실 및 뉴미디어 통신연구소)
No, Jong-Seon (서울대학교 전기.컴퓨터공학부 부호 및 암호 연구실 및 뉴미디어 통신연구소)
Shin, Dong-Joon (한양대학교 전자.전기.컴퓨터공학부 부호 및 통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.11C, 2007 , pp. 1087-1094 More about this Journal
Abstract
In this paper, we propose a new peak-to-average power ratio (PAPR) reduction scheme of orthogonal frequency division multiplexing (OFDM) system, called a modified selected mapping (SLM) scheme, which considerably reduces the computational complexity with keeping the similar PAPR reduction performance compared with the conventional SLM scheme. The proposed scheme is analytically and numerically evaluated for the OFDM system specified in the IEEE 802.16 standard. For the OFDM system with 2048 subcarriers, the proposed scheme with 4 binary phase sequences can reduce the complex multiplications by 63.5% with the similar PAPR reduction compared with the SLM scheme with 16 binary phase sequences.
Keywords
Orthogonal frequency division multiplexing (OFDM); Peak-to-average power ratio (PAPR); Selected mapping (SLM); Low computational complexity;
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