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SLM‐based PAPR reduction method using partial data circulation and side information insertion in OFDM systems
Author(s) -
Wen JyhHorng,
Lee ShuHong,
Cheng ChuHsuan
Publication year - 2009
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.960
Subject(s) - orthogonal frequency division multiplexing , computer science , algorithm , hamming distance , hamming code , reduction (mathematics) , sequence (biology) , code (set theory) , bandwidth (computing) , spectral efficiency , set (abstract data type) , electronic engineering , telecommunications , mathematics , channel (broadcasting) , block code , decoding methods , geometry , biology , engineering , genetics , programming language
In this paper, two selected mapping (SLM)‐based schemes are proposed to reduce the peak‐to‐average power ratio (PAPR) in the orthogonal frequency division multiplexing (OFDM) systems. One is SLM‐based partial data circulation (PDC) scheme. The other is SLM‐based PDC with hamming coded side information (SI) scheme. In the PDC scheme, the partial samples within the data sequence are scrambled by circularly shifting to obtain a set of candidate sequences and, then, each sequence is combined with the corresponding SI to form the candidate OFDM symbol. With the selection of the candidate OFDM symbols with the lowest PAPR, the PAPR of the transmitted signal could be greatly reduced. In the other scheme, hamming code is used to protect the SI to improve the system performance. Simulation results show that the proposed method could reduce PAPR and it has a better bandwidth efficiency and less modules of inverse fast Fourier transform than that with the SLM‐based dummy sequence insertion scheme. Copyright © 2008 John Wiley & Sons, Ltd.