The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Uma grande desvantagem da multiplexação por divisão de frequência ortogonal é a alta relação de potência pico-média (PAPR) do sinal de saída. Os métodos de mapeamento selecionado (SLM) e sequências de transmissão parciais (PTS) são duas técnicas promissoras para redução de PAPR. Contudo, para gerar um conjunto de sinais candidatos, estas técnicas necessitam de um banco de transformadas rápidas inversas de Fourier (IFFT's) e, portanto, requerem alta complexidade computacional. Neste artigo, propomos dois processos de conversão livres de multiplicação de baixa complexidade para substituir os IFFTs no método SLM, onde cada processo de conversão para um IFFT de N pontos envolve apenas 3N adições complexas. Usando essas conversões propostas, desenvolvemos vários novos esquemas SLM e um método combinado SLM e PTS, no qual pelo menos metade dos blocos IFFT são reduzidos. Os resultados da simulação computacional mostram que, em comparação com os métodos convencionais, estes novos esquemas têm aproximadamente o mesmo desempenho de redução de PAPR sob o mesmo número de sinais candidatos para seleção de transmissão.
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Chin-Liang WANG, Yuan OUYANG, Ming-Yen HSU, "Low-Complexity SLM and PTS Schemes for PAPR Reduction in OFDM Systems" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 7, pp. 2420-2425, July 2009, doi: 10.1587/transcom.E92.B.2420.
Abstract: One major drawback of orthogonal frequency-division multiplexing is the high peak-to-average power ratio (PAPR) of the output signal. The selected mapping (SLM) and partial transmit sequences (PTS) methods are two promising techniques for PAPR reduction. However, to generate a set of candidate signals, these techniques need a bank of inverse fast Fourier transforms (IFFT's) and thus require high computational complexity. In this paper, we propose two low-complexity multiplication-free conversion processes to replace the IFFT's in the SLM method, where each conversion process for an N-point IFFT involves only 3N complex additions. Using these proposed conversions, we develop several new SLM schemes and a combined SLM & PTS method, in which at least half of the IFFT blocks are reduced. Computer simulation results show that, compared to the conventional methods, these new schemes have approximately the same PAPR reduction performance under the same number of candidate signals for transmission selection.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.2420/_p
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@ARTICLE{e92-b_7_2420,
author={Chin-Liang WANG, Yuan OUYANG, Ming-Yen HSU, },
journal={IEICE TRANSACTIONS on Communications},
title={Low-Complexity SLM and PTS Schemes for PAPR Reduction in OFDM Systems},
year={2009},
volume={E92-B},
number={7},
pages={2420-2425},
abstract={One major drawback of orthogonal frequency-division multiplexing is the high peak-to-average power ratio (PAPR) of the output signal. The selected mapping (SLM) and partial transmit sequences (PTS) methods are two promising techniques for PAPR reduction. However, to generate a set of candidate signals, these techniques need a bank of inverse fast Fourier transforms (IFFT's) and thus require high computational complexity. In this paper, we propose two low-complexity multiplication-free conversion processes to replace the IFFT's in the SLM method, where each conversion process for an N-point IFFT involves only 3N complex additions. Using these proposed conversions, we develop several new SLM schemes and a combined SLM & PTS method, in which at least half of the IFFT blocks are reduced. Computer simulation results show that, compared to the conventional methods, these new schemes have approximately the same PAPR reduction performance under the same number of candidate signals for transmission selection.},
keywords={},
doi={10.1587/transcom.E92.B.2420},
ISSN={1745-1345},
month={July},}
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TY - JOUR
TI - Low-Complexity SLM and PTS Schemes for PAPR Reduction in OFDM Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 2420
EP - 2425
AU - Chin-Liang WANG
AU - Yuan OUYANG
AU - Ming-Yen HSU
PY - 2009
DO - 10.1587/transcom.E92.B.2420
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2009
AB - One major drawback of orthogonal frequency-division multiplexing is the high peak-to-average power ratio (PAPR) of the output signal. The selected mapping (SLM) and partial transmit sequences (PTS) methods are two promising techniques for PAPR reduction. However, to generate a set of candidate signals, these techniques need a bank of inverse fast Fourier transforms (IFFT's) and thus require high computational complexity. In this paper, we propose two low-complexity multiplication-free conversion processes to replace the IFFT's in the SLM method, where each conversion process for an N-point IFFT involves only 3N complex additions. Using these proposed conversions, we develop several new SLM schemes and a combined SLM & PTS method, in which at least half of the IFFT blocks are reduced. Computer simulation results show that, compared to the conventional methods, these new schemes have approximately the same PAPR reduction performance under the same number of candidate signals for transmission selection.
ER -