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
O pré-codificador de escultura de espectro (SSP) é um esquema de pré-codificação para supressão de lóbulo lateral de sinais de multiplexação por divisão de frequência (OFDM). Ele pode formar entalhes espectrais profundos em frequências escolhidas e é adequado para sistemas de rádio cognitivos. No entanto, o SSP degrada a taxa de erro à medida que o número de frequências entalhadas aumenta. A pré-codificação ortogonal que melhora o SSP pode atingir tanto o entalhe de espectro quanto a taxa de erro ideal, mas sua complexidade computacional é muito alta, uma vez que a matriz do pré-codificador é grande em tamanho. Este artigo propõe uma decomposição eficaz e equivalente da matriz do pré-codificador por decomposição QR, a fim de reduzir a complexidade computacional da pré-codificação ortogonal. Experimentos numéricos mostram que o método proposto pode reduzir drasticamente a complexidade computacional sem degradação de desempenho.
Hikaru KAWASAKI
Osaka Prefecture University
Masaya OHTA
Osaka Prefecture University
Katsumi YAMASHITA
Osaka Prefecture University
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Hikaru KAWASAKI, Masaya OHTA, Katsumi YAMASHITA, "Matrix Decomposition of Precoder Matrix in Orthogonal Precoding for Sidelobe Suppression of OFDM Signals" in IEICE TRANSACTIONS on Communications,
vol. E101-B, no. 7, pp. 1716-1722, July 2018, doi: 10.1587/transcom.2017EBP3329.
Abstract: The spectrum sculpting precoder (SSP) is a precoding scheme for sidelobe suppression of frequency division multiplexing (OFDM) signals. It can form deep spectral notches at chosen frequencies and is suitable for cognitive radio systems. However, the SSP degrades the error rate as the number of notched frequencies increases. Orthogonal precoding that improves the SSP can achieve both spectrum notching and the ideal error rate, but its computational complexity is very high since the precoder matrix is large in size. This paper proposes an effective and equivalent decomposition of the precoder matrix by QR-decomposition in order to reduce the computational complexity of orthogonal precoding. Numerical experiments show that the proposed method can drastically reduce the computational complexity with no performance degradation.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2017EBP3329/_p
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@ARTICLE{e101-b_7_1716,
author={Hikaru KAWASAKI, Masaya OHTA, Katsumi YAMASHITA, },
journal={IEICE TRANSACTIONS on Communications},
title={Matrix Decomposition of Precoder Matrix in Orthogonal Precoding for Sidelobe Suppression of OFDM Signals},
year={2018},
volume={E101-B},
number={7},
pages={1716-1722},
abstract={The spectrum sculpting precoder (SSP) is a precoding scheme for sidelobe suppression of frequency division multiplexing (OFDM) signals. It can form deep spectral notches at chosen frequencies and is suitable for cognitive radio systems. However, the SSP degrades the error rate as the number of notched frequencies increases. Orthogonal precoding that improves the SSP can achieve both spectrum notching and the ideal error rate, but its computational complexity is very high since the precoder matrix is large in size. This paper proposes an effective and equivalent decomposition of the precoder matrix by QR-decomposition in order to reduce the computational complexity of orthogonal precoding. Numerical experiments show that the proposed method can drastically reduce the computational complexity with no performance degradation.},
keywords={},
doi={10.1587/transcom.2017EBP3329},
ISSN={1745-1345},
month={July},}
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TY - JOUR
TI - Matrix Decomposition of Precoder Matrix in Orthogonal Precoding for Sidelobe Suppression of OFDM Signals
T2 - IEICE TRANSACTIONS on Communications
SP - 1716
EP - 1722
AU - Hikaru KAWASAKI
AU - Masaya OHTA
AU - Katsumi YAMASHITA
PY - 2018
DO - 10.1587/transcom.2017EBP3329
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E101-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2018
AB - The spectrum sculpting precoder (SSP) is a precoding scheme for sidelobe suppression of frequency division multiplexing (OFDM) signals. It can form deep spectral notches at chosen frequencies and is suitable for cognitive radio systems. However, the SSP degrades the error rate as the number of notched frequencies increases. Orthogonal precoding that improves the SSP can achieve both spectrum notching and the ideal error rate, but its computational complexity is very high since the precoder matrix is large in size. This paper proposes an effective and equivalent decomposition of the precoder matrix by QR-decomposition in order to reduce the computational complexity of orthogonal precoding. Numerical experiments show that the proposed method can drastically reduce the computational complexity with no performance degradation.
ER -