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
Dans cet article, nous étudions et proposons une méthode d'atténuation des interférences intercellulaires dans le même canal (CCI) pour les signaux pilotes utilisant des séquences Zadoff-Chu (CS-ZC) à décalage cyclique pour la liaison montante basée sur SC-FDMA sans coordination étroite du planificateur entre les cellules. Premièrement, nous étudions le problème de la grave dégradation des performances de détection créée par le manque d’orthogonalité entre les signaux pilotes sans alignement des positions des ressources de fréquence allouées entre les cellules lors de l’utilisation du schéma conventionnel de génération de séquences CS-ZC. Deuxièmement, nous identifions le principal facteur à l’origine du problème. Troisièmement, nous proposons un schéma de génération de séquence CS-ZC dépendant de la fréquence en attribuant les mêmes éléments du spectre de la séquence ZC aux sous-porteuses superposées entre les cellules afin d'atténuer le CCI inter-cellulaire des signaux pilotes sans alignement des positions des ressources de fréquence entre les cellules. . Enfin, nous confirmons la validité de la proposition en utilisant l'évaluation du BLER de données de liaison montante dans des conditions d'évanouissement par trajets multiples par simulation informatique par rapport à la méthode conventionnelle, et montrons que la proposition atteint environ 0.9 dB et 0.6 dB de meilleures performances à 10 % de BLER que la méthode conventionnelle. pour des décalages de fréquence de 1 RB et 2 RB dans une bande passante de transmission de 3 RB, respectivement.
Daichi IMAMURA
Yoshihiko OGAWA
Takashi IWAI
Tomohumi TAKATA
Katsuhiko HIRAMATSU
Kazuyuki MIYA
Koichi HOMMA
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Daichi IMAMURA, Yoshihiko OGAWA, Takashi IWAI, Tomohumi TAKATA, Katsuhiko HIRAMATSU, Kazuyuki MIYA, Koichi HOMMA, "Pilot Signal Generation Scheme Using Frequency-Dependent Cyclic Shift ZC Sequence for Inter-Cell Interference Mitigation" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 5, pp. 1680-1687, May 2009, doi: 10.1587/transcom.E92.B.1680.
Abstract: In this paper, we study and propose an inter-cell co-channel interference (CCI) mitigation method for pilot signals using cyclic shift Zadoff-Chu (CS-ZC) sequences for SC-FDMA-based uplink without tight scheduler coordination among cells. Firstly, we investigate the issue of severe detection performance degradation created by the lack of orthogonality among the pilot signals without alignment of the allocated frequency resource positions among cells when using the conventional CS-ZC sequences generation scheme. Secondly, we identify the primary factor causing the issue. Thirdly, we propose a frequency-dependent CS-ZC sequence generation scheme by allocating the same spectrum elements of the ZC sequence to the overlapped subcarriers among cells to mitigate the inter-cell CCI of the pilot signals without alignment of the frequency resource positions among cells. Finally, we confirm the validity of the proposal using uplink data BLER evaluation under a multipath fading condition by computer simulation compared to the conventional method, and show that the proposal achieves around 0.9 dB and 0.6 dB better performance at 10% BLER than the conventional method for 1 RB and 2 RBs frequency offsets in 3 RBs transmission bandwidth, respectively.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.1680/_p
Copier
@ARTICLE{e92-b_5_1680,
author={Daichi IMAMURA, Yoshihiko OGAWA, Takashi IWAI, Tomohumi TAKATA, Katsuhiko HIRAMATSU, Kazuyuki MIYA, Koichi HOMMA, },
journal={IEICE TRANSACTIONS on Communications},
title={Pilot Signal Generation Scheme Using Frequency-Dependent Cyclic Shift ZC Sequence for Inter-Cell Interference Mitigation},
year={2009},
volume={E92-B},
number={5},
pages={1680-1687},
abstract={In this paper, we study and propose an inter-cell co-channel interference (CCI) mitigation method for pilot signals using cyclic shift Zadoff-Chu (CS-ZC) sequences for SC-FDMA-based uplink without tight scheduler coordination among cells. Firstly, we investigate the issue of severe detection performance degradation created by the lack of orthogonality among the pilot signals without alignment of the allocated frequency resource positions among cells when using the conventional CS-ZC sequences generation scheme. Secondly, we identify the primary factor causing the issue. Thirdly, we propose a frequency-dependent CS-ZC sequence generation scheme by allocating the same spectrum elements of the ZC sequence to the overlapped subcarriers among cells to mitigate the inter-cell CCI of the pilot signals without alignment of the frequency resource positions among cells. Finally, we confirm the validity of the proposal using uplink data BLER evaluation under a multipath fading condition by computer simulation compared to the conventional method, and show that the proposal achieves around 0.9 dB and 0.6 dB better performance at 10% BLER than the conventional method for 1 RB and 2 RBs frequency offsets in 3 RBs transmission bandwidth, respectively.},
keywords={},
doi={10.1587/transcom.E92.B.1680},
ISSN={1745-1345},
month={May},}
Copier
TY - JOUR
TI - Pilot Signal Generation Scheme Using Frequency-Dependent Cyclic Shift ZC Sequence for Inter-Cell Interference Mitigation
T2 - IEICE TRANSACTIONS on Communications
SP - 1680
EP - 1687
AU - Daichi IMAMURA
AU - Yoshihiko OGAWA
AU - Takashi IWAI
AU - Tomohumi TAKATA
AU - Katsuhiko HIRAMATSU
AU - Kazuyuki MIYA
AU - Koichi HOMMA
PY - 2009
DO - 10.1587/transcom.E92.B.1680
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2009
AB - In this paper, we study and propose an inter-cell co-channel interference (CCI) mitigation method for pilot signals using cyclic shift Zadoff-Chu (CS-ZC) sequences for SC-FDMA-based uplink without tight scheduler coordination among cells. Firstly, we investigate the issue of severe detection performance degradation created by the lack of orthogonality among the pilot signals without alignment of the allocated frequency resource positions among cells when using the conventional CS-ZC sequences generation scheme. Secondly, we identify the primary factor causing the issue. Thirdly, we propose a frequency-dependent CS-ZC sequence generation scheme by allocating the same spectrum elements of the ZC sequence to the overlapped subcarriers among cells to mitigate the inter-cell CCI of the pilot signals without alignment of the frequency resource positions among cells. Finally, we confirm the validity of the proposal using uplink data BLER evaluation under a multipath fading condition by computer simulation compared to the conventional method, and show that the proposal achieves around 0.9 dB and 0.6 dB better performance at 10% BLER than the conventional method for 1 RB and 2 RBs frequency offsets in 3 RBs transmission bandwidth, respectively.
ER -