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
Neste artigo, estudamos e propomos um método de mitigação de interferência co-canal entre células (CCI) para sinais piloto usando sequências de deslocamento cíclico Zadoff-Chu (CS-ZC) para uplink baseado em SC-FDMA sem coordenação rígida do agendador entre células. Primeiramente, investigamos a questão da grave degradação do desempenho de detecção criada pela falta de ortogonalidade entre os sinais piloto sem alinhamento das posições de recursos de frequência alocadas entre as células ao usar o esquema convencional de geração de sequências CS-ZC. Em segundo lugar, identificamos o principal fator que causa o problema. Em terceiro lugar, propomos um esquema de geração de sequência CS-ZC dependente de frequência, alocando os mesmos elementos do espectro da sequência ZC às subportadoras sobrepostas entre as células para mitigar o CCI intercelular dos sinais piloto sem alinhamento das posições dos recursos de frequência entre as células . Finalmente, confirmamos a validade da proposta usando avaliação BLER de dados de uplink sob uma condição de desvanecimento multipercurso por simulação computacional em comparação com o método convencional, e mostramos que a proposta atinge cerca de 0.9 dB e 0.6 dB melhor desempenho a 10% BLER do que o método convencional para deslocamentos de frequência de 1 RB e 2 RBs em largura de banda de transmissão de 3 RBs, respectivamente.
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
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@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},}
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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 -