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".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
조회수
120
기존 UF-DFTs-OFDM(Universal Filtered-DFT-Spread-OFDM)은 기존 CP-DFTs(CP-DFTs)에서 심볼 간 불연속성으로 인해 발생하는 OOBE(Out-of-Band Emission)를 획기적으로 개선할 수 있습니다. -OFDM). 그러나 UF-DFTs-OFDM은 GI(Guard Interval)에 해당하는 LPF(Low Pass Filter)의 긴 천이 시간으로 인해 발생하는 주파수 영역 리플로 인해 장기 지연 다중 경로 페이딩 환경에서 통신 품질이 저하됩니다. 본 논문에서는 장지연 다중경로 페이딩 환경에서도 현저히 낮은 OOBE와 높은 통신 품질을 달성하는 향상된 UF-DFTs-OFDM(eUF-DFTs-OFDM)을 제안한다. eUF-DFTs-OFDM은 제로 패딩(ZP) 또는 CP 프로세스와 결합하여 매우 짧은 길이의 LPF를 적용합니다. 그런 다음 OOBE, PAPR(peak-to-average power ratio), BLER(block error rate)의 특성을 LTE 업링크 매개변수를 사용한 컴퓨터 시뮬레이션을 통해 평가합니다. 결과적으로 eUF-DFTs-OFDM은 CP-DFTs-OFDM에 비해 채널 에지에서 OOBE를 22.5dB 개선할 수 있음을 확인했으며, ES/N0 BLER =10을 달성하기 위해-3 UF-DFTs-OFDM에 비해 QPSK 및 2.5QAM의 경우 약 16dB 정도 향상되었습니다. 64QAM의 경우 제안된 eUF-DFTs-ODFDM은 UF-DFTs-OFDM의 오류 층을 제거할 수 있습니다. 이러한 결과는 제안된 eUF-DFTs-OFDM이 장기 지연 다중 경로 환경에서도 CP-DFTs-OFDM과 동일한 수준의 통신 품질을 유지하면서 OOBE를 크게 줄일 수 있음을 나타냅니다.
Yuji MIZUTANI
Kyoto University
Hiroto KURIKI
Kyoto University
Yosuke KODAMA
Kyoto University
Keiichi MIZUTANI
Kyoto University
Takeshi MATSUMURA
Kyoto University
Hiroshi HARADA
Kyoto University
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Yuji MIZUTANI, Hiroto KURIKI, Yosuke KODAMA, Keiichi MIZUTANI, Takeshi MATSUMURA, Hiroshi HARADA, "Enhanced Universal Filtered-DFTs-OFDM for Long-Delay Multipath Environment" in IEICE TRANSACTIONS on Communications,
vol. E103-B, no. 4, pp. 467-475, April 2020, doi: 10.1587/transcom.2019EBP3044.
Abstract: The conventional universal filtered-DFT-spread-OFDM (UF-DFTs-OFDM) can drastically improve the out-of-band emission (OOBE) caused by the discontinuity between symbols in the conventional cyclic prefix-based DFTs-OFDM (CP-DFTs-OFDM). However, the UF-DFTs-OFDM degrades the communication quality in a long-delay multipath fading environment due to the frequency-domain ripple derived from the long transition time of the low pass filter (LPF) corresponding to the guard interval (GI). In this paper, we propose an enhanced UF-DFTs-OFDM (eUF-DFTs-OFDM) that achieves significantly low OOBE and high communication quality even in a long-delay multipath fading environment. The eUF-DFTs-OFDM applies an LPF with quite short length in combination with the zero padding (ZP) or the CP process. Then, the characteristics of the OOBE, peak-to-average power ratio (PAPR), and block error rate (BLER) are evaluated by computer simulation with the LTE uplink parameters. The result confirms that the eUF-DFTs-OFDM can improve the OOBE by 22.5dB at the channel-edge compared to the CP-DFTs-OFDM, and also improve the ES/N0 to achieve BLER =10-3 by about 2.5dB for QPSK and 16QAM compared to the UF-DFTs-OFDM. For 64QAM, the proposed eUF-DFTs-ODFDM can eliminate the error floor of the UF-DFTs-OFDM. These results indicate that the proposed eUF-DFTs-OFDM can significantly reduce the OOBE while maintaining the same level of communication quality as the CP-DFTs-OFDM even in long-delay multipath environment.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2019EBP3044/_p
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@ARTICLE{e103-b_4_467,
author={Yuji MIZUTANI, Hiroto KURIKI, Yosuke KODAMA, Keiichi MIZUTANI, Takeshi MATSUMURA, Hiroshi HARADA, },
journal={IEICE TRANSACTIONS on Communications},
title={Enhanced Universal Filtered-DFTs-OFDM for Long-Delay Multipath Environment},
year={2020},
volume={E103-B},
number={4},
pages={467-475},
abstract={The conventional universal filtered-DFT-spread-OFDM (UF-DFTs-OFDM) can drastically improve the out-of-band emission (OOBE) caused by the discontinuity between symbols in the conventional cyclic prefix-based DFTs-OFDM (CP-DFTs-OFDM). However, the UF-DFTs-OFDM degrades the communication quality in a long-delay multipath fading environment due to the frequency-domain ripple derived from the long transition time of the low pass filter (LPF) corresponding to the guard interval (GI). In this paper, we propose an enhanced UF-DFTs-OFDM (eUF-DFTs-OFDM) that achieves significantly low OOBE and high communication quality even in a long-delay multipath fading environment. The eUF-DFTs-OFDM applies an LPF with quite short length in combination with the zero padding (ZP) or the CP process. Then, the characteristics of the OOBE, peak-to-average power ratio (PAPR), and block error rate (BLER) are evaluated by computer simulation with the LTE uplink parameters. The result confirms that the eUF-DFTs-OFDM can improve the OOBE by 22.5dB at the channel-edge compared to the CP-DFTs-OFDM, and also improve the ES/N0 to achieve BLER =10-3 by about 2.5dB for QPSK and 16QAM compared to the UF-DFTs-OFDM. For 64QAM, the proposed eUF-DFTs-ODFDM can eliminate the error floor of the UF-DFTs-OFDM. These results indicate that the proposed eUF-DFTs-OFDM can significantly reduce the OOBE while maintaining the same level of communication quality as the CP-DFTs-OFDM even in long-delay multipath environment.},
keywords={},
doi={10.1587/transcom.2019EBP3044},
ISSN={1745-1345},
month={April},}
부
TY - JOUR
TI - Enhanced Universal Filtered-DFTs-OFDM for Long-Delay Multipath Environment
T2 - IEICE TRANSACTIONS on Communications
SP - 467
EP - 475
AU - Yuji MIZUTANI
AU - Hiroto KURIKI
AU - Yosuke KODAMA
AU - Keiichi MIZUTANI
AU - Takeshi MATSUMURA
AU - Hiroshi HARADA
PY - 2020
DO - 10.1587/transcom.2019EBP3044
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E103-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2020
AB - The conventional universal filtered-DFT-spread-OFDM (UF-DFTs-OFDM) can drastically improve the out-of-band emission (OOBE) caused by the discontinuity between symbols in the conventional cyclic prefix-based DFTs-OFDM (CP-DFTs-OFDM). However, the UF-DFTs-OFDM degrades the communication quality in a long-delay multipath fading environment due to the frequency-domain ripple derived from the long transition time of the low pass filter (LPF) corresponding to the guard interval (GI). In this paper, we propose an enhanced UF-DFTs-OFDM (eUF-DFTs-OFDM) that achieves significantly low OOBE and high communication quality even in a long-delay multipath fading environment. The eUF-DFTs-OFDM applies an LPF with quite short length in combination with the zero padding (ZP) or the CP process. Then, the characteristics of the OOBE, peak-to-average power ratio (PAPR), and block error rate (BLER) are evaluated by computer simulation with the LTE uplink parameters. The result confirms that the eUF-DFTs-OFDM can improve the OOBE by 22.5dB at the channel-edge compared to the CP-DFTs-OFDM, and also improve the ES/N0 to achieve BLER =10-3 by about 2.5dB for QPSK and 16QAM compared to the UF-DFTs-OFDM. For 64QAM, the proposed eUF-DFTs-ODFDM can eliminate the error floor of the UF-DFTs-OFDM. These results indicate that the proposed eUF-DFTs-OFDM can significantly reduce the OOBE while maintaining the same level of communication quality as the CP-DFTs-OFDM even in long-delay multipath environment.
ER -