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
조회수
103
5G 이상에서는 mMTC(Massive Machine Type Communication) 시스템과 같은 다양한 완전히 새로운 시스템이 지원됩니다. 각 mMTC 장치는 매우 좁은 대역폭을 차지하지만 예상되는 엄청난 수의 장치는 광범위한 트래픽을 생성하고 막대한 스펙트럼 리소스를 소비합니다. 따라서 기존 LTE(Long Term Evolution) 시스템에서 확보하고 있지만 사용하지 않는 보호 대역(Guard Band) 등 부분 스펙트럼 자원을 적극적으로 모아 활용하는 것이 필요하다. Guard Band는 원래 CP-OFDM(Cyclic Prefix-Based Orthogonal Frequency Division Multiplexing)에서 연속된 심볼 간의 불연속으로 인해 발생하는 높은 OOBE(High Out-of-Band Emission)에 대한 여유와 높은 OOBE를 가능하게 하는 새로운 파형에 대한 마진으로 확보됩니다. 협대역 통신을 주파수 간격에 효율적으로 할당하기 위해 억제가 널리 연구되어 왔습니다. 시간 영역 윈도우잉은 복잡도가 낮고 OOBE를 줄이기 위한 잘 알려진 신호 처리 기술이며, CP 길이를 초과하는 긴 전환 기간을 갖는 UTW-OFDM(Universal Time-Domain Windowed OFDM)이 WLAN 기반 시스템에서 그 능력을 입증했습니다. 본 논문에서는 LTE 다운링크 시스템에 UTW-OFDM을 적용하고 3GPP에서 정의한 채널 모델 하에서 성능을 종합적으로 평가합니다. 구체적으로 컴퓨터 시뮬레이션을 통해 OOBE 감소 및 차단 오류율(BLER)을 평가하고, 통신 품질을 저하시키지 않으면서 OOBE를 어디까지 줄일 수 있는지 규명합니다. 또한, 필요한 곱셈 수를 계산하여 제안된 UTW-OFDM, 기존 CP-OFDM 및 UF-OFDM(Universal Filtered-OFDM)의 구현 복잡도를 추정한다. 이러한 평가 및 추정 결과는 제안된 UTW-OFDM이 5G 이상에 적용 가능한 실용적인 새로운 파형임을 입증합니다.
Keiichi MIZUTANI
Kyoto University
Takeshi MATSUMURA
Kyoto University
Hiroshi HARADA
Kyoto University
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부
Keiichi MIZUTANI, Takeshi MATSUMURA, Hiroshi HARADA, "Comprehensive Performance Evaluation of Universal Time-Domain Windowed OFDM-Based LTE Downlink System" in IEICE TRANSACTIONS on Communications,
vol. E102-B, no. 8, pp. 1728-1740, August 2019, doi: 10.1587/transcom.2018EBP3242.
Abstract: A variety of all-new systems such as a massive machine type communication (mMTC) system will be supported in 5G and beyond. Although each mMTC device occupies quite narrow bandwidth, the massive number of devices expected will generate a vast array of traffic and consume enormous spectrum resources. Therefore, it is necessary to proactively gather up and exploit fractional spectrum resources including guard bands that are secured but unused by the existing Long Term Evolution (LTE) systems. The guard band is originally secured as a margin for high out-of-band emission (OOBE) caused by the discontinuity between successive symbols in the cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM), and new-waveforms enabling high OOBE suppression have been widely researched to efficiently allocate narrowband communication to the frequency gap. Time-domain windowing is a well-known signal processing technique for reducing OOBE with low complexity and a universal time-domain windowed OFDM (UTW-OFDM) with a long transition duration exceeding the CP length has demonstrated its ability in WLAN-based systems. In this paper, we apply UTW-OFDM to the LTE downlink system and comprehensively evaluate its performance under the channel models defined by 3GPP. Specifically, we evaluate OOBE reduction and block error rate (BLER) by computer simulation and clarify how far OOBE can be reduced without degrading communication quality. Furthermore, we estimate the implementation complexity of the proposed UTW-OFDM, the conventional CP-OFDM, and the universal filtered-OFDM (UF-OFDM) by calculating the number of required multiplications. These evaluation and estimation results demonstrate that the proposed UTW-OFDM is a practical new-waveform applicable to the 5G and beyond.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2018EBP3242/_p
부
@ARTICLE{e102-b_8_1728,
author={Keiichi MIZUTANI, Takeshi MATSUMURA, Hiroshi HARADA, },
journal={IEICE TRANSACTIONS on Communications},
title={Comprehensive Performance Evaluation of Universal Time-Domain Windowed OFDM-Based LTE Downlink System},
year={2019},
volume={E102-B},
number={8},
pages={1728-1740},
abstract={A variety of all-new systems such as a massive machine type communication (mMTC) system will be supported in 5G and beyond. Although each mMTC device occupies quite narrow bandwidth, the massive number of devices expected will generate a vast array of traffic and consume enormous spectrum resources. Therefore, it is necessary to proactively gather up and exploit fractional spectrum resources including guard bands that are secured but unused by the existing Long Term Evolution (LTE) systems. The guard band is originally secured as a margin for high out-of-band emission (OOBE) caused by the discontinuity between successive symbols in the cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM), and new-waveforms enabling high OOBE suppression have been widely researched to efficiently allocate narrowband communication to the frequency gap. Time-domain windowing is a well-known signal processing technique for reducing OOBE with low complexity and a universal time-domain windowed OFDM (UTW-OFDM) with a long transition duration exceeding the CP length has demonstrated its ability in WLAN-based systems. In this paper, we apply UTW-OFDM to the LTE downlink system and comprehensively evaluate its performance under the channel models defined by 3GPP. Specifically, we evaluate OOBE reduction and block error rate (BLER) by computer simulation and clarify how far OOBE can be reduced without degrading communication quality. Furthermore, we estimate the implementation complexity of the proposed UTW-OFDM, the conventional CP-OFDM, and the universal filtered-OFDM (UF-OFDM) by calculating the number of required multiplications. These evaluation and estimation results demonstrate that the proposed UTW-OFDM is a practical new-waveform applicable to the 5G and beyond.},
keywords={},
doi={10.1587/transcom.2018EBP3242},
ISSN={1745-1345},
month={August},}
부
TY - JOUR
TI - Comprehensive Performance Evaluation of Universal Time-Domain Windowed OFDM-Based LTE Downlink System
T2 - IEICE TRANSACTIONS on Communications
SP - 1728
EP - 1740
AU - Keiichi MIZUTANI
AU - Takeshi MATSUMURA
AU - Hiroshi HARADA
PY - 2019
DO - 10.1587/transcom.2018EBP3242
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E102-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2019
AB - A variety of all-new systems such as a massive machine type communication (mMTC) system will be supported in 5G and beyond. Although each mMTC device occupies quite narrow bandwidth, the massive number of devices expected will generate a vast array of traffic and consume enormous spectrum resources. Therefore, it is necessary to proactively gather up and exploit fractional spectrum resources including guard bands that are secured but unused by the existing Long Term Evolution (LTE) systems. The guard band is originally secured as a margin for high out-of-band emission (OOBE) caused by the discontinuity between successive symbols in the cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM), and new-waveforms enabling high OOBE suppression have been widely researched to efficiently allocate narrowband communication to the frequency gap. Time-domain windowing is a well-known signal processing technique for reducing OOBE with low complexity and a universal time-domain windowed OFDM (UTW-OFDM) with a long transition duration exceeding the CP length has demonstrated its ability in WLAN-based systems. In this paper, we apply UTW-OFDM to the LTE downlink system and comprehensively evaluate its performance under the channel models defined by 3GPP. Specifically, we evaluate OOBE reduction and block error rate (BLER) by computer simulation and clarify how far OOBE can be reduced without degrading communication quality. Furthermore, we estimate the implementation complexity of the proposed UTW-OFDM, the conventional CP-OFDM, and the universal filtered-OFDM (UF-OFDM) by calculating the number of required multiplications. These evaluation and estimation results demonstrate that the proposed UTW-OFDM is a practical new-waveform applicable to the 5G and beyond.
ER -