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
6G 무선 통신의 극도로 높은 데이터 속도와 극도의 적용 범위 확장 요구 사항을 달성하기 위해 THz 미만(100~300GHz) 및 비지상 네트워크(NTN)의 새로운 스펙트럼은 각각 6G 후보 기술의 두 가지 거시적 추세입니다. 그러나 전력 증폭기(PA)의 비선형성은 sub-THz 및 NTN 모두에 있어 중요한 문제입니다. 따라서 높은 PE(전력 효율) 또는 낮은 PAPR(피크 대 평균 전력비) 파형 설계는 가장 중요한 6G 연구 주제 중 하나가 됩니다. 한편, 높은 SE(스펙트럼 효율)와 낮은 OOBE(대역외 방출)는 여전히 6G 파형 설계의 중요한 핵심성과지표(KPI)입니다. 단일 반송파 파형 이산 푸리에 변환 확산 직교 주파수 분할 다중화(DFT-s-OFDM)는 높은 PE로 인해 많은 연구 관심을 얻었으며 업링크 적용 범위가 제한되는 5G NR(New Radio)에서 지원되었습니다. 따라서 DFT-s-OFDM은 6G의 후보 파형으로 간주될 수 있습니다. NCP(Null Cyclic Prefix)/UW(Unique Word), FDSS(Frequency-Domain Spectral Shaping), TD-CE(Time-Domain Compression and Expansion)를 포함하여 DFT-s-OFDM 기반의 많은 향상 방식이 제안되었습니다. 등. 그러나 모든 향상 구성표와 호환되는 통합 프레임워크는 없습니다. 본 논문에서는 먼저 DFT-s-OFDM 향상을 기반으로 한 6G 후보 파형에 대한 일반적인 설명을 제공합니다. 둘째, 통합 비직교파형(uNOW)을 위한 보다 유연한 TD-CE 지원 방법을 제안하고 논의합니다. 셋째, DFT-s-OFDM 구조를 기반으로 한 통합 파형 프레임워크를 제안합니다. 통합 파형 프레임워크에서 DFT 전후의 전처리 및 후처리 모듈을 설계함으로써 세 가지 기술 방법(NCP/UW, FDSS 및 TD-CE)을 통합하여 DFT-s-OFDM의 세 가지 KPI를 개선할 수 있습니다. 높은 유연성과 동시에. 그런 다음 6G 후보 파형의 구현 복잡성을 분석하고 비교합니다. 다양한 DFT-s-OFDM 향상 방식의 성능은 링크 레벨 시뮬레이션을 통해 조사되었으며, 이는 uNOW가 모든 6G 후보 파형 중에서 최고의 PAPR 성능을 달성할 수 있음을 보여줍니다. PA 백오프를 고려할 때 uNOW는 기존 DFT-s-OFDM에 비해 124%의 처리량 이득을 달성할 수 있습니다.
Juan LIU
DOCOMO Beijing Communications Laboratories Co., Ltd.
Xiaolin HOU
DOCOMO Beijing Communications Laboratories Co., Ltd.
Wenjia LIU
DOCOMO Beijing Communications Laboratories Co., Ltd.
Lan CHEN
DOCOMO Beijing Communications Laboratories Co., Ltd.
Yoshihisa KISHIYAMA
NTT DOCOMO, INC.
Takahiro ASAI
NTT DOCOMO, INC.
The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.
부
Juan LIU, Xiaolin HOU, Wenjia LIU, Lan CHEN, Yoshihisa KISHIYAMA, Takahiro ASAI, "Unified 6G Waveform Design Based on DFT-s-OFDM Enhancements" in IEICE TRANSACTIONS on Communications,
vol. E106-B, no. 6, pp. 528-537, June 2023, doi: 10.1587/transcom.2022EBP3123.
Abstract: To achieve the extreme high data rate and extreme coverage extension requirements of 6G wireless communication, new spectrum in sub-THz (100-300GHz) and non-terrestrial network (NTN) are two of the macro trends of 6G candidate technologies, respectively. However, non-linearity of power amplifiers (PA) is a critical challenge for both sub-THz and NTN. Therefore, high power efficiency (PE) or low peak to average power ratio (PAPR) waveform design becomes one of the most significant 6G research topics. Meanwhile, high spectral efficiency (SE) and low out-of-band emission (OOBE) are still important key performance indicators (KPIs) for 6G waveform design. Single-carrier waveform discrete Fourier transform spreading orthogonal frequency division multiplexing (DFT-s-OFDM) has achieved many research interests due to its high PE, and it has been supported in 5G New Radio (NR) when uplink coverage is limited. So DFT-s-OFDM can be regarded as a candidate waveform for 6G. Many enhancement schemes based on DFT-s-OFDM have been proposed, including null cyclic prefix (NCP)/unique word (UW), frequency-domain spectral shaping (FDSS), and time-domain compression and expansion (TD-CE), etc. However, there is no unified framework to be compatible with all the enhancement schemes. This paper firstly provides a general description of the 6G candidate waveforms based on DFT-s-OFDM enhancement. Secondly, the more flexible TD-CE supporting methods for unified non-orthogonal waveform (uNOW) are proposed and discussed. Thirdly, a unified waveform framework based on DFT-s-OFDM structure is proposed. By designing the pre-processing and post-processing modules before and after DFT in the unified waveform framework, the three technical methods (NCP/UW, FDSS, and TD-CE) can be integrated to improve three KPIs of DFT-s-OFDM simultaneously with high flexibility. Then the implementation complexity of the 6G candidate waveforms are analyzed and compared. Performance of different DFT-s-OFDM enhancement schemes is investigated by link level simulation, which reveals that uNOW can achieve the best PAPR performance among all the 6G candidate waveforms. When considering PA back-off, uNOW can achieve 124% throughput gain compared to traditional DFT-s-OFDM.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2022EBP3123/_p
부
@ARTICLE{e106-b_6_528,
author={Juan LIU, Xiaolin HOU, Wenjia LIU, Lan CHEN, Yoshihisa KISHIYAMA, Takahiro ASAI, },
journal={IEICE TRANSACTIONS on Communications},
title={Unified 6G Waveform Design Based on DFT-s-OFDM Enhancements},
year={2023},
volume={E106-B},
number={6},
pages={528-537},
abstract={To achieve the extreme high data rate and extreme coverage extension requirements of 6G wireless communication, new spectrum in sub-THz (100-300GHz) and non-terrestrial network (NTN) are two of the macro trends of 6G candidate technologies, respectively. However, non-linearity of power amplifiers (PA) is a critical challenge for both sub-THz and NTN. Therefore, high power efficiency (PE) or low peak to average power ratio (PAPR) waveform design becomes one of the most significant 6G research topics. Meanwhile, high spectral efficiency (SE) and low out-of-band emission (OOBE) are still important key performance indicators (KPIs) for 6G waveform design. Single-carrier waveform discrete Fourier transform spreading orthogonal frequency division multiplexing (DFT-s-OFDM) has achieved many research interests due to its high PE, and it has been supported in 5G New Radio (NR) when uplink coverage is limited. So DFT-s-OFDM can be regarded as a candidate waveform for 6G. Many enhancement schemes based on DFT-s-OFDM have been proposed, including null cyclic prefix (NCP)/unique word (UW), frequency-domain spectral shaping (FDSS), and time-domain compression and expansion (TD-CE), etc. However, there is no unified framework to be compatible with all the enhancement schemes. This paper firstly provides a general description of the 6G candidate waveforms based on DFT-s-OFDM enhancement. Secondly, the more flexible TD-CE supporting methods for unified non-orthogonal waveform (uNOW) are proposed and discussed. Thirdly, a unified waveform framework based on DFT-s-OFDM structure is proposed. By designing the pre-processing and post-processing modules before and after DFT in the unified waveform framework, the three technical methods (NCP/UW, FDSS, and TD-CE) can be integrated to improve three KPIs of DFT-s-OFDM simultaneously with high flexibility. Then the implementation complexity of the 6G candidate waveforms are analyzed and compared. Performance of different DFT-s-OFDM enhancement schemes is investigated by link level simulation, which reveals that uNOW can achieve the best PAPR performance among all the 6G candidate waveforms. When considering PA back-off, uNOW can achieve 124% throughput gain compared to traditional DFT-s-OFDM.},
keywords={},
doi={10.1587/transcom.2022EBP3123},
ISSN={1745-1345},
month={June},}
부
TY - JOUR
TI - Unified 6G Waveform Design Based on DFT-s-OFDM Enhancements
T2 - IEICE TRANSACTIONS on Communications
SP - 528
EP - 537
AU - Juan LIU
AU - Xiaolin HOU
AU - Wenjia LIU
AU - Lan CHEN
AU - Yoshihisa KISHIYAMA
AU - Takahiro ASAI
PY - 2023
DO - 10.1587/transcom.2022EBP3123
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E106-B
IS - 6
JA - IEICE TRANSACTIONS on Communications
Y1 - June 2023
AB - To achieve the extreme high data rate and extreme coverage extension requirements of 6G wireless communication, new spectrum in sub-THz (100-300GHz) and non-terrestrial network (NTN) are two of the macro trends of 6G candidate technologies, respectively. However, non-linearity of power amplifiers (PA) is a critical challenge for both sub-THz and NTN. Therefore, high power efficiency (PE) or low peak to average power ratio (PAPR) waveform design becomes one of the most significant 6G research topics. Meanwhile, high spectral efficiency (SE) and low out-of-band emission (OOBE) are still important key performance indicators (KPIs) for 6G waveform design. Single-carrier waveform discrete Fourier transform spreading orthogonal frequency division multiplexing (DFT-s-OFDM) has achieved many research interests due to its high PE, and it has been supported in 5G New Radio (NR) when uplink coverage is limited. So DFT-s-OFDM can be regarded as a candidate waveform for 6G. Many enhancement schemes based on DFT-s-OFDM have been proposed, including null cyclic prefix (NCP)/unique word (UW), frequency-domain spectral shaping (FDSS), and time-domain compression and expansion (TD-CE), etc. However, there is no unified framework to be compatible with all the enhancement schemes. This paper firstly provides a general description of the 6G candidate waveforms based on DFT-s-OFDM enhancement. Secondly, the more flexible TD-CE supporting methods for unified non-orthogonal waveform (uNOW) are proposed and discussed. Thirdly, a unified waveform framework based on DFT-s-OFDM structure is proposed. By designing the pre-processing and post-processing modules before and after DFT in the unified waveform framework, the three technical methods (NCP/UW, FDSS, and TD-CE) can be integrated to improve three KPIs of DFT-s-OFDM simultaneously with high flexibility. Then the implementation complexity of the 6G candidate waveforms are analyzed and compared. Performance of different DFT-s-OFDM enhancement schemes is investigated by link level simulation, which reveals that uNOW can achieve the best PAPR performance among all the 6G candidate waveforms. When considering PA back-off, uNOW can achieve 124% throughput gain compared to traditional DFT-s-OFDM.
ER -