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
전력 스펙트럼 밀도 특성의 관점에서 실제 시스템에 널리 채택된 직교 주파수 분할 다중화(OFDM) 신호의 스펙트럼 효율에 대해 논의합니다. 기존의 OFDM은 펄스 성형 필터를 사용하지 않기 때문에 특히 부반송파 수가 적은 경우 OOB(out-of-band) 스펙트럼을 무시할 수 없습니다. 따라서 실제로 연속적인 OFDM 심볼의 전환을 부드럽게 하여 OOB 방출을 완화하기 위해 윈도윙이 적용되지만 그 효과는 잘 조사되지 않았습니다. 또한 OFDM 신호는 높은 PAPR(peak-to-average power ratio)과 관련된 비선형 왜곡으로 인해 OOB 방사를 유발합니다. 우리는 문헌에서 개발된 이론적 결과를 기반으로 전력 증폭기 비선형성이 스펙트럼 효율에 어떤 영향을 미치는지 조사합니다.
Hideki OCHIAI
Yokohama National University
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부
Hideki OCHIAI, "On Spectral Efficiency of OFDM Signals Based on Windowing" in IEICE TRANSACTIONS on Fundamentals,
vol. E106-A, no. 5, pp. 752-764, May 2023, doi: 10.1587/transfun.2022WBI0002.
Abstract: We discuss the spectral efficiency of orthogonal frequency-division multiplexing (OFDM) signals widely adopted in practical systems from a viewpoint of their power spectral density property. Since the conventional OFDM does not make use of pulse shaping filter, its out-of-band (OOB) spectrum may not be negligible especially when the number of subcarriers is small. Thus, in practice, windowing is applied to mitigate OOB emission by smoothing the transition of consecutive OFDM symbols, but its effectiveness has not been well investigated. Furthermore, OFDM signal suffers from nonlinear distortion associated with its high signal peak-to-average power ratio (PAPR), which also leads to OOB radiation. We examine how power amplifier nonlinearity affects the spectral efficiency based on the theoretical results developed in the literature.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.2022WBI0002/_p
부
@ARTICLE{e106-a_5_752,
author={Hideki OCHIAI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={On Spectral Efficiency of OFDM Signals Based on Windowing},
year={2023},
volume={E106-A},
number={5},
pages={752-764},
abstract={We discuss the spectral efficiency of orthogonal frequency-division multiplexing (OFDM) signals widely adopted in practical systems from a viewpoint of their power spectral density property. Since the conventional OFDM does not make use of pulse shaping filter, its out-of-band (OOB) spectrum may not be negligible especially when the number of subcarriers is small. Thus, in practice, windowing is applied to mitigate OOB emission by smoothing the transition of consecutive OFDM symbols, but its effectiveness has not been well investigated. Furthermore, OFDM signal suffers from nonlinear distortion associated with its high signal peak-to-average power ratio (PAPR), which also leads to OOB radiation. We examine how power amplifier nonlinearity affects the spectral efficiency based on the theoretical results developed in the literature.},
keywords={},
doi={10.1587/transfun.2022WBI0002},
ISSN={1745-1337},
month={May},}
부
TY - JOUR
TI - On Spectral Efficiency of OFDM Signals Based on Windowing
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 752
EP - 764
AU - Hideki OCHIAI
PY - 2023
DO - 10.1587/transfun.2022WBI0002
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E106-A
IS - 5
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - May 2023
AB - We discuss the spectral efficiency of orthogonal frequency-division multiplexing (OFDM) signals widely adopted in practical systems from a viewpoint of their power spectral density property. Since the conventional OFDM does not make use of pulse shaping filter, its out-of-band (OOB) spectrum may not be negligible especially when the number of subcarriers is small. Thus, in practice, windowing is applied to mitigate OOB emission by smoothing the transition of consecutive OFDM symbols, but its effectiveness has not been well investigated. Furthermore, OFDM signal suffers from nonlinear distortion associated with its high signal peak-to-average power ratio (PAPR), which also leads to OOB radiation. We examine how power amplifier nonlinearity affects the spectral efficiency based on the theoretical results developed in the literature.
ER -