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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.

- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E106-A No.5 pp.752-764

- Publication Date
- 2023/05/01

- Publicized
- 2022/12/19

- Online ISSN
- 1745-1337

- DOI
- 10.1587/transfun.2022WBI0002

- Type of Manuscript
- Special Section INVITED PAPER (Special Section on Intelligent Transport Systems and Wideband Systems)

- Category

Hideki OCHIAI

Yokohama National University

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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

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@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},}

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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 -