NDLI: Rotated DFT-s-OFDM for transmitting PAPR-minimised BPSK symbols

Content Provider	IET Digital Library
Author	Cho, L. Huang, W. Hsu, C. Y.
Abstract	The third generation partnership project has recommended π/2-binary phase-shift keying (BPSK) in discrete-Fourier-transform-spread orthogonal frequency division multiplexing (DFT-s-OFDM) for low peak-to-average power ratio (PAPR) uplink transmission. Recently, the rotation angle of 7π/6 for rotated BPSK has been proposed by J. Kim et al. to achieve optimal PAPR performance. However, the authors discovered that this angle might negate the contribution to PAPR reduction in most number of allocated subcarriers owing to the discrete-Fourier-transform (DFT) boundary-matching problem. To solve this issue, they propose a novel scheme to fine-tune the rotation angle to approximately 7π/6 in a manner compatible with the long-term evolution/new radio specification, while ensuring that the data phase matches the periodicity. Simulations show that the proposed scheme can stably improve the PAPR by ∼0.2 dB compared to π/2-BPSK for any DFT spacing, thereby benefiting user equipment by providing better power efficiency and wider signal coverage without additional computational complexity.
Starting Page	1350
Ending Page	1352
Page Count	3
ISSN	00135194
Volume Number	56
e-ISSN	1350911X
Issue Number	Issue 24, Nov (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/56/24
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2020.2214
Journal	Electronics Letters
Publisher Date	2020-11-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	3G Mobile Communication Allocated Subcarriers Computational Complexity Data Phase DFT Spacing Discrete Fourier Transform Discrete-Fourier-transform-spread Orthogonal Frequency Division Multiplexing Integral Transforms Mobile Radio System Modulation And Coding Method Noise Figure 0.2 DB OFDM Modulation Optimal PAPR Performance PAPR Reduction PAPR-minimised BPSK Symbols Peak-to-average Power Ratio Uplink Transmission Phase Shift Keying Radio Link Rotated DFT-s-OFDM Rotation Angle Third Generation Partnership Project
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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