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논문 기본 정보

자료유형
학술저널
저자정보
Md. Najmul Hossain (Saitama University) Tetsuya Shimamura (Saitama University) Heung-Gyoon Ryu (Chungbuk National University)
저널정보
대한전자공학회 IEIE Transactions on Smart Processing & Computing IEIE Transactions on Smart Processing & Computing Vol.8 No.6
발행연도
2019.12
수록면
490 - 498 (9page)
DOI
10.5573/IEIESPC.2019.8.6.490

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초록· 키워드

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Since frequency resources are limited, and power saving is also a vital issue, a more spectrum-efficient and power-saving communications system design is the most important research goal. In this paper, we propose an improved, spectrally efficient new discrete Fourier transform (DFT)-Spread Windowing and Restructuring (WR)-Orthogonal Frequency Division Multiplexing (DFT-Spread WR-OFDM) communications system, in thought of various strengths of high-power amplifier (HPA) nonlinearity for a reasonably allowable peak-to-average power ratio (PAPR) and out-of-band (OOB) power emission reduction. Compensation for HPA nonlinearity becomes a difficult task when properly designing efficient multicarrier schemes and fifth generation (5G)-beyond 5G candidate waveforms for cellular wireless communications systems. In practical communications systems, spectral efficiency and power are highly affected by HPA nonlinearity features, and bit error rate (BER) performance also deteriorates. We implemented a time domain window named Tukey (tapered cosine) and localized subcarrier mapping, and the impact of HPA nonlinearity on BER performance and spectral characteristics is comprehensively analyzed. Simulation results demonstrate that the proposed system reduces PAPR and OOB power emissions by 3.176 ㏈ and -81 ㏈, respectively. Additionally, compared to conventional systems, the communication quality of the proposed scheme clearly demonstrates better performance even inHPA nonlinear environments.

목차

Abstract
1. Introduction
2. Related Work
3. The Proposed Scheme
4. Performance Evaluation
5. Conclusion
References

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