Research on ultra-low ACLP wireless communication systems using multi-dimensional signal processing
| Project/Area Number |
18H01434
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 21020:Communication and network engineering-related
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| Research Institution | Nanzan University (2020-2022)
Ibaraki University (2018-2019) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
王 瀟岩 茨城大学, 理工学研究科(工学野), 准教授 (10725667)
武田 茂樹 茨城大学, 理工学研究科(工学野), 教授 (50323209)
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2018: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
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| Keywords | 多次元信号処理 / 隣接チャネル間干渉 / 隣接チャネル漏洩電力 / PAPR / 線形化 / ガードバンド / ACI（隣接チャネル間干渉） / ACLP（隣接チャネル漏洩電力） / ACLP / 等化 / ACI / 非線形歪 |
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| Outline of Final Research Achievements |
In this research, we have proposed a new waveform of OW-DFTs-OFDM/OQAM-DFTs-OFDM which uses time-domain overlap windowing to reduce PAPR(Peak to Average Power Ratio) and ACI(Adjacent Channel Interference) and shows ACI reduction performance by the proposed waveform in linear and non-linear channel.
In addition, we have proposed a simplified digital pre-distortion type HPA linearizer using operation point estimation pilot signals for TDD-based mobile terminal, based on time/frequency/amplitude domain signal processing. We have demonstrated the feasibility of HPA ACI reduction with small output back-off, by controlling the operation point of digital HPA linearizer. We have established design method of the proposed linearizer and have shown spectrum efficiency improvement by the proposed scheme.
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| Academic Significance and Societal Importance of the Research Achievements |
次世代モバイル通信の高速・大容量化のため、更なる周波数利用効率の向上を目的として、ACLP／ACI低減、大電力増幅器の電力利用効率向上、ガードバンド削減という複合したシステムの問題に対し、システムレベルで解決することを目指した点に学術的意義がある。具体的には、ピーク対平均電力比、隣接チャネル漏洩電力の小さな信号方式、小さなバックオフでHPAを用いても隣接チャネル漏洩電力を低減する移動端末用ディジタルプリディストーションHPAリニアライザを実現する時間・周波数・振幅領域での多次元信号処理技術を検討した。研究成果は、将来のモバイル通信における周波数有効利用への貢献に社会的意義がある。
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Report
(5 results)
Research Products
(25 results)
