| Project/Area Number |
15K06086
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
Yohtaro Umeda 東京理科大学, 理工学部電気電子情報工学科, 教授 (80439918)
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| Research Collaborator |
KOZAWA Yusuke 東京理科大学, 理工学部, 助教
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 直交変調 / 包絡線パルス幅変調 / EPWM / 送信機 / スイッチング / D級 / 電力増幅器 / 量子化雑音 |
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| Outline of Final Research Achievements |
In this research, we propose a technique to solve the problem of power efficiency and modulation accuracy due to quantization noise and the problem of power efficiency degradation due to switching loss of Class D power amplifier for quadrature-modulation (QM) envelope pulse-width modulation (EPWM) wireless transmitter. For the former problem, we proposed a quantization noise canceling technique, a quantization noise removal and recovery technique, and a transmitter architecture that does not generate quantization noise. For the latter, we propose Class DE modification of class D PA and a QM-EPWM transmitter architecture that satisfies zero current switching (ZCS) condition. Furthermore, the impact of these proposed techniques is shown by simulation and experiment.
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