| Project/Area Number |
23560475
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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 Technology |
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Principal Investigator |
UEDA Hiromi 東京工科大学, コンピュータサイエンス学部, 教授 (80367200)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 光アクセスネットワーク / PON / ディジタル変調 / QAM / クリップ / サブキャリア / 光送信電力 / ONU / 多重 / 送信電力 |
|---|
| Research Abstract |
To economically provide higher bit rate services to users, we proposed the Subcarrier Digital Modulation Passive Optical Network (SDM-PON). We first showed the feasibility of a 16-QAM SDM-PON that constantly provides the service data rate of 1 Gbps to each user, in which ONU biases the QAM signal higher so that it is entirely positive before converting into an optical signal (bias signal sending scheme). To decrease its sending optical power, we then proposed a scheme for clipping negative components of the electrical QAM signal (clipped signal sending scheme), along with three methods for regenerating the original QAM signal at the receiving side. We showed that the clipped sending signal scheme, and all three regenerating methods, are effective by simulation. The resulting SDM-PON can support 24 ONUs We also showed how much the clipped signal sending method can reduce average optical launch power as compared to the bias signal sending method.
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