2020 Fiscal Year Final Research Report
A low power reception method of emergency automatic wake-up signal on ISDB-T television broadcaster transmitted radiowaves
| Project/Area Number |
17K06436
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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 | Hiroshima City University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Keywords | 地上ディジタルテレビ / ISDB-T / 緊急警報放送 / 低消費電力受信 / パリティ |
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| Outline of Final Research Achievements |
When there is a risk of a disaster, the ISDB-T digital television broadcaster can automatically activate their receiver by superimposing a special signal on the broadcast signal. The objective of this study is to derive the method of receiving the activation signal with a higher reliability and a lower power consumption at a mobile receiver. The method of reliably receiving the activation signals, the method of deriving the mutual information obtained from the receiver, and the method of detecting the radiowave reception condition, and the method of reducing erroneous determination using past signal detection results were proposed through this study. In a typical example of receiving an automatic activation signal in an automobile, it was shown that the power consumption of the proposed receiver was reduced by about 1/5 than that of the conventional receiver.
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| Free Research Field |
工学
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| Academic Significance and Societal Importance of the Research Achievements |
無線信号の存在を誤って見逃す確率を低くするために信号強度判定しきい値を低くすると，無信号時に誤って信号があると判断する確率が高まり，受信機の電力を不必要に消費する．その信号検出回路は，その他の回路よりも充分に小さいので，信号検出方法の高度化は待機消費電力削減につながる．高信頼かつ低消費電力にて信号検出を行うこの研究課題から得た結論は，一般の無線信号の待機受信を伴う信号検出にも応用できるものと考えている．
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