| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
It becomes possible to construct a sensor network reaching about 100 m at various frequencies using Extremely Low Power Radio Station. It is possible to secure about 700 channels with commercially available software radios. The system will enable 1 household to operate 700 sensors without worrying about radio waves colliding.
The problem with narrowband spread spectrum communication is how to deal with the frequency shift between the transmitter and receiver. Until now, both the transmitter and the receiver have been dealt with by using an expensive crystal oscillator, but the use of software radio makes it possible for the receiver to track the frequency shift. The results of this research have made it possible to realize narrowband communication at low cost.
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