| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥3,100,000 (Direct Cost: ¥3,100,000)
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| Research Abstract |
It is for a purpose of this study to prevent a traffic accident using inter-vehicle communication. At first I analyzed a traffic accident, and there were the most encounter head collisions by 27.2%, and a rear-end collision accident were 24%. I can prevent a rear-end collision accident by a communication in a prospect here, but I foresee it in order to prevent an encounter head accident, and outside communicates. Because rear-end collision accident prevention can apply the encounter head accident prevention method that I dropped in, and utilized diffraction of an electric wave, too, I can reduce a traffic accident largely.
I measured a quantity of decrement by diffraction of an electric wave in a crossing next. As a result a quantity of decrement of VHF zone (30MHz- 100MHz) was 50dB at a spot of distance 100m. I understood that decrement by diffraction and multi-path was not suitable greatly in 2.4GHz zone. An address layout was unnecessary, and it suggested comprehension, FDM-GMSK system that the TV station type which was not a network, was good in order to communicate between 100 cars and short time as 100m in a service area.
And I show a spec of transmitter and receiver of FDM-GMSK and suggest the parallel demodulation that used FFT as a receiver of a 100 channel. And I can use FH - SS system like rear-end collision prevention when there is a little number of a car. For the transmitter and receiver of FH - SS system in a study of the first year let a high-speed synthesizer of 256KHz complete.
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