| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
In wireless communication systems with a radio wave, received power of the radio wave drastically fluctuates because of diffraction and/or reflection. Even when the received power is low, the transmission quality can be maintained by transmitting the same modulated signal repeatedly over some wireless channels in OFDM systems, which is called ‘repetition coding’. But the repetition coding has the demerit that the transmission rate is degraded. On the other hands, the transmission quality and the transmission rate can be maintained or improved by applying the repetition coding considering Hermite symmetricity. The effect of Hermite symmetric repetition coding depends on the condition of wireless channels and/or the number of repetition. In this research, we theoretically analyze the effect and propose an adaptive control based on the theoretical result aiming for the best efficiency at any condition.
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