| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
In this research, we have proposed the channel estimation (CE) for amplify-and-forward (AF) relay transmissions. Before now, time frequency interferometry (TFI) has been proposed and achieves the CE with a small number of pilot signals by averaging the two time windows. Therefore, in the case of the time windows length for (maximum delay)×(number of hops), CE for AF relay transmission is achieved. However, TFI degrades the accuracy of CE in multi-hop environments. Therefore, we propose the TFI with complex signal and achieves the averaging for the four time windows. And then, the proposed TFI improves the accuracy of CE in multi-hop environments.
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