| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Research Abstract |
In this research, we designed binary sequences with negative auto-correlation based on LFSRs/NFSRs and the chaos theory and revealed that the proposed sequences can reduce bit error rate (BER) in asynchronous DS/CDMA systems compared with the conventional Gold sequences. Furthermore, it has been shown that the proposed spreading sequences are also useful for optical CDMA communications and local positioning systems.
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