2009 Fiscal Year Final Research Report
Optical CDMA using time varying code and long code
| Project/Area Number |
19560396
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
HIROYUKI Yashima Tokyo University of Science, 工学部・第一部, 教授 (30230197)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 光CDMA |
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| Research Abstract |
In this research, we propose new optical codedivision-multiple-access (OCDMA) systems using the extended chaotic binary codes (ECBCs) obtained easily from the extended Bernoulli map. Unlike conventional sequence codes, the ECBCs are composed by the map for every information bit, which means that the sequence code varies bit by bit. Therefore, high security against eavesdropping is expected. Then, we derive the expression for theoretical BER versus the number of simultaneous users of the proposed system and verify that the proposed system is effective in OCDMA system through numerical results.
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