2019 Fiscal Year Final Research Report
Code Design Based on Chaos Theory and Its Application to Short-Range Communication
Project/Area Number |
16K06361
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Communication/Network engineering
|
Research Institution | Kumamoto University |
Principal Investigator |
TSUNEDA Akio 熊本大学, 大学院先端科学研究部(工), 准教授 (40274493)
|
Project Period (FY) |
2016-04-01 – 2020-03-31
|
Keywords | カオス理論 / CDMA / 可視光通信 / 非線形フィードバックシフトレジスタ / 負相関系列 / ユニポーラ符号 / 測位システム |
Outline of Final Research Achievements |
It has been shown that many spreading codes with negative auto-correlation suitable for asynchronous CDMA communications can be generated by NFSRs. Also, some sets of such spreading codes which are orthogonal to each other can be generated and they are suitable for optical CDMA communications. Furthermore, we proposed concatenated codes obtained by a Barker sequence and an NFSR sequence for positioning systems and investigated their aperiodic auto-correlation properties. Due to the excellent aperiodic auto-correlation property of Barker sequence, the side lobes of the proposed concatenated sequences are small.
|
Free Research Field |
情報通信工学、非線形理論
|
Academic Significance and Societal Importance of the Research Achievements |
可視光通信は、次世代の近距離無線通信の有力な通信方式であり、多重方式としてCDMAが採用された場合、本研究で提案した負相関スペクトル拡散符号は有用である。また、提案した測位用符号は、病院内など電波の利用が制限された環境における屋内測位システムでの利用が考えられる。
|