Super-High-Density Optical Wavelength Division Multiplex Transmission System with Multi-dimensional Coded Modulation to Reduce Inter-Wavelength Signal Interference

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K06333
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Communication/Network engineering
• Research Institution: Ibaraki University
• Principal Investigator: Naka Akira 茨城大学, 理工学研究科(工学野), 教授 (20765854)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: デジタルコヒーレント光伝送技術 / 多次元符号化光変調方式

Outline of Final Research Achievements

We have been engaged in the multi-dimensional coded modulation method, in which the Euclidean distance is enlarged by a set-partitioning of a group of symbols composed of two polarization spaces, to achieve further development of digital coherent optical transmission technology.
We have applied the coded modulation method called BICM-ID to multiple multi-dimensional optical modulation signal and evaluated the transmission characteristics in digital coherent optical transmission. And we have presented the research results as 3 papers and 7 conference presentations.

Free Research Field

光通信

Academic Significance and Societal Importance of the Research Achievements

今回取り組んだ多次元符号化光変調方式の高度化は、2010年代初めに登場したデジタルコヒーレント光通信技術を利用し、無線伝送分野でも研究が進んでいる情報理論に基づく符号化変調方式を、光ファイバ通信特有の条件を考慮して応用を試みる点に大きな学術的意義がある。今回得られた成果は、近年のインターネットを介した動画や音楽などの大容量コンテンツの普及に伴い、益々重要性を増している光通信ネットワークの超高速化・大容量化のための基盤技術を提供する。