Differential-encoding aided physical-layer security

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K14987
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 21020:Communication and network engineering-related
• Research Institution: Yokohama National University (2020-2021); Hiroshima City University (2019)
• Principal Investigator: Ishikawa Naoki 横浜国立大学, 大学院工学研究院, 准教授 (00801713)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 無線通信 / 物理層セキュリティ / カオス理論 / 秘密容量 / 大規模アンテナアレイ / 差動符号化 / インデックス変調

Outline of Final Research Achievements

The intensive demand for wireless communications has increased worldwide due to the rapid market growth in the automotive, medical, infrastructure sectors, etc. In contrast, the radio spectrum is a public resource that no longer has much room for wireless communications. Multiple-input multiple-output (MIMO) is a representative technology to improve the spectrum efficiency, which has been adopted in typical wireless standards. Since around 2010, its large-scale extension, massive MIMO, has been extensively studied due to its capability to mitigate interference, where the number of transmit antennas is increased as much as possible.

Free Research Field

通信工学

Academic Significance and Societal Importance of the Research Achievements

研究代表者はこれまでに、大規模アンテナアレイシステムで動作する非同期検波に基づく通信方式「非正方差動符号化」を提案してきた。通信オーバーヘッドと情報漏洩リスクを高める基準シンボルの送信を高速移動体環境においてどこまで減らすことができるだろうか。本研究では非正方差動符号化を発展させ、電波の指向性制御による干渉低減が可能であるか、また、差動符号化による信号点の攪乱が物理層セキュリティの改善に寄与するか、これ2点について理論的側面から検証し、IEEE国際誌筆頭4編、共著2編、その他5編の発表に至った。