Unifying Position Verification and Position Estimation: Case of Received Signal Strength

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K14743
• 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: National Institute of Maritime, Port and Aviation Technology
• Principal Investigator: Naganawa Junichi 国立研究開発法人海上・港湾・航空技術研究所, 電子航法研究所, 主任研究員 (40760400)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 位置検証 / 位置推定 / 受信信号強度 / ADS-B

Outline of Final Research Achievements

A theory was successfully derived to handle position verification problem and position estimation in the unified framework. Based on the common assumptions, each performance was derived separately: test statistic, probability of a false alarm, and probability of detection for position verification, and accuracy for position estimation. Then, the results were mutually converted. For example, the result of position estimation was exploited to position verification. As a result, the theories of position verification and estimation were unified as a whole. The derived theory was applied to an aviation system called ADS-B, which derived a useful insight for performance improvement. In particular, a direct approach for position verification was compared with an indirect approach, which is based on position estimation result. The latter showed a better performance when enough number of receivers are available.

Free Research Field

航空監視，電波伝搬

Academic Significance and Societal Importance of the Research Achievements

位置検証は，不正な位置情報という脆弱性に対処するための技術である。本研究の成果は位置検証の性能向上に資するものであり，社会の安心・安全に貢献するものである。特に，位置検証は位置推定と比べて新しい技術であるため，理論的な基盤を構築した意義は高い。今後，位置推定で発展した技術を取り込み，さらなる性能向上につなげることが期待される。また，本研究では理論導出のみならず，実際の航空用システムであるADS-Bへの適用も検討した。ADS-Bは今後我が国でも導入が進むため，本研究の検討結果の活用が期待される。これは航空分野における安心・安全に貢献するものである。