Acoustic localization for indoor pedestrian navigation by full-wave signal processing

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K20305
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 61010:Perceptual information processing-related
• Research Institution: National Institute of Advanced Industrial Science and Technology (2021); Gifu National College of Technology (2019-2020)
• Principal Investigator: Satoki Ogiso 国立研究開発法人産業技術総合研究所, 情報・人間工学領域, 研究員 (10821738)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 屋内測位 / 音響計測 / 相関関数

Outline of Final Research Achievements

The objective of this research is to establish a positioning method that does not require time synchronization at the environment side by using a microphone array at the receiver and robust against multipath and underdetermined microphone configuration. The proposed method calculates the time difference of arrival of the sound between the microphones for each candidate position and attitude. The value of the cross-correlation function at this time difference is used as the likelihood. Experiments showed that the proposed method is not easily affected by shielding and multipath, and that it can be applied to a microphone array with a minimum configuration of two elements.

Free Research Field

音響計測

Academic Significance and Societal Importance of the Research Achievements

本研究は音響測位について、物による遮蔽や壁などからの反射に対して頑健な測位を実現するものである。提案法の枠組みで確立した相対移動情報との統合については、歩行者の測位などへと応用できるものと考えている。このほか、マイク等の各時刻同期条件に応じて導出した提案法については、音響測位のみならず電波などを用いる場合でも適用可能である。