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Sensors 2018, 18(1), 291;

Joint Bearing and Range Estimation of Multiple Objects from Time-Frequency Analysis

Department of Electrical Engineering, National Taiwan Ocean University, No.2 Pei-ning Rd., Keelung 20224, Taiwan
All authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 5 November 2017 / Revised: 22 December 2017 / Accepted: 15 January 2018 / Published: 19 January 2018
(This article belongs to the Special Issue Smart Sensors for Mechatronic and Robotic Systems)
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Direction-of-arrival (DOA) and range estimation is an important issue of sonar signal processing. In this paper, a novel approach using Hilbert-Huang transform (HHT) is proposed for joint bearing and range estimation of multiple targets based on a uniform linear array (ULA) of hydrophones. The structure of this ULA based on micro-electro-mechanical systems (MEMS) technology, and thus has attractive features of small size, high sensitivity and low cost, and is suitable for Autonomous Underwater Vehicle (AUV) operations. This proposed target localization method has the following advantages: only a single snapshot of data is needed and real-time processing is feasible. The proposed algorithm transforms a very complicated nonlinear estimation problem to a simple nearly linear one via time-frequency distribution (TFD) theory and is verified with HHT. Theoretical discussions of resolution issue are also provided to facilitate the design of a MEMS sensor with high sensitivity. Simulation results are shown to verify the effectiveness of the proposed method. View Full-Text

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Liu, J.-C.; Cheng, Y.-T.; Hung, H.-S. Joint Bearing and Range Estimation of Multiple Objects from Time-Frequency Analysis. Sensors 2018, 18, 291.

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