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Three-Dimensional Tracking of a Target under Angle-Frequency Measurements with Multiple Frequency Lines
1System Engineering Department, Sejong University, Seoul 05006, Republic of Korea.
Sensors (Basel, Switzerland)
|July 8, 2023
Summary
This study introduces a new method for tracking underwater targets using sound frequencies. The approach reduces computational load and improves accuracy by averaging frequency data, enhancing underwater target motion analysis.
Area of Science:
- Underwater acoustics
- Signal processing
- Target motion analysis
Background:
- Underwater target tracking is crucial for navigation and defense.
- Traditional methods struggle with intermittent signal loss from targets.
- Estimating target position and velocity requires precise acoustic data.
Purpose of the Study:
- To develop a novel 3D Angle-Frequency Target Motion Analysis (AFTMA) method.
- To address challenges posed by disappearing and appearing frequency lines from targets.
- To improve the efficiency and accuracy of underwater target tracking.
Main Methods:
- Proposing an Angle-Frequency Target Motion Analysis (AFTMA) filter for 3D tracking.
- Estimating the average emitting frequency as a filter state vector.
- Utilizing azimuth, elevation, and averaged frequency line measurements.
Main Results:
- Averaging frequency measurements reduces noise and computational load.
- The proposed method decreases root mean square error (RMSE) compared to individual frequency tracking.
- Successful demonstration of the 3D AFTMA filter performance via MATLAB simulations.
Conclusions:
- The novel 3D AFTMA approach offers a more robust solution for underwater target tracking.
- Estimating average frequency provides a computationally efficient and accurate tracking alternative.
- This method uniquely enables ownship tracking using multiple frequency lines from underwater targets.
