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Radial source velocity estimation based on cross-spectrum equalization accumulation compensation in shallow water
1Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, People's Republic of China.
JASA Express Letters
|May 1, 2023
Summary
This study introduces an improved method for target velocity estimation, enhancing interference immunity by refining cross-spectrum analysis. The new technique effectively suppresses interference, leading to more accurate velocity measurements.
Area of Science:
- Signal Processing
- Ocean Acoustics
- Target Tracking
Background:
- Histogram-based methods previously improved target velocity estimation using cross-spectrum analysis.
- However, these methods can introduce bias and have limitations in interference suppression.
Purpose of the Study:
- To propose a novel method for target velocity estimation that eliminates histogram-induced bias.
- To further enhance interference immunity in cross-spectrum-based velocity estimation.
Main Methods:
- Design of an equalization window to preserve cross-spectrum peaks while suppressing interference.
- Compensation and accumulation across all frequency points to boost interference immunity.
Main Results:
- The proposed method effectively suppresses interference peaks while preserving target cross-spectrum peaks.
- Simulation and sea trial data confirm the enhanced performance and accuracy of the new technique.
Conclusions:
- The novel equalization window and frequency point accumulation method significantly improves interference immunity for target velocity estimation.
- This approach offers a more robust and accurate solution for velocity estimation in challenging acoustic environments.
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