Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Acoustic localization method in floating state of sensors
| DOI: | 10.11809/bqzbgcxb2025.02.024 |
| Keywords: | passive underwater acoustic positioning; TDOA/FDOA; Taylor series expansion; sensor floating; CRLB |
| Abstract: | In response to the problem of inaccurate positioning caused by the floating position of sensors underwater in passive underwater acoustic positioning research, this paper proposes an improved method for passive underwater acoustic target positioning based on two step weighted least squares method, which combines Time Difference of Arrival (TDOA) and Frequency Difference of Arrival (FDOA). This method first estimates the position and velocity of the target through the minimum weighted multiplication of Taylor series expansion, and then constructs a new positioning error equation, adjusts the estimated values, and obtains the optimal motion target parameter estimation. Through theoretical analysis, it has been proven that under the floating state of the sensor, this method can achieve the corresponding Cramer Rao Lower Bound (CRLB) under low noise. Simulation results show that this method has better robustness and outperforms existing methods, and can better estimate the position and velocity of underwater moving targets. |
| Issue: | Vol. 46 No. 2 (2025) |
| Published: | 2025-02-28 |