A subspace-based array shape estimation method using a single reference source in nearfield

2005 ◽  
Author(s):  
Hee-Young Park ◽  
Won Tchon Oh ◽  
Dae-Hee Youn ◽  
Chungyong Lee
Keyword(s):  
Estimation Method ◽  
Reference Source ◽  
Shape Estimation ◽  
Array Shape Estimation

scholarly journals Real-time Array Shape Estimation Method of Horizontal Suspended Linear Array Based on Non-acoustic Auxiliary Sensors

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Zonglun Che ◽  
Jun Wang ◽  
Jing Zhu ◽  
Bingbing Zhang ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Real Time ◽  
Linear Array ◽  
Estimation Method ◽  
Shape Estimation ◽  
Array Shape Estimation

scholarly journals An Enhanced Data-Driven Array Shape Estimation Method Using Passive Underwater Acoustic Data

2021 ◽  
Vol 13 (9) ◽  
pp. 1773
Author(s):  
Qisong Wu ◽  
Hao Zhang ◽  
Zhichao Lai ◽  
Youhai Xu ◽  
Shuai Yao ◽  
...  
Keyword(s):  
Time Delay ◽  
Narrow Band ◽  
Estimation Method ◽  
Poor Performance ◽  
Data Driven ◽  
Shape Estimation ◽  
Underwater Acoustic ◽  
Acoustic Data ◽  
Hydrophone Array ◽  
Array Shape Estimation

Beamforming-based signal enhancement technologies in passive sonar array processing often have poor performance due to array distortion caused by rapid tactical maneuvers of the towed platform, oceanic currents, hydrodynamic effects, etc. In this paper, an enhanced data-driven shape array estimation formulation is proposed using passive underwater acoustic data. Beamforming based on a hypothetically ideal array is firstly employed to perform the detection of narrow-band components from sources of opportunity, and the corresponding phases of these detected narrow-band components are subsequently extracted to acquire time-delay differences. Then, a weighted outlier-robust Kalman smoother is proposed to acquire enhanced estimates of the time-delay differences, since the underlying properties of slowly changing time-delay differences in the hydrophone array and diverse signal to interference and noise ratios in multiple narrow-band components are explored; and its Cramer–Rao Lower Bound is also provided. Finally, the hydrophone array shape is estimated based on the estimated time delay differences. The proposed formulation fully exploits directional radiated noise signals from distant underwater acoustic targets as sources of opportunity for real-time array shape estimation, and thus it requires neither the number nor direction of sources to be known in advance. The effectiveness of the proposed method is validated in simulations and real experimental data.

Direct measurement and matched-field inversion approaches to array shape estimation

1996 ◽  
Vol 21 (4) ◽  
pp. 393-401 ◽  
Author(s):  
W.S. Hodgkiss ◽  
D.E. Ensberg ◽  
J.J. Murray ◽  
G.L. D'Spain ◽  
N.O. Booth ◽  
...  
Keyword(s):  
Direct Measurement ◽  
Shape Estimation ◽  
Array Shape Estimation ◽  
Field Inversion

scholarly journals Array shape estimation via piecewise subarray beamforming

1986 ◽  
Vol 80 (S1) ◽  
pp. S26-S26
Author(s):  
Deanna M. Caveny ◽  
Donald R. Del Balzo ◽  
Jeffrey L. Becklehimer ◽  
George E. Ioup
Keyword(s):  
Shape Estimation ◽  
Subarray Beamforming ◽  
Array Shape Estimation

A new towed array shape estimation scheme for real‐time sonar systems

1996 ◽  
Vol 100 (4) ◽  
pp. 2578-2578 ◽  
Author(s):  
Feng Lu ◽  
Evangelos Milios ◽  
Stergios Stergiopoulos
Keyword(s):  
Real Time ◽  
Shape Estimation ◽  
Sonar Systems ◽  
Estimation Scheme ◽  
Towed Array ◽  
Array Shape Estimation

New towed-array shape-estimation scheme for real-time sonar systems

2003 ◽  
Vol 28 (3) ◽  
pp. 552-563 ◽  
Author(s):  
Feng Lu ◽  
E. Milios ◽  
S. Stergiopoulos ◽  
A. Dhanantwari
Keyword(s):  
Real Time ◽  
Shape Estimation ◽  
Sonar Systems ◽  
Estimation Scheme ◽  
Towed Array ◽  
Array Shape Estimation
Sign in / Sign up

Export Citation Format

Share Document