A fast high-resolution method for bearing estimation in shallow ocean

Authors:
Yong Jin;Jian-Guo Huang;Li-Jie Zhang;Yun-Shan Hou
Affiliations:
College of Marine, Northwestern Polytechnical University, Xi'an, China 710072 and National Key laboratory of Underwater Information Processing and Control, Xi'an, China 710072;College of Marine, Northwestern Polytechnical University, Xi'an, China 710072 and National Key laboratory of Underwater Information Processing and Control, Xi'an, China 710072;College of Marine, Northwestern Polytechnical University, Xi'an, China 710072 and National Key laboratory of Underwater Information Processing and Control, Xi'an, China 710072;College of Marine, Northwestern Polytechnical University, Xi'an, China 710072 and National Key laboratory of Underwater Information Processing and Control, Xi'an, China 710072
Venue:
Multidimensional Systems and Signal Processing
Year:
2009

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A note on "A fast high-resolution method for bearing estimation in shallow ocean"

Multidimensional Systems and Signal Processing

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Abstract

We propose a concise underwater array model based on normal mode theory and put forward a new bearing estimation method using generalized Rayleigh ratio theory to lighten the computation burden of three-dimensional MUSIC method. This method obtains source azimuths by one-dimensional search without prior knowledge of source ranges and depths. So, computational complexity of proposed method decreases exponentially compared with that of maximum likelihood (ML) and three-dimensional MUSIC. Results from simulations and lake experiments turn out to be in close agreement with theoretical analysis.