A Side Lobe Level Reduction Method Using Simulated Annealing Algorithm in a Uniform Arc Array

In general, the amplitude-weighting method for an acoustic transducer array is widely used to improve the array directivity and reject disturbances. This paper presents a method to effectively reduce the side lobe level while minimizing the main lobe width increase. This is done using the simulated...

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Bibliographic Details
Published in:Archives of acoustics 2024-01, Vol.49 (2), p.287-295
Main Authors: Kang, Song-Il, U, Kyong-Sim, Choe, Kyong-Chol, Ri, Yong-Kwang, Kye, Hyok-Il
Format: Article
Language:English
Subjects:
Acoustics
Algorithms
Amplitudes
Archives & records
Arrays
Beamforming
Cost function
Directivity
Methods
Sidelobe reduction
Sidelobes
Signal processing
Signal to noise ratio
Simulated annealing
Transducers
Underwater acoustics
Weighting methods
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Summary:In general, the amplitude-weighting method for an acoustic transducer array is widely used to improve the array directivity and reject disturbances. This paper presents a method to effectively reduce the side lobe level while minimizing the main lobe width increase. This is done using the simulated annealing algorithm (SAA) for a uniformly spaced arc array of omnidirectional underwater acoustic transducers, even at low signal-to-noise ratio (SNR). We propose a new cost function for the SAA and obtain the weighting coefficients for all array elements using the SAA, and next compare them with various amplitude weighting methods. Through simulation and comparison, it is verified that the proposed method is effective in beamforming of the uniform arc array of underwater acoustic transducers.
ISSN:0137-5075
2300-262X
DOI:10.24425/aoa.2024.148783