Volume 39, Number 3, June 2021
|Page(s)||471 - 476|
|Published online||09 August 2021|
Bionic target localization method based on range-azimuth joint dictionary
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
The traditional underwater sonar system usually achieve high angle resolution by increasing array aperture and the number of array elements, but this method will inevitably lead to complex system and high cost. Given that big brown bats have obtained surprisingly high resolution using a simple system, this paper proposes a bionic target localization method. First, a range-azimuth joint dictionary was constructed based on the bionic system of multi-harmonic emission and double random array reception. Then, the coherence characteristic of the dictionary was analyzed and the range and azimuth of the target were estimated, and at last the experimental verification was completed. The results show that the bionic range-azimuth joint estimation based on sparse signal representation can achieve high-precision target localization under the condition of echo high aliasing.
Key words: bionic / sparse signal representation / target localization / range-azimuth joint dictionary
关键字 : 仿生 / 稀疏表达 / 标定位 / 距离-方位字典
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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