The Design of Sub Region FFT Beam Forming Algorithm of 3D-sonar

YU Difei; HUANG Haining; ZHANG Chunhua; WU Changrui

doi:10.11999/JEIT161132

Volume 39 Issue 9

Sep. 2017

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Article Navigation > Journal of Electronics & Information Technology > 2017 > 39(9): 2175-2181

YU Difei, HUANG Haining, ZHANG Chunhua, WU Changrui . The Design of Sub Region FFT Beam Forming Algorithm of 3D-sonar[J]. Journal of Electronics & Information Technology, 2017, 39(9): 2175-2181. doi: 10.11999/JEIT161132

Citation:

YU Difei, HUANG Haining, ZHANG Chunhua, WU Changrui . The Design of Sub Region FFT Beam Forming Algorithm of 3D-sonar[J]. Journal of Electronics & Information Technology, 2017, 39(9): 2175-2181. doi: 10.11999/JEIT161132

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The Design of Sub Region FFT Beam Forming Algorithm of 3D-sonar

doi: 10.11999/JEIT161132

Funds:

The National Natural Science Foundation of China (11304343)

Received Date: 2016-10-25
Rev Recd Date: 2017-05-31
Publish Date: 2017-09-19

Abstract

Abstract

In order to solve the problem that traditional uniform FFT beamforming algorithm reduces the resolution of 3-D sonar imaging, this paper presents a sub-region FFT beamforming algorithm. In the far field, the imaging area is partitioned into multiple regions using genetic algorithm as the optimization method. The objective of the optimization process is to minimize the number of partitions, with the constraints being the imaging resolution. In each region, a beam direction is selected to obtain the demodulated output when each receiving element receives the directional echo as the original data, and the traditional uniform FFT beamforming is performed in the region. The FFT computation process is optimized to reduce the computational complexity of the new algorithm to meet the real-time requirements of 3D imaging sonar. Simulation and experimental results show that the imaging resolution of the sub-region FFT beamforming algorithm is significantly higher than that of the traditional uniform FFT beamforming algorithm, and satisfies the real-time requirement.
- Hydroacoustics,
- 3-D sonar system,
- Beam forming,
- Imaging resolution,
- FFT

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References(26)

References

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