An MIMO Sonar Array for High-resolution 3D Forward-looking Imaging

Xionghou Liu, Chi Zhang, Hongyu Chen, Chao Sun, Yixin Yang, Kuan Fan, Jiapeng Liu

科研成果: 书/报告/会议事项章节会议稿件同行评审

2 引用 (Scopus)

摘要

The three-dimensional imaging sonar using a planar or volumetric hydrophone array is useful for underwater acoustic imaging, since it can provide the volumetric information of an underwater target. However, the system cost is at a high level due to the large number of hydrophones adopted. To reduce the system cost, the sparse array optimization is often used to remove a number of hydrophones and simultaneously, to keep a desired beampattern performance. Nevertheless, the angle resolution of a sparse optimized hydrophone array is not enough for relatively long range imaging application, such as the small target detection. Different from the sparse array optimization method, using a forward-looking sonar composed of several horizontally paralleled uniform linear arrays (ULAs) can achieve a good 3-D imaging ability. The 3-D forward-looking sonar is based on the slant looking imaging processing, and it combines the conventional horizontal beamforming and the high-resolution vertical beamforming together. Nevertheless, the horizontal angle resolution is restricted by the limited physical size of the sonar platform (e.g., an underwater manned vehicle or an underwater robot). What is worse, the restricted angle resolution in the horizontal direction will degrade the imaging performance of the vertical beamforming. To solve the problem, we design a MIMO sonar array layout for the 3-D forward-looking imaging. The designed MIMO sonar array is composed of two sparsely located transmitting transducers and several parallel ULAs. By doing so, the horizontal angle resolution doubles that of a traditional sonar array (which is composed of one transmitter and several paralleled ULAs), and the vertical imaging ability is substantially improved. We give an example of the MIMO sonar array, and give the imaging performance analysis to validate the effectiveness of the designed array layout.

源语言英语
主期刊名OCEANS 2019 - Marseille, OCEANS Marseille 2019
出版商Institute of Electrical and Electronics Engineers Inc.
ISBN(电子版)9781728114507
DOI
出版状态已出版 - 6月 2019
活动2019 OCEANS - Marseille, OCEANS Marseille 2019 - Marseille, 法国
期限: 17 6月 201920 6月 2019

出版系列

姓名OCEANS 2019 - Marseille, OCEANS Marseille 2019
2019-June

会议

会议2019 OCEANS - Marseille, OCEANS Marseille 2019
国家/地区法国
Marseille
时期17/06/1920/06/19

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