NDLI: Underwater three-dimensional imaging using narrowband MIMO array

Content Provider	Springer Nature Link
Author	Liu, XiongHou Sun, Chao Yi, Feng Liu, ZongWei Li, MingYang
Copyright Year	2013
Abstract	To obtain high cross-range resolution, the underwater 3-D acoustic imaging system usually requires a rectangular array with a great number of sensors and a large physical size. To reduce the sensor number and the array physical size simultaneously, this paper proposes a new underwater 3-D acoustic imaging approach based on a novel multiple-input multiple-output (MIMO) array. Specifically, the MIMO array is composed of four uniform linear arrays (ULAs) located on four sides of a rectangle. The transmitting array composed of two ULAs is located on a pair of opposite sides, and the receiving array composed of another two ULAs is located on the other two sides. Furthermore, narrowband waveforms coded with orthogonal polyphase sequences are employed as transmitting waveforms. When the subcode numbers in the polyphase coded sequences are sufficient, the MIMO array has the same 3-D imaging ability as a rectangular array, which has a two-time bigger size than that of the former. Consequently, the MIMO array can not only save a great number of sensors, but halve the array size, when compared to a rectangular array with the same cross-range resolution. Computer simulations are provided to demonstrate the effectiveness of the proposed imaging approach.
Starting Page	1346
Ending Page	1354
Page Count	9
File Format	PDF
ISSN	16747348
Journal	Science in China Series G
Volume Number	56
Issue Number	7
e-ISSN	18691927
Language	English
Publisher	SP Science China Press
Publisher Date	2013-05-23
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	underwater acoustic imaging 3-D imaging multiple-input multiple-output (MIMO) array sparse array Physics Classical Continuum Physics Astronomy, Observations and Techniques
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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