Compressing two ways: the initial study of an underwater inflatable co-prime sonar array (UICSA)

Bing Ouyang; Yanjun Li; Tongdi Zhou; Tsung-Chow Su; Fraser Dalgleish; Anni Dalgleish; Fauzia Ahmad

doi:10.1117/12.2311575

14 May 2018 Compressing two ways: the initial study of an underwater inflatable co-prime sonar array (UICSA)

Bing Ouyang, Yanjun Li, Tongdi Zhou, Tsung-Chow Su, Fraser Dalgleish, Anni Dalgleish, Fauzia Ahmad

Proceedings Volume 10658, Compressive Sensing VII: From Diverse Modalities to Big Data Analytics; 106580H (2018) https://doi.org/10.1117/12.2311575
Event: SPIE Commercial + Scientific Sensing and Imaging, 2018, Orlando, FL, United States

Abstract

In many scientific and defense surveillance missions, reducing the size, weight, and power (SWaP) of sensing systems is critical to accomplishing the intended objectives. At the backend, compressive sensing (CS) has been widely adopted to maintain the signal fidelity with less measurements, thereby reducing the hardware complexity. On the other hand, SWaP reduction can also be achieved with intelligent mechanical design. In this paper, we discuss a novel system concept, namely, Underwater Inflatable Co-prime Sonar Array (UICSA), which provides SWaP compression on two fronts. First, the sonar array is implemented as an inflatable structure, also referred to as a deployable structure, which is a folded package with compact stowed dimension. The folded package can be detached from a carrying platform and it can morph into its final structure form at the destination. Second, a sparse array configuration, namely, a co-prime array, is employed, which can resolve a much higher number of sources compared to a conventional uniform half-wavelength spaced array for a given number of sensors. The integration of these two concepts leads to a simulatenous reduction in the stowed dimension of the sonar array and the number of employed hydrophones. We describe the development of a UICSA prototype and provide underwater source direction-of-arrival estimates obtained using initial datasets acquired with the developed prototype.

Citation Download Citation

Bing Ouyang, Yanjun Li, Tongdi Zhou, Tsung-Chow Su, Fraser Dalgleish, Anni Dalgleish, and Fauzia Ahmad "Compressing two ways: the initial study of an underwater inflatable co-prime sonar array (UICSA)", Proc. SPIE 10658, Compressive Sensing VII: From Diverse Modalities to Big Data Analytics, 106580H (14 May 2018); https://doi.org/10.1117/12.2311575

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