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For an underwater 2-D imaging sonar system, to discriminate echoes reflected back in the 3-D space, a rectangular array is necessary. However, to obtain a high cross-range resolution, the physical size and the sensor number of the array will become inevitably large. To avoid this, a highresolution 2-D imaging approach based on a multiple-input multiple-output (MIMO) sonar is proposed in this paper...
An ultra-wideband (UWB) imaging system can provide better cross-range resolution by using large-bandwidth waveforms. Nevertheless, the conventional sonar imaging system can hardly emit and process UWB waveforms directly due to limited system bandwidth. To solve the problem, a 2-D imaging approach based on an UWB multiple-input multiple-output (UWB-MIMO) sonar is proposed. The UWB-MIMO sonar is composed...
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