双线阵列合成孔径技术

I. Yang, Seung-Yong Yang, Ki-Man Kim
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引用次数: 0

摘要

提出了一种用于双线阵列的合成孔径技术。为了提高水下环境下的信噪比和角分辨率,对拖曳线阵系统进行了研究。但要做到这一点,它需要一个大孔径。它引起了物理问题——波动、传感器定位、拖曳阵列等。它在接收器的相对角度之间有左右歧义。为了解决这些问题,我们使用双线。当使用相同数量的传感器时,由于孔径尺寸较短,会产生角度误差。为了提高信号的信噪比和角分辨率,我们对双线进行了合成孔径处理。本文提出了一种利用FFT合成波束域孔径并对连续时间间隔的子孔径信号进行相干处理的方法。
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Synthetic aperture technique for twin-line array
We propose a synthetic aperture technique for a twin-line array. The towed line array system has been investigated in underwater environments to improve the signal-to-noise ratio and angular resolution. But to achieve that, it required a long aperture size. It caused physical problems-fluctuations, sensor positioning, towing array etc. It has a left-right ambiguity at the receiver between the opposite angles. To resolve these problems, we use a twin-line. It cause an angular error due to the shorter aperture size when the same number of sensors is used. To improve the signal-to-noise ratio and angular resolution we process the synthetic aperture for the twin-line. A method is presented here that synthesizes apertures in the beam domain using FFT and performs coherent processing of sub-aperture signals at successive time intervals.
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