Matched filter (MF) and conventional beamforming (CBF) are widely used in active sonar; the performance of the former (temporal resolution) is limited by the signal bandwidth, and that of the latter (angular resolution) is limited by the array aperture. Previous work has shown that angular resolution can be significantly improved by deconvolving the CBF outputs. In this paper, deconvolution is extended to the time domain by deconvolving the MF outputs, and a high-resolution two-dimensional deconvolution method is proposed to simultaneously improve the temporal and angular resolution. Numerical simulations and experimental tank data show that angular resolutions are improved 26 times, and temporal resolutions are improved 10 times compared with the conventional MF and CBF methods. Reverberations are much suppressed to allow target echoes to be detected from the received time series data.

中文翻译：

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水下目标高分辨率主动定位的束时延时域反卷积方案

有源声纳中广泛使用了匹配滤波器（MF）和常规波束成形（CBF）。前者的性能（时间分辨率）受限于信号带宽，后者的性能（角度分辨率）受限于阵列孔径。先前的工作表明，通过对CBF输出进行反卷积可以显着提高角度分辨率。本文通过对MF输出进行解卷积将反卷积扩展到时域，并提出了一种高分辨率的二维反卷积方法来同时提高时间和角度分辨率。数值模拟和实验坦克数据表明，与传统的MF和CBF方法相比，角分辨率提高了26倍，时间分辨率提高了10倍。