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本文研究了在某型声纳中应用高分辨技术进行被动多目标测向的若干问题。主要包括目标辐射噪声带宽如何利用,圆弧阵各阵元安装方向不同和性能不一致的校正方法,以及目标源强度不同对算法的影响等。研究表明,对于 MUSIC类利用噪声子空间进行方位估计的高分辨算法,目标强度不同仅使得角谱谱峰高低有差异,只要各目标源的最低信噪比不低于某一门限,仍可得到准确估计结果。通过应用宽带聚焦技术和误差补偿技术,可以有效地提高算法在实际环境中的估计性能。
In this paper, some problems of passive multi-target direction finding using high-resolution technology in a type of sonar are studied. Mainly include how to use the target radiation noise bandwidth, arc array array elements installed in different directions and inconsistent performance of the calibration method, and the different target source intensity on the algorithm. The research shows that for the high-resolution algorithm of MUSIC class which uses noise subspace to estimate the azimuth, the difference of the target intensities only makes the difference of the height and the height of the angle spectrum. As long as the minimum SNR of each target source is not lower than a certain threshold, Accurately estimate the result. Through the application of broadband focus and error compensation techniques, the proposed algorithm can effectively improve the estimation performance in real environment.