圆阵波束输出的高分辨方位估计

High resolution direction estimation of circular array beam outputs

在研究波束域高分辨 ＭＵＳＩＣ算法的基础上，本文把阵元域 ＷＳＦ算法推广到波束域中。这两种算法对阵列的形式没有限制，可以应用于水声系统中常见的均匀圆阵波束输出。计算机仿真结果表明，对于圆阵波束输出，波束域 ＭＵＳＩＣ算法估计目标方位的性能优于阵元域 ＭＵＳＩＣ算法，而波束域ＷＳＦ算法则保持了阵元域ＷＳＦ算法的最佳方位估计性能。

Based on the study of beam space high resolution MUSIC algorithm, we expand the element space weighted subspace fitting (WSF) algorithm into beam space in this paper. These two algorithms have no constraints on the array shape and they can easily be applied to beam outputs of uniform circular arrays which are often used in underwater systems. Computer simulation results show that the beam space MUSIC algorithm achieves better estimation performance than its counterpart in element space, whilethe beam space WSF algorithm hold the best estimation performance of element space WSF algorithm when applied to the beam outputs of a uniform circular array.