一种基于平行基线的稳健圆阵干涉仪测向算法

A Robust Direction Finding Algorithm Based on Parallel Baselines for Circular Array Phase Interferometer

在很多现实环境中，多径信号广泛存在。强多径信号将严重影响相位干涉仪的性能。文章提出了一种基于圆阵的稳健相位干涉仪测向算法。由于圆阵的圆对称性，使得平行基线的存在。利用相同长度平行基线相位差的平均，能一定程度的减小多径信号对测角的影响。并利用平行基线解长基线模糊。最后通过多条不同指向的长基线，采用最小二乘方法进行测角，从而提高测角精度。本文算法通过数值仿真得到了验证。

In many real world applications, multipath signals widely exist. Strong multipath signal will worsen the performance of the interferometer. In this paper, a robust direction find- ing algorithm for circular array phase interferometer is proposed. Due to the circular symmetry of the circular array, there are many parallel baselines. The proposed algorithm uses the paral- lel baselines with the same length to lessen the effect of multipath, and apply the parallel base- lines to the solution of the ambiguity. In the end, several baselines with the same length and different orientations are applied to calculate the direction of arrival by using least square. Fi- nally, the validity of this method is demonstrated with examples.