基于平面圆阵的二维测向精度分析

文中分析了基于平面圆阵的MUSIC算法对非相关信号源进行二维DOA估计的测向精度。推导了基于平面圆阵的二维DOA估计精度的公式。并通过计算机的仿真验证了模型的有效性，仿真结果说明了在一定的约束条件下，测向的精度与信号波长和平面圆半径之比、分布于平面圆上阵元的个数及入射信号入射到天线阵的角度都有关系，并给出了相应的曲线。

DOA Estimation of Non-correlated Signals by MUSIC Algorithm

In this article, the MUSIC based on plane circular antenna array was analyzed, what was used at estimation of two dimensional DOA. At the same time, the precision of DOA estimation formula was given and the formula was proved correct by computer simulation. So the antenna array was in effect. From the formulas, it could be seen that the precision of DOA estimation was related with many factors. The results of simulation demonstrated that, at some conditions, the precision is affected by the effect of the data of wavelength to radius of the circularity and the direction of arrival signals.