一种优化非均匀阵列天线测向性能的方法

A Method to Improve the Performance of Estimating Direction-of-Arrival in Nonuniform Linear Antenna Array

本论文给出了一种新的优化非均匀天线阵列阵元排布的方法阵元微调法。非均匀阵列天线具有许多均匀阵列天线不具备的优点,可以在节省设备量的同时增加天线孔径,但是利用非均匀阵列天线测向时也容易产生估计模糊。解决非均匀阵列天线估计模糊问题的途径之一就是调整天线阵列的排布。计算机仿真证实,经过微调法优化的非均匀阵列的测向性能有很大改善。

This paper presents a new arrangement method for the nonuniform linear array(NLA), which is called elements perturbation, to improve the performance in estimating Direction-of-Arrival(DOA). Nonuniform linear antenna array has many advantages compared with uniform linear antenna array. It can not only reduce the number of equipment, but also increase the antenna aperture. However, estimation of direction-of -arrival with nonuniform linear antenna array may cause ambiguities. One method to avoid the ambiguities is to adjust the design of array geometry. It can be proved by computer simulation that there is great improvement in estimating DOA by element perturbation of nonuniform linear antenna array.