最小冗余线阵的DOA估计

A Study on DOA Estimation of Minimum-Redundancy Linear Arrays

波达方向(DOA)估计是智能天线技术研究热点之一。研究了最小冗余线阵的DOA估计问题。通过引入阵列冗余度,对非均匀线阵的阵元配置进行研究,在对MU S IC算法进行分析的基础上,利用M atlab对最小冗余线阵的DOA性能进行仿真,通过与均匀线阵进行对比,结果表明,在相同阵元数目的前提下,最小冗余线阵获得了较高的空间谱分辨力和较低的估计均方误差,提高了DOA估计性能。

DOA estimation is a heat point in the smart antenna technology research. In the paper, DOA estimation based on minimum-redundancy linear arrays is researched. Array redundancy is introduced into Non-Uniformity Linear Array （NULA）,and the NULA＇s array configure is studied. Based on the analysis of MUSIC arithmetic, the DOA performance of minimum-redundancy linear arrays is simulated by using Matlab. The DOA performance of minimum-redundancy linear arrays with that of UI.A （Nniformity Linear Array） are compared by experiments. It is shown that, on condition of the same number arrays, minimum-redundancy linear arrays has better quality of spectrum resolution and lower estimates meansquare error, and the performance of DOA estimation is enhanced.