非均匀天线阵的超分辨测向

Direction of arrival estimation on non-uniformly spaced arrays

提出了一种基于非均匀天线阵的超分辨测向算法 .该算法利用了数字波束形成技术 (DBF) ,因而设备简单 ,适应性强 .为实现超分辨测向 ,算法基于Gram -Schmidt正交 (GSO)网络 ,将干扰对消的原理用于信号的方向自适应定位 .算法可同时估计波达方向及信源个数 ,不需预先知道或估计信源数 ,而且算法简单 ,便于硬件实现 .仿真结果表明 ,算法可实现超分辨测向 ,而且在一定条件下 ,测向精度及分辨率优于MUSIC算法 .

Using Digital beam forming (DBF) to enable a simple device to have good adaptability and the gram schmidt orthogonalization (GSO) array with non uniformly spaced array the algorithm with adaptive cancellation of interference can estimate the direction of arrival and the number of signal sources without knowing or estimating the number of signal sources before estimating the DOA by other methods. Simulation results show this algorithm can improve the resolution of DOA estimation and, in some cases, its precision and resolution of DOA estimation are better than MUSIC algorithm.