一种DOA估计新算法及其求根形式

New algorithm for DOA estimation and its root version

由于受到实际中所用阵列孔径的限制,现有DOA算法所能分辨的信源数以及能达到的谱分辨率一直不高。在入射信号具有非圆对称特性的时候,证明可以利用信号的该种特性,对原阵列进行有效的扩展,并且在此基础上提出了一种新的DOA估计算法及其求根形式。指出在相同的条件下,所提出的新算法及其求根形式有着比MUSIC算法更好的DOA估计性能,并且能对更多的信号进行DOA估计。计算机仿真试验进一步证明了这一结论。

Due to the limitation of the aperture of the array in practice, the number of the signals the existing algorithms could handle is not big, so is the spectral resolution. It is proved that the aperture of the array could be expanded under the assumption that the signals are noncircularly symmetric. On this basis a new algorithm for DOA estimation and its root version are proposed. The viewpoint is put forward that the new algorithm and its root version would perform better in estimating DOA than the classical MUSIC under the same conditions and could even handle more signals than the classical one. Computer simulations verify this conclusion in the end.