色噪声下非均匀线阵的快速方位估计

研究了色噪声下非均匀线阵DOA估计的快速算法。通过合理设置阵元间距,解决了非均匀线阵的空间模糊现象,然后基于转换矩阵法,通过对阵列数据相关矩阵进行预处理,消除了色噪声对方位估计的影响,最后利用线性运算得到噪声子空间,可以大大降低方位估计的运算量。计算机仿真结果证实了该方法不仅运算量小,而且在低信噪比下,分辨性能依然很好。

Rapid DOA estimation for nonuniform linear array in the presence of colored noise fields

A rapid direction of arrival estimation algorithm for nonuniform linear array （NLA） under the circumstance of colored noise is presented. Through intercalating the space between the sensor, the ambiguity of NLA can be overcome. A transform based covariance differencing approach is given and the algorithm can overcome the influence of the colored noise. Finally, using linear algorithm, the noise subspace is achieved, and the computational complexity can be reduced. The computer simulation results show the proposed algorithm not only has lower computational complexity, but also has good performance under the low SNR.