利用阵列几何设置改善方位估计

Performance Improvement in Estimating Direction of Arrival by Array Geometry Arrangement

本文研究了在非等距线阵情况下用空间平滑 Ｍ Ｕ Ｓ Ｉ Ｃ 方法实现方位估计的问题，提出了一种改善方位估计性能的阵列设置方法———即间距组合法．在阵元数一定的情况下，该方法可使阵列的方位分辨率较之均匀线阵（ Ｕ Ｌ Ａ） 有较大的改善，而且还克服了一般稀布线阵方位估计模糊和去相关能力差的缺点，成功地将空间平滑 Ｍ Ｕ Ｓ Ｉ Ｃ这一经典方法用于非等矩阵．

This paper presents a simple method of the direction of arrival (DOA) estimation for the nonuniform linear array,which uses the spatial smoothing MUSIC technique.In the case of the same sensor number,this method which adopts appropriate array geometry arrangement can improve the resolvability of DOA estimation more obviously than the uniform linear array.It also overcomes the shortcoming of the ambiguity of DOA estimation and the poor quality of de correlation in the conventional nonuniform linear array.