对于声矢量圆阵，比较固定对角加载法（FDL）、加权向量范数约束法（NCCB）两种算法输出信干噪比随快拍数变化。-For acoustic vector circular array, relatively fixed diagonal loading method (FDL), weighted vector norm constraint method (NCCB) two algorithms output SINR with snapshots change.