中文说明：经典的高分辨空间DOA估计算法，如MUISC算法，都是在理想情况下能有精确的测量特性，但是在实际环境中常常会遇到相关信号的问题。由于实际环境的影响，一个信号可能与其他反射信号相互相关，因而造成测向模糊。前空间平滑，后空间平滑算法，以及前后空间平滑算法都是去相关的传统算法，能够在一定程度上有效地去除信号之间的相关性。
English Description：
Classic space high resolution DOA estimation algorithms, MUISC algorithm is ideally to have accurate measurement characteristics, but in the real world often encounter signal problems. Due to the actual environmental impact, a signal may be associated with other signals are, thus resulting in direction blur. Spatial smoothing before, spatial smoothing algorithm, and spatial smoothing algorithm to the before and after of our traditions that can effectively remove the correlation between signal to a certain extent.