摘要
在分析多级维纳滤波器实现算法的基础上,通过对相关相减算法中的阻塞矩阵进行改进,并利用其前向递推多级分解特性构造出空-时二维干扰子空间,然后结合子空间投影方法,进一步求出空-时抗干扰最优权值。与传统的相关相减结构多级维纳滤波方法(CSS-MSWF)相比,该方法在有限数据精度下,抗干扰性能要优于CSS-MSWF方法,具有更好的可行性和实用性。
Followed by analysis of the algorithms implementing Multistage Wiener Filter(MSWF),we find that the blocking operations,when practically implemented,with limited-precision,in its Correlation Subtraction Structure, does not results in the projection subspace,theoretically orthogonal to the cross-correlation vector.We then accordingly modify the blocking matrix making use of the multistage decomposition structure of the MSWF,based on the correlation subtractive structure,to construct the space-time interferen...
出处
《航空电子技术》
2009年第4期22-26,共5页
Avionics Technology
关键词
多级维纳滤波
阻塞矩阵
子空间投影
空-时处理
multistage Wiener filtering
blocking matrix
subspace projection
space-time processing
