摘要: |
为解决改进的基于Sigmoid函数变步长最小均方(GSVSLMS)算法步长更新公式易受
噪声干扰的问题,根据高斯白噪声的零均值特性,对GSVSLMS算法进行改进,提出基于零
均值特性的改进GSVSLMS算法,使算法的抗噪声干扰能力明显增强。理论分析和仿真结果
表明:若两算法选取相同参数α、β,则基于零均值特性的改进GSVSLMS算法相
对于GSVSLMS算法具有小的稳态误差;在保证算法收敛的条件下,基于零均值特性的改进G
SVSLMS算法相对于GSVSLMS算法具有较快的收敛速度。 |
关键词: 信号处理 噪声抑制 G SVSLMS算法 零均值特性 稳态误差 收敛速度 |
DOI: |
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基金项目: |
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Improved G-SVSLMS algorithm based on zero mean characteristics |
LU Cui-hua,XIE Xin,ZHOU Hong-mei |
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Abstract: |
The GSVSLMS algorithm′s stepformula can be disturbed easily by nois
e jamming. According to the characteristics that the mean of white Gaussian nois
e is zero, improved GSVSLMS algorithm based on zero mean characteristics is pu
t forward in order to improved GSVSLMS algorithm′s ability of antinoise. If
two algorithms choose the same parameters α,β, improved GSVSLMS al
gorithm will have less steadystate error than GSVSLMS algorithm. Under the c
ondition that the two algorithms are convergent, the convergence rate of improve
d GSVSLMS algorithm is bigger than that of GSVSLMS algorithm
. Improved GSVSLMS algorithm′s performance is testified through theoretica
l analysis and simulation. |
Key words: signal processing noise suppression G SVSLMS algorithm characteristic of zero
mean steady state error convergence rate |