摘要
通过增加误差信号的自相关值对步长变化的影响,对一种变步长LMS算法进行进一步改进,既继承了前者稳态性能好的优点,又增强了算法跟踪信道变化的能力,具有较好的抗干扰性能,而且收敛速度加快,收敛时间变短。这种算法不仅可应用于跟踪信道特性变化较快的信道(如短波通信),而且也非常适用于算法收敛速度和稳定性要求较高的情况。
By means of the effect of autocorrelation characteristic of output error signal on the step- size variable, further improvement on a variable step - size LMS algorithm is made in this paper. The modified algorithm maintains the advantage of the original one which has good stability,enhances capability of tracking the channel change,and makes the speed of convergence faster. It is not only can be used in the case of tracking the channel characteristic quick changes （such as shortwave communication）, but also can be fit for the situations that need fast convergence speed and good stability.
出处
《现代电子技术》
2006年第20期110-112,共3页
Modern Electronics Technique
关键词
LMS算法
变步长
自相关
稳定性
收敛速度
LMS algorithm
variable step - size
autocorrelation
stabilityq convergence speed
