摘要
文中介绍一种全双工模拟话密系统的自适应回波抵消器,该抵消器用块修正方法更新横向滤波器的系数。这种方法的收敛性能和计算效率均优于标准的最小梯度算法,且满足国际电报电话咨询委员会(CCITT)建议的回波抵消器要求G.165.
The paper introduces an adaptive echo canceller in full-duplex analog speech secure system.The implementation of the canceller is made possible by using a block-update method to updatethe transversal filter coefficients.The method has advantages in convergence properties and com-putational efficiency over the standard mininum gradient algorithm.It also meets the echo can-celler requirements of the CCITT G.165 recommentlation.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
1991年第4期26-30,共5页
Journal of National University of Defense Technology
关键词
活音加密
模拟通信
回波抵消器
analog communication
adaptive echo canceller
speech secure
