一种低复杂度的仿射投影算法  

A Low-Complexity Affine Projection Algorithm

作　　者：杨海斌[1] Yang Haibin(Hunan Vocational Institute of Technology,Xiangtan 411004)

机构地区：[1]湖南理工职业技术学院,湘潭411004

出　　处：《现代计算机》2022年第1期75-78,共4页Modern Computer

基　　金：湖南省教育厅项目研究课题:自适应滤波器权系数简化更新策略研究(湘教通[2019]353号,课题编号19C0876)。

摘　　要：本文利用回声信道的稀疏性和集员滤波技术提出了一种适用于回声消除的低复杂度仿射投影算法。所提算法通过定义一个丢弃函数忽略接近零的系数自适应更新,以降低计算代价,当系数更新误差小于预定门限时,利用集员滤波策略避免了新的更新,从而进一步降低了计算量。仿真结果表明,新算法与仿射投影算法相比具有相似的性能,但所提出的算法计算代价更低,与最新的低复杂度回声消除算法相比具有更快的收敛速度。In this paper,a low-complexity set-membership affine projection algorithm for echo cancellation to exploit the sparsity of an unknown system is proposed.For this purpose,in the provided algorithm,we employ a function called the discard function to the adaptive coefficients in order to neglect the coefficients close to zero in the update process.Moreover,we also use the set-membership filtering technique to avoid new update when the error is greater than the pre-determined upper bound.Numerical results present similar performance of the proposed algorithm when comparing them with affine projection algorithm,whereas the proposed algorithms need lower computational cost.

关 键 词：回声消除 仿射投影算法 丢弃函数 集员滤波 

分 类 号：TN911.7[电子电信—通信与信息系统]