约束和非约束频域分组LMS自适应滤波器的快速算法  

FAST ALGORITHMS FOR THE CONSTRAINED AND UNCONSTRAINED FREQUENCY DOMAIN BLOCK-LMS ADAPTIVE FILTERS

作　　者：何汉翔[1] 尹俊勋[1] 欧阳景正[1] 

机构地区：[1]华南理工大学电子与通信工程系,广州510641

出　　处：《电子科学学刊》1998年第4期480-485,共6页

摘　　要：本文通过将约束和非约束频域分组LMS算法的权值迭代方程转换成时域方程,利用最小二乘法(LS)分别选取最优时变步长收敛因子,得到频域最佳分组算法(FOBA)和非约束频域最佳分组算法(UFOBA),虽然增加了计算量,但计算机仿真结果表明:提高了收敛速度和精度,算法稳定可靠。In this paper, the updating equations of FBLMS and UFBLMS algorithms are transformed into the time domain, then two algorithms(FOBA and UFOBA) are presented by employing time-varying convergence factors which are optimized in a least-square(LS) sense respectively. Although FOBA and UFOBA algorithms require a relatively modest increase in computation for each block iteration compared to FBLMS and UFBLMS algorithms respectively, it is shown by simulations that these-algorithms improve convergence speed and accucary of adaptation.

关 键 词：自适应信号处理 LMS算法 收敛因子 

分 类 号：TN911.7[电子电信—通信与信息系统]