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
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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。
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关键词:
- 自适应信号处理; LMS算法; 收敛因子
Abstract: 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. -
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