对变步长LMS滤波算法进行研究，提出一种新的变步长LMS自适应滤波算法。该算法基于Sigmoid函数，通过引入误差因子反馈来调整函数参数，解决了类Sigmoid函数中参数设置的问题，并使算法具有较快的收敛速度和较小的稳态误差。计算机仿真表明，相对于其他变步长算法，该算法在收敛速度和稳态误差方面均表现优异，具有较好适用性。% By studying variable step⁃size LMS algorithms,a novel variable step⁃size LMS algorithm is proposed. The algo⁃rithm based on Sigmoid function adjusts the function parameters through the introduction of feedback of error factor and solves the problem of parameter setting in generic Sigmoid function. The algorithm has a faster convergence rate and a small steady⁃state error. Simulation results show that,compared with other algorithms,the algorithm is more perfect in convergence rate and steady⁃state error,and has a better applicability.
展开▼
