【作者】 孟凡刚； 曲延滨； 高蕾；

【Author】 Meng Fangang, Qu Yanbin, Gao Lei(Harbin Institute of Technology at Weihai, Weihai 264209, China)

【机构】 哈尔滨工业大学(威海)信息科学与工程学院；

【摘要】 提出了一种新的变步长LMS自适应谐波检测算法,该算法的优点是:根据误差信号的平方及四次方的时间均值估计来调节步长因子,无论是信噪比较高还是较低的待检测信号,其都具有较快的动态响应速度和较小的稳态失调。采用Mat-lab对该算法进行了仿真,仿真结果表明该算法比固定步长LMS自适应滤波算法具有更好的跟踪效果。更多还原

【Abstract】 This paper presents a novel adaptive harmonic detecting algorithm, which has the following good qualities: by using the estimation of square and fourth power of the time-average of error signal to control the updating of the step-size, not only under high signal-to-noise ratio conditions but also low ratio conditions, it can provide a more flexible convergence speed and maladjustment. Simulation using Matlab shows that this algorithm has better tracking effect than the fixed step-size LMS algorithm.更多还原