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ONLINE ESTIMATION OF TIME-VARYING FREQUENCY OF A SINUSOIDAL SIGNAL ?

机译:正弦信号时变频率的在线估计

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We consider the problem of estimation of a (linearly) time-varying frequency of a sinusoidal signal with unknown phase and magnitude. Such a problem may arise in control design for optical telescopes that makes it interesting from the practical point of view. The existing methods typically use unbounded functions of time that, being multiplying by the input signal, may yield significant noise amplification and poor estimation performance. In contrast, we present a novel approach to the estimation of the linearly varying frequency based on iterative filtering yielding simple linear regression model with a scalar parameter. Illustrative numerical simulations support the theoretical results. We also present a comparison with other known methods.
机译:我们考虑估计相位和幅度未知的正弦信号的(线性)时变频率的问题。从实用的角度来看,在光学望远镜的控制设计中可能会出现这样的问题,这使其变得很有趣。现有方法通常使用时间的无穷函数,该函数与输入信号相乘可能会产生明显的噪声放大和较差的估计性能。相比之下,我们提出了一种基于迭代滤波的线性变化频率估计的新颖方法,可产生带有标量参数的简单线性回归模型。说明性的数值模拟支持了理论结果。我们还提出了与其他已知方法的比较。

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