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针对传统方法估计系统幅频特性不精确的缺点，提出一种新的相关平均估计方法．采用几种方法对一个二阶模拟滤波器的幅频特性估计进行了仿真，证明所提方法是有效的．
In view of the shortcomings of the traditional method to estimate the amplitude-frequency characteristic of the system inaccuracy, a new correlation average estimation method is proposed. Several methods are used to simulate the amplitude-frequency characteristic estimation of a second-order analog filter, which proves that the proposed method is effective.