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Linear Time- Invariant Systems
Finding an Impulse Response from Signals
Description
Deconvolution is a method for finding a system’s impulse response from known input and output signals. It is also called inverse filtering. This technique is useful when the system’s characteristics are not known directly and must be inferred from the signals that can be observed.
One common way ...
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Transcript
系统的脉冲响应可用于通过输入信号和脉冲响应卷积来确定输出响应。
在给定输入信号和输出的情况下,获取此脉冲响应称为反卷积或逆滤波。这是在卷积和中获得一个组成信号的过程。
给定一个输入信号和一个输出响应,可以使用多项式除法或递归算法方法执行反卷积,以产生脉冲响应。
在多项式除法中,序列被视为降序多项式的系数。然后执行长除法以获得脉冲响应。
在递归算法方法中,输出响应最初定义为卷积和,可以表述为递归算法。通过将变量 n 设置为零来简化方程,从而获得 n 的正值的脉冲响应。
脉冲响应所需的求值次数是通过将信号长度代入给定的关系来确定的。为获得的数字计算最终脉冲响应值。
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