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本文详述利用反卷积(反滤波)方法由已知的输出波形重建系统的输入波形的技术,它可使受系统有限带宽影响而畸变了的波形得到某些恢复,从而大大提高了测量系统的分辨能力。在用带有噪声的信号进行反卷积时,没有严格的解,必须采用滤波器方能得到稳定、平滑的估计解。本文分析了一种自动调节的数字滤波器,并介绍了进行这种处理的程序框图。文中给出了求取长同轴电缆和冲击力标准系统的原始输入波形的两个实例。
This article details the technique of using the deconvolution (inverse filter) method to reconstruct the input waveform of a system from the known output waveform, which allows some recovery of the distorted waveform affected by the limited bandwidth of the system, thereby greatly improving the accuracy of the measurement system Resolution ability. There is no strict solution to deconvolution with a noisy signal. A filter must be used to obtain a stable and smooth estimated solution. This article analyzes an auto-tuning digital filter, and introduces the block diagram of this process. Two examples of original input waveforms for a long coaxial cable and impact standard system are given.