To investigate this, I used a filter bank to obtain a set of signals locked to the incoming line frequency.
为了研究这一问题，我使用了一个滤波器组，来获得一系列固定在市电频率的信号。
If input sigmal is supwrimpsed with high-frequency noise use a low-pass filter in the input signal line.
若输入信号伴随高频干扰，应在线里用高频过滤器。
An adaptive line enhancer based on the above notch filter extracts the fundamental frequency signal from noisy data.
采用自适应谱线增强器从含有噪声的数据中提取出基频信号。
Then a tapped-line hairpin-filter with the center frequency of 1.
并设计了一个抽头线发夹型带通滤波器，其中心频率为1。
A new fast digital filter of on line eddy current testing system for decreasing the effect of high frequency noise was researched.
针对涡流在线检测系统中的各种高频噪声影响，设计了快速去噪滤波算法。
A new fast digital filter of on line eddy current testing system for decreasing the effect of high frequency noise was researched.
针对涡流在线检测系统中的各种高频噪声影响，设计了快速去噪滤波算法。
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