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本文介绍了理想低通滤波器的两种滚降形式,并从理论上详细地论证与分析了滚降特性及其脉冲响应的特点。根据分析得出的结论和实际条件,阐述了地震数据采集系统中防假频滤波器某些参数的一般选用原则。
This paper introduces two kinds of roll-off forms of the ideal low-pass filter, and theoretically demonstrates and analyzes the roll-off characteristics and their impulse response characteristics in detail. According to the analysis conclusion and the actual conditions, the general selection principle of some parameters of anti-aliasing filter in seismic data acquisition system is expounded.