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论述混迭现象的产生及其影响，进而提出了反混迭技术的两个要点─—采样频牟选择和使用低通滤波器，接着提出了设计低通滤波器的工程方法，最后结合设计实例说明了低通滤波器的设计过程。
Discusses the generation of aliasing phenomenon and its influence, and then puts forward two main points of anti-aliasing technology ─ ─ sampling frequency selection and the use of low-pass filter, and then proposes the design of low-pass filter engineering methods, combined with design examples Describes the design process of low-pass filter.