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滤波是抑制和防止干扰的一项重要措施,它可以显著地减小干扰的电平,因为干扰频谱成分不等于有用信号的频率,滤波器对于这些与有用信号频率不同的成分有良好的抑制能力。
Filtering is an important measure to suppress and prevent interference. It can significantly reduce the interference level because the interference spectrum does not equal the frequency of the useful signal, and the filter has a good ability to suppress these components with different frequencies from the useful signal .