信号数字处理中抗混滤波器的技术指标分析及其设计

The Specification Analysis and the Design of the Antialiasing Filter in Signal Digit Processing

本文从信号处理设备对输入信号进行时域和频域数字信号处理的角度,论述了采用抗混滤波器进行抗混滤波的必要性.经论证提出了抗混滤波器的设计指标,进行了切比雪夫抗混滤波器的设计计算.最后对实现的抗混滤波器进行了性能测试,取得了满意结果.

In this paper, the necessity of antialiasing filtering by using antialiasing filter is demonstrated by the theory of digit signal processing of the time domain and frequency domain of input signal in signal processing device. The design specification of antialiasing filter is presented by proof and the design and calculation of Chebyshev antialiasing filter is performed. Finally,the specification of antialiasing filter is tested and the result is satisfactory.