无线电工程

在数字信号处理中,数字滤波器是一种被广泛使用的信号处理部件。分析了FIR(有限冲激响应)数字滤波器的结构特征,得到了满足系统要求的数字滤波器设计方法,结合实际工程所要求的数字滤波器指标,利用MATLAB对FIR数字滤波器进行了设计和仿真,并根据FIR数字滤波器输出的幅频特性和相频特性图对滤波器的参数进行调整,从而得到满足性能要求的最佳数字滤波器参数。采用DSP芯片实现所设计的FIR数字滤波器。

In digital signal processing,the digital filter is a widely used signal processing component.In this paper,we firstly analyze the structural feature of FIR (Finite Impulse Response) digital filter and obtain the filter design method which can meet the system requirements.And then we use the MATLAB tools software to design and simulate the FIR digital filter in terms of the digital filter specifications required by engineering.In order to obtain the best filter parameters,we can adjust the filter parameters according to the amplitude-frequency and phase-frequency characteristic output by filter.Finally,the designed FIR digital filter is implemented by using DSP chip.