多级并行流水FIR数字滤波器的设计与验证

Design and verification of multilevel parallel pipeline FIR digital filter

在雷达接收、语音图像处理、模式识别、无线通信等领域,数字滤波器已经成为重要组成部分。通过分析和研究FIR数字滤波器的结构特点,结合实际的工程实践需求,设计了一种多级并行流水FIR数字滤波器,并提出了一种精确而又简便的冲击响应系数的量化方法,即基于最小冲击响应系数按等比例量化的方法。这种方法不仅可以根据具体的设计要求随意更改设计位宽,还能保障设计的精度。通过编写Verilog HDL进行了设计实现,Modelsim仿真与Matlab仿真对比结果表明,各项参数均满足设计要求。

The digital filter has become an important part in the radar receiving,voice and image processing,pattern recognition,wireless communication and so on. Based on analysis and research on the structure characteristics of FIR digital filter,a multilevel parallel pipeline FIR digital filter was designed in combination with actual demand of engineering. A precise and simple quantification method of impulse response coefficient is proposed in this paper,that is,the method based on the minimum impulse response coefficient and according to the equal proportion quantification. This method not only can change the designed bit wide at will according to specific design requirements,but also can guarantee the precision of the design. The design was realized by means of Verilog HDL. The results of comparison between Modelsim simulation with Matlab simulation indicate that each parameter meet the design requirements.