基于System Generator的FIR数字滤波器的设计与实现

摘要

In the realm of software radio,the module often used is digital filter.Digital filters are made by digital multipliers,adders and delay units composed of an algorithm or device.Digital filter function is the discrete signal input digital signal processing operations in order to achieve the purpose of changing the signal spectrum.This article uses the Matlab System Generator under the sine wave signal generation, and adding Gaussian white noise,the signal is filtered through a variety of digital filters,then download System Generator to generate the FPGA,the signal output through the DA,the last observed in the output waveform on the oscilloscope.%数字滤波器的功能是对输入离散的数字信号进行运算处理，以达到改变信号频谱的目的。System Generator是基于定点的仿真系统。的本设计内容全部基于System Generator。首先由DDS（Direct Digital Synthesizer数字信号发生器）生成正弦波信号，之后加入高斯白噪声，将信号通过两种结构的数字滤波器进行滤波，随后将程序下载至FPGA中，通过DA将信号输出，最后在比较两种滤波器的在硬件平台上的实际性能以及消耗资源情况。