基于DSP Builder和FPGA的IIR滤波器设计

IIR Filters Design Based on DSP Builder and FPGA

针对传统的基于现场可编程门阵列(FPGA)的数字滤波器设计所需周期长,提出了基于dsp builder和FPGA的滤波器设计,完全实现自顶向下的设计流程。在此基础上设计实现四节级联IIR,并结合MATLAB强大计算功能,提出了利用MATLAB和Quartus II联合仿真算法;使输出复杂的数据变为波形,易于观察仿真结果,增强了Quartus的仿真功能。结果表明设计的IIR滤波器完全达到设计要求。

To overcome the long cycle in digital filter design based on FPGA,a top-down design method based on DSP builder and FPGA is proposed,with which a 4-order cascade IIR filter is designed.With the strong calculation capacity of Matlab,a simulation method in combination of MATLAB with Quartus II is proposed.By converting the complex data to waveform,the simulation result becomes easier for observation,the simulation function of Quartus II is also enhanced.The results show that the IIR digital filter can fully meet the design requirement.