摘要
提出了一种在FPGA中以整数方式实现IIR滤波器的方法,讨论了取整舍入误差对IIR滤波器的稳定性影响,针对df2形式及FPGA迭代运算提出以变量T的传函增益限定输入信号范围的方法,使得IIR滤波器在FPGA中稳定运行;最后给出编程方法。通过实验验证,该方法设计的IIR滤波器收敛,具有广泛的工程应用。
A Method of realization of IIR filter based on integer on FPGA is put forward in this paper, and the effect to stability of IIR filter by rounding error is discussed, to dr2 format and the operation of superposition on FPGA, a method of limit the range of inputting signal is put forward, making IIR filter runs steadily on FPGA, finally, detailed design of program is given. Experiment has proved, IIR filter implemented by this method is convergent, and it is applied extensively.
出处
《微计算机信息》
北大核心
2007年第35期220-222,共3页
Control & Automation