基于Delta算子的数字滤波器设计

针对高速采样的离散系统能避免传统数字信号处理中的系数表达精度不够及高采样率情况下的数值不稳定，从频谱逼近角度出发引入Delta算子理论并利用连续系统设计方法来设计数字滤波器，该方法适用于不同类型的滤波器设计。在理论分析的基础上对该设计方法进行了阐述和举例，仿真结果验证了该设计方法的有效性。

Design of digital filter based on Delta operator

A novel design method for digital filter was presented using the idea of spectrum approximating. With the introduction of Delta operator theory, the high-speed sampling system was processed like continuous one, which could reduce the error of coefficient precision and improve the performance of digital filter. It is also applicable to different filter type. After theoretical analysis, the method was fully expatiated on, and simulation result validates the method's effectiveness.