FIR滤波器的高速实现

Realization of High Speed for FIR Filter

介绍了一种实现F IR滤波器高速运算的有效方法。该方法在传统的滤波器系数奇偶对称性的基础上,根据系数经SystemV iew软件量化后成比例的特点,利用加法运算来简化卷积中大量繁琐耗时的乘法运算;同时推导出奇偶对称性的运算规律并给出详细运算步骤和计算公式。最后给出该算法分别与仅利用系数对称性、直接卷积两方法相比较的加速比。仿真结果表明,文中所采取的优化措施能够提高信号处理速度。

An effective method for the high speed FIR filter is presented. The method is based on the traditional odd-even symmetry of filter coefficients, and reduces the multiplication in convolution by using the addition and the characteristic of proportional coefficients after quantifiying in the SystemView software. And rules and formulas of the odd-even symmetry are de- duced. Finally, the method is compared with the symmetry of coefficients and the direct convolution. Simulation results indicate that the optimization method can improve the signal processing speed.