基于FPGA的FIR滤波器高效实现

本文针对在FPGA中实现FIR滤波器的关键--乘法运算的高效实现进行研究,首先给出了将乘法转化为查表的DA算法,然后简要介绍整数的CSD表示和我们根据FPGA实现要求改进的最优表示;接着,本文讨论了在离散系数空间得到FIR滤波器系数最优解的混合整数规划方法;最后采用这一方法设计了最优表示离散系数FIR滤波器,通过FPGA仿真验证这一方法是可行的和高效的.

Efficient Implementation of FIR Filter using FPGA

The efficient implementation of multipliers is the key of using FIR filters in FPGA. First, we introduce the Distributed Arithmetic which coverts the multiplications into some look-up operations; second, in this article the CSD representation of integer is introduced, followed by a improved optimum representation according to the FPGA structure; then we present a method that uses mixed integer programming to design the FIR filter in a discrete coefficient space; finally, the implementation of FIR filter in FPGA is discussed, and the result of simulations prove this method is feasible and efficient.