FIR滤波器快速实现算法的最佳设计

Optimum design of the fast implementation algorithm of the FIR filter

针对实时信号处理中长阶数FIR滤波器运算量大的特点,分析并比较了包括快速算法在内的多种实现方法的性能,提出了不同方法的选择准则,得出了频域分段滤波方法中的最佳分段长度与系数阶数的关系,显著降低了连续信号FIR滤波的运算量。并提出利用代价函数,综合考虑最佳设计中的吞吐率和处理迟延。

In consideration of the large amount of computation of the long stage FIR filter in real-time signal processing,the performances of several FIR filter implementation approaches including the fast algorithm are analyzed and compared.The criterion for selecting these approaches is developed,and the relation between the optimum segment length and the coefficient stages in segment filtering of frequenc domain is given.The amount of computation of making FIR filtering over continuous signals is remarkably lowered.The cost function is put forward to synthetically consider the throughput and delay in the optimum design .