迭代量化设计定点系数FIR数字滤波器

基于峰值约束最小平方优化标准,提出了一种用于设计线性相位定点系数FIR数字滤波器的新方法.修正了传统多交换算法,使之能在部分系数固定的情况下得到具有浮点精度的其余系数;提出了一个结合该修正多交换算法的迭代量化过程,将所有系数逐一量化成定点精度.设计实例验证了该方法的有效性.

Iterative Quantization for Designing FIR Digital Filter with Fixed - Point Coefficients

A new method for designing linear phase FIR digital filter with fixed-point coefficients based on the peak-constrained least-squares criterion is proposed in this paper.The traditional multiple exchange algorithm is modified to obtain part coefficients with floating point precision when the other are fixed,and the resulted algorithm is combined with an iterative quantization procedure in which all the coefficients are quantized one by one.Design examples verify the validity of the proposed method.