On the Design of Highly Accurate and Efficient IIR and FIR Filters
On the Design of Highly Accurate and Efficient IIR and FIR Filters
复制标题
高精度高效IIR和FIR滤波器的设计
DOI:
--
复制
发表时间:
2012
影响因子:
5.4
通讯作者:
Lucas Monzón
中科院分区:
文献类型:
--
作者:
G. Beylkin;Ryan D. Lewis;Lucas Monzón
We describe a systematic method for designing highly accurate and efficient infinite impulse response (IIR) and finite impulse response (FIR) filters given their specifications. In our approach, we first meet the specifications by constructing an IIR filter with, possibly, a large number of poles. We then construct, for any given accuracy, an optimal IIR version of such filter (with a minimal number of poles). Finally, also for any given accuracy, we convert the IIR filter to an efficient FIR filter cascade (either serial or parallel). Since in this FIR approximation the non-causal part of the IIR filter only introduces an additional delay (as a function of the desired accuracy), our IIR construction does not have to enforce causality. Thus, we obtain a simple method for constructing linear phase filters if the specifications so require. All of these procedures are accomplished via robust, fast algorithms. We provide several illustrative examples of our method.