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首页> 外文期刊>ETRI journal >Design of M-Channel IIR Uniform DFT Filter Banks Using Recursive Digital Filters
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Design of M-Channel IIR Uniform DFT Filter Banks Using Recursive Digital Filters

机译:使用递归数字滤波器设计M通道IIR均匀DFT滤波器组

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摘要

In this paper, we propose a method for designing a class of M-channel, causal, stable, perfect reconstruction, infinite impulse response (IIR), and parallel uniform discrete Fourier transform (DFT) filter banks. It is based on a previously proposed structure by Martinez et al. [1] for IFR digital filter design for sampling rate reduction. The proposed filter bank has a modular structure and is therefore very well suited for VLSI implementation. Moreover, the current structure is more efficient in terms of computational complexity than the most general IIR DFT filter bank, and this results in a reduced computational complexity by more than 50% in both the critically sampled and oversampled cases. In the polyphase oversampled DFT filter bank case, we get flexible stop-band attenuation, which is also taken care of in the proposed algorithm.
机译:本文提出了一种设计因果关系,因果关系,稳定,完美重构,无限冲激响应(IIR)和并行均匀离散傅里叶变换(DFT)滤波器组的方法。它基于Martinez等人先前提出的结构。 [1]用于IFR数字滤波器设计,以降低采样率。提出的滤波器组具有模块化结构,因此非常适合VLSI实现。而且,就计算复杂度而言,当前结构比最普通的IIR DFT滤波器组更有效,并且在临界采样和过采样情况下,都可将计算复杂度降低50%以上。在多相DFT滤波器组过采样的情况下,我们获得了灵活的阻带衰减,在所提出的算法中也要注意这一点。

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