Title :
A new delta operator based IIR lattice filter structure
Author :
Huang, Chaogeng ; Xu, Hong ; Chen, Yanhong ; Song, Hongbo ; Zhang, Jing
Author_Institution :
School of Information, Zhejiang University of Finance & Economics, Hangzhou, 310018, China
Abstract :
Delta operator-based implementation over the conventional shift operator approach has been applied to the direct form based structure, and the satisfactory performance including low roundoff noise gain and low coefficient sensitivity, has been achieved. However, the approach for delta operator has not been applied into the lattice filter structure. In this paper, a novel lattice filter structure is derived based on the delta operator. The expression of roundoff noise gain for the proposed structure is derived. For an Nth order digital filter, the proposed structure requires 5N + 1 multipliers, which yields the same implementation complexity as the normalized lattice structure. A numerical example is presented to demonstrate the performance of the proposed structure.
Keywords :
Complexity theory; Lattices; Noise; Sensitivity; Speech; Speech processing; Lattice filters; delta operator; digital filter structures; finite wordlength; roundoff noise gain;
Conference_Titel :
Digital Signal Processing (DSP), 2015 IEEE International Conference on
Conference_Location :
Singapore, Singapore
DOI :
10.1109/ICDSP.2015.7251327