Sensitivity analysis of a novel digital filter structure

Authors:
Chaogeng Huang;Gang Li;Hong Xu
Affiliations:
College of Information Engineering, Zhejiang University of Technology, Hangzhou, P.R. China;College of Information Engineering, Zhejiang University of Technology, Hangzhou, P.R. China;College of Information Engineering, Zhejiang University of Technology, Hangzhou, P.R. China
Venue:
ICICS'09 Proceedings of the 7th international conference on Information, communications and signal processing
Year:
2009

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Abstract

In this paper, a novel structure is derived for digital filter which is robust against the FWL errors. This structure, denoted as SIMP, is actually an improved version of the one reported in [11] in terms of implementation efficiency and reducing quantization errors. The expression of transfer function sensitivity measure is derived for each structure. Two numerical examples are presented in order to demonstrate the performance of the proposed structure comparing with the transposed direct-form II structure SDFIIt, the structure SLGS in [11], and two well known state-space realizations SORTH, SOPT. It is shown that SIMP is lower sensitivity than SLGS and much simpler than SORTH and SOPT structure.