NDLI: Structure-variant transformation for reducing the roundoff noise in block parallel digital filters

Content Provider	IEEE Xplore Digital Library
Author	Gaida, M. Koeberle, M. Lueder, E.
Copyright Year	1994
Description	Author affiliation: Inst. fur Netzwerk und Systemtheor., Stuttgart Univ., Germany (Gaida, M.; Koeberle, M.; Lueder, E.)
Abstract	Linear matrix transformation is applied to flow graph matrices of block digital filters to improve roundoff noise behaviour and to enhance the dynamic range. This is done in two main steps: First a structure-variant transformation is performed, i.e. the topology of the filter is changed, so that the input nodes become pure branching nodes and the output nodes become pure adding nodes. Besides that, the scaling multipliers can be abolished through this step. In the second step a structure-invariant transformation is applied which does not change the topology any more but changes the multiplier values to perform a further noise reduction. As an example a second order block digital filter with two inputs and two outputs is used, for which the roundoff noise could be improved from about 39 dB to 21 dB. At the same time the dynamic range at the outputs was enhanced by about 18 dB.<>
Starting Page	465
Ending Page	468
File Size	273558
Page Count	4
File Format	PDF
ISBN	078031915X
DOI	10.1109/ISCAS.1994.409003
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-05-30
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Noise reduction Digital filters Equations Dynamic range Topology Transfer functions Flow graphs Delay Turning Integrated circuit noise
Content Type	Text
Resource Type	Article

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