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Implementation of bit-parallel lattice wave digital filters with increased maximal sample rate
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Electronics System.
Linköping University, Department of Electrical Engineering.ORCID iD: 0000-0003-3470-3911
Linköping University, Department of Electrical Engineering.
Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Electronics System.
2001 (English)In: IEEE international conference on electronics, circuits, and systems,2001, 2001, 1/71- p.Conference paper, Published paper (Refereed)
Abstract [en]

Arithmetic transformations for increased maximal sample rate of bit-parallel lattice wave digital filters implemented with carry-save arithmetic are proposed. The purpose is to increase the throughput in order to allow a reduction of the power consumption through supply voltage scaling. A lattice wave digital filter can be composed of first- and second-order allpass sections which are recursive structures. This sets a bound on the maximal sample rate. The proposed transformations reduce the latency of the critical loop by reordering of arithmetic operations. The resulting structure is numerically equivalent to the original structure. Hence, the favourable properties of lattice wave digital filters, such as guaranteed stability, low coefficient sensitivity, and good dynamic range, are retained. An example of a filter implementation where the proposed transformations are applied is presented. The maximal sample rate for this example was improved by about 40% at the expense of a 10% increase of the area.

Place, publisher, year, edition, pages
2001. 1/71- p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-34495Local ID: 21556OAI: oai:DiVA.org:liu-34495DiVA: diva2:255343
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2015-03-11

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http://ieeexplore.ieee.org/iel5/7591/20704/00957672.pdf?tp=&arnumber=957672&isnumber=20704

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Ohlsson, HenrikGustafsson, OscarJohansson, HåkanWanhammar, Lars

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