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Multiplierless Unity-Gain SDF FFTs
Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, The Institute of Technology.
Tampere University of Technology, Finland.
Linköping University, Department of Electrical Engineering, Computer Engineering. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-3470-3911
2016 (English)In: IEEE Transactions on Very Large Scale Integration (vlsi) Systems, ISSN 1063-8210, E-ISSN 1557-9999, Vol. 24, no 9, 3003-3007 p.Article in journal (Refereed) Published
Abstract [en]

In this brief, we propose a novel approach to implement multiplierless unity-gain single-delay feedback fast Fourier transforms (FFTs). Previous methods achieve unity-gain FFTs by using either complex multipliers or nonunity-gain rotators with additional scaling compensation. Conversely, this brief proposes unity-gain FFTs without compensation circuits, even when using nonunity-gain rotators. This is achieved by a joint design of rotators, so that the entire FFT is scaled by a power of two, which is then shifted to unity. This reduces the amount of hardware resources of the FFT architecture, while having high accuracy in the calculations. The proposed approach can be applied to any FFT size, and various designs for different FFT sizes are presented.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC , 2016. Vol. 24, no 9, 3003-3007 p.
Keyword [en]
Combined coefficient selection and shift-and-add implementation (CCSSI); coordinate rotation digital computer (CORDIC); fast Fourier transform (FFT); multiplierless; pipelined architecture; single-delay feedback (SDF); unity gain
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-132483DOI: 10.1109/TVLSI.2016.2542583ISI: 000384983900018OAI: oai:DiVA.org:liu-132483DiVA: diva2:1046263
Note

Funding Agencies|Swedish ELLIIT Program

Available from: 2016-11-13 Created: 2016-11-12 Last updated: 2016-12-05

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Garrido Gálvez, MarioAndersson, RikardGustafsson, Oscar
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Computer EngineeringFaculty of Science & EngineeringVehicular SystemsThe Institute of Technology
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