FPGA Implementation of Morlet Continuous Wavelet Transform for EEG Analysis

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Title FPGA Implementation of Morlet Continuous Wavelet Transform for EEG Analysis
Author Qassim, Yahya Taher; Cutmore, Timothy; James, Daniel Arthur; Rowlands, David Duanne
Publication Title 4th International Conference on Computer and Communication Engineering Proceedings
Editor A.H.M. Zahirul Alam
Year Published 2012
Place of publication United States
Publisher IEEE
Abstract Abstract—this article presents the design and implementation of continuous wavelet transform (CWT) of nonstationary Electroencephalogram (EEG) signals using a Spartan 3AN FPGA. The widely applied Morlet wavelet function was used for obtaining the CWT coefficients. The complex convolutions were executed in Fourier space using simple multipliers. Altium designer was used to import Xilinx FFT core configured in Radix 4. Two VHDL controllers were built to control the FFT core operation (which handles both the FFT-IFFT computations) for the first controller; and the multiplication processes in between for the second one. The results showed that the digital architecture of Morlet wavelet function in Fourier space is very time efficient. By an optimized trade-off between speed and silicon area, the design can produce the wavelet coefficients at all scales of 1024 points EEG signal in approximately 1 msec when it runs at maximum clock speed of 125 MHz.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.iium.edu.my/iccce/12/index.php/home-i
Alternative URI http://dx.doi.org/10.1109/ICCCE.2012.6271152
ISBN 978-1-4673-0479-5
Conference name ICCCE 2012
Location Kuala Lumpur, Malaysia
Date From 2012-07-03
Date To 2012-07-05
URI http://hdl.handle.net/10072/47020
Date Accessioned 2012-09-04
Language en_US
Research Centre Behavioural Basis of Health; Griffith Health Institute
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Circuits and Systems; Signal Processing
Publication Type Conference Publications (Full Written Paper - Refereed)
Publication Type Code e1

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