Sandro A. P. Haddad, Wouter A. Serdijn (auth.)9781402090721, 1402090722
Ultra Low-Power Biomedical Signal Processing describes signal processing methodologies and analog integrated circuit techniques for low-power biomedical systems. Physiological signals, such as the electrocardiogram (ECG), the electrocorticogram (ECoG), the electroencephalogram (EEG) and the electromyogram (EMG) are mostly non-stationary. The main difficulty in dealing with biomedical signal processing is that the information of interest is often a combination of features that are well localized temporally (e.g., spikes) and others that are more diffuse (e.g., small oscillations). This requires the use of analysis methods sufficiently versatile to handle events that can be at opposite extremes in terms of their time-frequency localization.
Wavelet Transform (WT) has been extensively used in biomedical signal processing, mainly due to the versatility of the wavelet tools. The WT has been shown to be a very efficient tool for local analysis of non-stationary and fast transient signals due to its good estimation of time and frequency (scale) localizations. Being a multi-scale analysis technique, it offers the possibility of selective noise filtering and reliable parameter estimation.
Often WT systems employ the discrete wavelet transform, implemented on a digital signal processor. However, in ultra low-power applications such as biomedical implantable devices, it is not suitable to implement the WT by means of digital circuitry due to the relatively high power consumption associated with the required A/D converter. Low-power analog realization of the wavelet transform enables its application in vivo, e.g. in pacemakers, where the wavelet transform provides a means to extremely reliable cardiac signal detection.
In Ultra Low-Power Biomedical Signal Processing we present a novel method for implementing signal processing based on WT in an analog way. The methodology presented focuses on the development of ultra low-power analog integrated circuits that implement the required signal processing, taking into account the limitations imposed by an implantable device.
Table of contents :
Front Matter….Pages i-x
Introduction….Pages 1-12
The Evolution of Pacemakers: An Electronics Perspective….Pages 13-31
Wavelet versus Fourier Analysis….Pages 33-50
Analog Wavelet Filters: The Need for Approximation….Pages 51-74
Optimal State Space Descriptions….Pages 75-94
Ultra Low-Power Integrator Designs….Pages 95-130
Ultra Low-Power Biomedical System Designs….Pages 131-172
Conclusions and Future Research….Pages 173-177
Back Matter….Pages 179-215
Reviews
There are no reviews yet.