Copyright © 2005 The Institute of Electronics, Information and Communication Engineers
Special Section on Recent Advances in Circuits and Systems-Part 2 -- Papers -- Neural Networks and Fuzzy Systems |
Applying Spiking Neural Nets to Noise Shaping
1 The authors are with Lehrstuhl Hochparallele VLSI-Systeme und Neuromikroelektronik, University of Technology Dresden, Dresden, Germany. E-mail: mayr{at}iee.et.tu-dresden.de
In recent years, there has been an increased focus on the mechanics of information transmission in spiking neural networks. Especially the Noise Shaping properties of these networks and their similarity to Delta-Sigma Modulators has received a lot of attention. However, very little of the research done in this area has focused on the effect the weights in these networks have on the Noise Shaping properties and on post-processing of the network output signal. This paper concerns itself with the various modes of network operation and beneficial as well as detrimental effects which the systematic generation of network weights can effect. Also, a method for post-processing of the spiking output signal is introduced, bringing the output signal more in line with conventional Delta-Sigma Modulators. Relevancy of this research to industrial application of neural nets as building blocks of oversampled A/D converters is shown. Also, further points of contention are listed, which must be thoroughly researched to add to the above mentioned applicability of spiking neural nets.
Key Words: neural noise shaping, pulse-coupled neural nets, neural net optimization with genetic algorithm, spike pulse processing, spiking neural net analog-digital conversion
Manuscript received September 29, 2004. Manuscript revised February 3, 2005.