Multilayer Neural Network with Threshold Neurons

Hiroomi HIKAWA  Kazuo SATO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E81-A   No.6   pp.1105-1112
Publication Date: 1998/06/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section of Papers Selected from ITC-CSCC'97)
Category: Neural Networks
multilayer neural network,  back-propagation,  FPGA hardware,  

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In this paper, a new architecture of Multilayer Neural Network (MNN) with on-chip learning for effective hardware implementation is proposed. To reduce the circuit size, threshold function is used as neuron's activating function and simplified back-propagation algorithm is employed to provide on-chip learning capability. The derivative of the activating function is modified to improve the rate of successful learning. The learning performance of the proposed architecture is tested by system-level simulations. Simulation results show that the modified derivative function improves the rate of successful learning and that the proposed MNN has a good generalization capability. Furthermore, the proposed architecture is implemented on field programmable gate array (FPGA). Logic-level simulation and preliminary experiment are conducted to test the on-chip learning mechanism.