FPGA Based Design of Artificial Neural Processor Used for Wireless Sensor Network
In this paper,Â a simulation ofÂ artificial intelligent system has been designed for processingÂ the incoming data ofÂ sensorÂ units and then presenting proper decision. The Back-propagation Neural Network BPNN has been used as the proposedÂ intelligent system for this work, whereas the BPNN is considered as a trained network in conjunction with an optimization method for changing the weights and biases of the overall network. The main two features of theÂ BPNN are: high speed processing, and producingÂ lowest Mean-Square-Error MSE ( cost function ) in few iterations. The proposed BPNN has used the linear activation functions 'Satlins' and 'Satline' for the hidden and output layer respectively, and has used the training function 'Traingda' ( which is gradient descent with adaptive learning rate)Â as a powerful learning method. It is worth to mention, that no previous research used these three functions together for such analysis. The MATLAB software package has been used forÂ designing and testing the proposed system. An optimal result has been obtained in this work, where the value ofÂ Mean-Square-Error has reached to zeroÂ Â in 87 epochs, and the real and desired outputs have been fitted. In fact, there isÂ no previous work has reached to this optimal result.Â The proposed BPNN has been implemented in FPGA, which is fast, and low power tool.
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