An analog neural network implementation in fixed time of adjustable-order statistic filters and applications

In this paper, we show a neural network implementation in fixed time of adjustable order statistic filters, including sorting, and adaptive-order statistic filters. All these networks accept an array of N numbers X/sub i/=S/sub Xi/M/sub Xi/2/sup EXi/ as input (where S/sub Xi/ is the sign of X/sub i/, M/sub Xi/ is the mantissa normalized to m digits, and Ex is the exponent) and employ two kinds of neurons, the linear and the threshold-logic neurons, with only integer weights (most of the weights being just +1 or -1) and integer threshold. Therefore, this will greatly facilitate the actual hardware implementation of the proposed neural networks using currently available very large scale integration technology. An application of using minimum filter in implementing a special neural network model neural network classifier (NNC) is given. With a classification problem of l classes C/sub 1/,C/sub 2/,...,C/sub 1/, NNC classifies in fixed time an unknown vector to one class using a minimum-distance classification technique.