Abstract
In the conventional recursive least square (RLS) algorithm for multilayer feedforward neural networks, controlling the initial error covariance matrix can limit weight magnitude. However, the weight decay effect decreases linearly as the number of learning epochs increases. Although we can modify the original RLS algorithm to maintain a constant weight decay effect, the computational and space complexities of the modified RLS algorithm are very high. This paper first presents a set of more compact RLS equations for this modified RLS algorithm. Afterwards, to reduce the computational and space complexities, we propose a decoupled version for this algorithm. The effectiveness of this decoupled algorithm is demonstrated by computer simulations.
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