Noise enhanced propagation

We use noise to extend signal propagation in one- and two-dimensional array s of two-way coupled bistable oscillators. In a numerical model, we sinusoi dally force one end of a chain of noisy oscillators. We record a signal-to- noise ratio at each oscillator. We demonstrate that moderate noise signific antly extends the propagation of the sinusoidal input. Oscillators far from the input, where noise extends the signal, exhibit a classical stochastic resonance. We obtain similar results with two-dimensional arrays. The simpl icity of the model suggests the generality of the phenomenon. [S0031-9007(9 8)07826-0].