We consider the problem of optimizing signal transmission through
multi-channel noisy devices. We investigate an array of bithreshold noisy
devices which are connected in parallel and convergent on a summing center.
Utilizing the concept of noise-induced linearization we derive an analytical
approximation of the normalized power norm and clarify the relation between the
optimum threshold and the standard deviation of noises. We show that the
optimum threshold value is 0.63 times the standard deviation of the noises.
This relation is applicable to both subthreshold and suprathreshold inputs.Comment: 14 pages, 6 figure