Evaluator for radio communications centres - decides signal route by choosing path with largest difference between signal and noise

摘要

The evaluator allows route selection to occur both in terms of the path the communications travel to the central station and in terms of the signal-to-noise ratio of any path, i.e. the path with the largest signal to noise ratio is selected. The amplitude of the signal in each path is compared with the noise in that path to produce a difference voltage for each path. The difference voltages from different paths are compared one with another and the path having the largest difference voltage is selected for transmitting the wanted signal.