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Non-parametric Vertical Box Algorithm for Detecting Amplitude Information in the Received Digital Signal

Vertical boxes algorithm (VBA) for non-cooperative automatic discrimination between digital signals with amplitude information (AI) from those without AI is presented. The problem is not new and several solutions have been proposed. Unlike them VBA needs no information about propagation conditions and the received signal parameters. No SNR and noise distribution assumptions are made, no carrier frequency and no thresholds are required. The only assumption made is the symbol rate interval which may be as wide as desired. The signal is considered only in the time domain. VBA also distinguishes between some other classes of signals.