Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Noise Immunity of Modem in Noise Channel at Reception of Signal With Tikhon Distribution E.D. BYCHKOV, Y.M. VESHKURTSEV, D.A. TITOV For the known modem, a new algorithm for modulation of a quasi-merministic signal with a distribution according to Tikhonov's law has been proposed. The noise immunity of a modem with a new modulation algorithm in a channel with "white" noise has been studied. It is established that the noise stability of the modem increased by 10 dB (at the level of the probability of mistakes 1∙10–12) in comparison with the prototype accepting signals with phase modulation. In addition, a modem with a new modulation algorithm has an error probability several orders of magnitude smaller than its analogue with the modulation algorithm published earlier. Keywords: modem, Tikhonov law, noise immunity, signal-to-noise ratio. DOI: 10.25791/pribor.03.2020.1161 Pp. 38-43.