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The mathematical model is proposed for evaluating the noise immunity characteristics of a coherent modem reception in a message transmission system that functions under the influence of unintended interference sources. The developed of a mathematical model takes into account the demodulator synthesis algorithm, decoding methods, effective M-PSK modulations and Reed-Solomon codes in the modem. Integrated expressions are obtained that evaluate the noise immunity characteristics of a modem receive, taking into account the energy performance of the receiver.
Mehdiyeva et al. (Wed,) studied this question.