Stability threshold of modulation and demodulation linear methods

This work presents solution for problem of synthesis of linear modulator and demodulator for linear filtered telecommunication channel with additive noise by root-mean-square criterion. We estimated technical effect of derived solutions obtained for case of transmission of one-dimensional two-way amplitude-modulated signal that demonstrated energy gain to widely used modal modulation. According to the obtained results, we have found there is a stability threshold, and mean square deviation grows exponentially for linear methods of modulation beyond it.