Description: The work gives the results comparative analyses of perspective methods in broad-band modulations. It’s given the description of mathematical model of discrete communication channel. It gives the possibility of signals with cyclic code shift keying at multipath radiowave propagation. The model provides the choice of alphabet type of signal modulation by cyclic code shift keying and parameters of unreflected and reflected beam (amplify and time delay of signal).
Keywords: cyclic code shift keying, multipath radiowave propagation, mathematical model