Possibility of increasing the data transmission rate in the presence of destabilizing factors in communication systems using symbols with mutual interference

The paper considers the possibility, due to the use of «transparency windows», of an increase in the information transfer rate in radio communication systems using multi-position phase-manipulated signals with n discrete states that function with intersymbol distortions caused by linear selective systems in radio path. The stability of «transparency windows» under the influence of destabilizing factors (frequency detuning and phase measurement errors) is estimated. Recommendations on the use of «transparency windows» are presented.