Dependence of Error Probability on the telegraph Distortion Value

The transmission of messages via non-stationary communication channels is made in conditions of adapting the receiving and transmitting equipment to the communication conditions. Mode of adaptation to communication conditions requires rapid assessment of the communication channel quality. The most obvious criterion for assessing the quality of a non-stationary communication channel is the constantly changing value of the elements error probability in the transmitted message. However, assessing the error probability of message elements requires significant time intervals, which may exceed the time of stationary state of the communication channel. It is known that the error probability of message elements is uniquely related to the value of telegraph distortions. The estimation of the telegraph distortion value requires much less time compared to the time required to estimate the probability of errors. In this case, the indirect estimation of the error probability by the value of the telegraph distortion can be made relatively quickly at an interval that is many times less than the stationary state interval of the communication channel. In this regard, the possibility of indirect estimation of error probability in terms of telegraph distortion is relevant for receiving and transmitting equipment with adaptation to communication conditions.