Method for Detecting And Compensating For Interference in Radio Control Channels of Robotic Devices Using Frequency-Shift Keying Signals

The article discusses a method for recovering frequency-shift keying signals susceptible to structural interference. The conditions under which frequency shift keying signals are used in radio engineering are considered. Their choice as control signals is substantiated and reasoned. It is shown how, as a result of structural interference, significant changes occur in the shape of the envelope function of the amplitude values of FSK signals. In addition, the angular parameters of the useful signal also change. These changes in parameters are then used as signs indicating that an energetic destructive effect is being exerted on the channel. The features of the occurrence of edge effects, which are manifested in the time and frequency domains, are investigated. The admissible amplitude ratios of the structural noise and the useful signal are substantiated, at which the effect is manifested, in which the wrong decision is made about the nomenclature of the processed signal. A method for restoring damaged FM signals in the form of a sequence of stages has been substantiated. At the first stage, there is a detection of time intervals with beats of the signal amplitude, which arise during the setting of structural interferences. After that, to restore the distorted signal, rectangular pulses are synthesized so that their duration is strictly equal to the interval within which beats are observed. And then the procedures for recovering the distorted signal are implemented. For this purpose, the logical addition of that part of the pulses of the information sequence of the signal, within which the effect of structural interference is detected, with the compensating pulses generated during the second stage, is performed. To clarify the implementation of these procedures, a block diagram of the device is given and the principle of its operation is explained. In addition, the article presents the main results characterizing the effectiveness of the proposed technique. The results of evaluating the effectiveness of the developed technique are presented.