Analysis of frequency resource for FHSS mode

Introduction: When the radio frequency spectrum is as busy as it is today, it is especially important to ensure effective functioningof radio systems under various signal and interfering conditions. One of the research fields is radio frequency resource management.Purpose: Developing a system of proposals for choosing a frequency resource for radio system operation in the mode of frequencyhoppingspread spectrum (FHSS). Results: On the basis of the developed analytical apparatus, we have specified the conditions forpreliminary testing of working frequencies in the direct response mode in FHSS radio channels. Practical conditions are substantiatedfor achieving the required performance indicators from the parameters of the preliminary frequency testing process. A statementis proved that determines how the improvement of timely message delivery in a radio link with a pseudo-random adjustment of theoperating frequency depends on the growth of the array of allocated frequencies and on the speed of the program adjustment. A featureof the newly developed theoretical approaches is the formalization of radio system performance indicators based on the ratio of the timewithout taking into account the preliminary testing processes to the time required to implement the test mode with a fixed amount of aninformation message. The chosen criterion for selecting a frequency group is the permissible level of errors in the received test sequencewhose evaluation determines the group of specified unsuitable frequencies. On the basis of the conducted simulation, we have revealedthe relationships between the number of unsuitable frequencies and the gains provided by the timeliness of information transfer,depending on the performance indicators found during the testing of the working frequencies. Practical relevance: The developedsolutions, in their entirety, provide a better timeliness of message delivery in radio systems in FHSS mode.