Abstract
<span>Due to an increase in the number of radio devices with different types of signals and to increase the speed of information transmission, it is necessary to take into account the increase in the probability of erroneous reception of signals as a result of specific disturbances. The investigated methods (techniques) for increasing the noise immunity of radio communication with the FHSS do not take into account the influence of transmitters and fail to predict the load of the radio frequency spectrum. The purpose of this work is the development of the algorithm for the practical implementation of the method of increasing the noise immunity of the radio communication equipment with pseudo randomization of the operating frequency to increase the noise immunity of the radio communication equipment. The essence of the proposed algorithm is the rational distribution of working frequencies between the radio communication devices with pseudo randomization of the operating frequency taking into account the mutual influence of transceivers on each other. According to the results of the research, the application of the methodology based on the proposed algorithm allows to increase the noise immunity of radio communication with pseudorandom interrupt of the operating frequency by an average of up to 30%, depending on the channel state, while an increase in the computational complexity at the level of 10% is noted due to the increase in the number of computational procedures in the method. Thus radio communication systems with the FHSS while working on the basis of the proposed methodology shows an advantage over the known methods.</span>
Highlights
The problem of providing reliable communication in the conditions of the influence of directed and unintentional interference, as well as provision of multi-station access at work in packet radio networks can best be solved with the use of broadband signals in radio communication devices (RCD) [1]
In order to verify the adequacy and reliability of the developed method of increasing the noise immunity of RCD with frequency-hopping spread spectrum (FHSS), the developed method was performed by comparison with the results presented by the Iterative Solutions group [9]
The research of the developed algorithm of adaptive RCD functioning according to the developed method showed that the adaptive scheme of the radio communication devices provides on average 16-27% higher energy efficiency than nonadaptive
Summary
The problem of providing reliable communication in the conditions of the influence of directed and unintentional interference, as well as provision of multi-station access at work in packet radio networks can best be solved with the use of broadband signals in radio communication devices (RCD) [1]. For the FHSS method, the principle of combating noise is to place an information signal with a small dimension in a high-dimensional signal space In such conditions, the noise generator should either distribute the limited power of interference over the entire frequency range, thereby creating a small spectral density of interference power, or use the entire power of the interference transmitter in a limited frequency range, leaving a part of the RCD frequency band free of interference. The purpose of the research is to develop a method of FHSS radio communication in the context of deliberate interference. To achieve this goal, the following tasks were solved:
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