Analysis of functioning efficiency of information transmission systems with chaotic signals with OFDM-modulation within the conditions of intentional interference




intentional interference, OFDM-modulation, analytical chaotic sequence, probability of correct detection, information transmission system


Recently, during the development of new information transmission systems, more and more attention has paid to the development of complex types of signals that can provide a high level of stealth during information transmission. One of the ways to generate such signals is to use chaotic sequences and processes, the properties of which are close to the properties of “white” noise. However, when using chaotic signals in real communication channels, there is a question about the effectiveness of their recovery on the receiving side, especially during the influence of intentional interference. Therefore, the aim of research is the analysis of functioning efficiency of information transmission systems with chaotic signals with OFDM-modulation within the conditions of intentional interference. In order to achieve the defined goal, the following tasks have been set: to investigate the minimal required distance between the frequencies in analytical chaotic sequence, whereby maintain the necessary quality of recovering the message and the influence on such information transmission system amplitude-modulated noise interference and frequency-modulated noise interference. It has been solved by using methods of nonlinear dynamics and methods of the statistical theory of observation processing. The following results are obtained: the minimal necessary distance between frequencies in analytical chaotic sequences, which is manipulated by the elements of the information sequence, has been detected. It can maintain the best level of recovery the message during the low lever of signal-to-noise ratio on receiver entry. The influence of spectral power density of amplitude-modulated noise interference on chaotic signals with OFDM-modulation has been analyzed. It has shown that when it increase the higher level of signal-to-noise ratio is required on receiver. The analysis of the spectral width of frequency-modulated noise interference showed that it’s increase lead to descent the probability of correct detection. It has been shown that the increase of the number of subcarriers in chaotic signals with OFDM-modulation lead to quality loss of signal detection. The scientific novelty of the obtained results lies in the following: for the first time, investigated the minimal required distance between the frequencies in analytical chaotic sequence, during what the correlation receiver can recover the transmitted message with high quality. It has been showed that the required level of recovering the information sequence from chaotic signals with OFDM-modulation can be obtained only during the influence on it the “white” noise and amplitude-modulated noise interference.

Author Biographies

Konstiantyn Vasiuta, Ivan Kozhedub Kharkiv National Air Force University, Kharkiv

doctor of technical science, professor, honored worker of science of Ukraine, deputy chief in academic work

Uliana Zbezhkhovska, Ivan Kozhedub Kharkiv National Air Force University, Kharkiv

postgraduate student

Valerii Slobodyanuk, Ivan Kozhedub Kharkiv National Air Force University, Kharkiv

candidate of technical science, senior instructor in department of aviation radiotechnical navigation and landing systems


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How to Cite

Vasiuta, K., Zbezhkhovska, U., & Slobodyanuk, V. (2022). Analysis of functioning efficiency of information transmission systems with chaotic signals with OFDM-modulation within the conditions of intentional interference. Collection "Information Technology and Security", 10(2), 216–229.