THE INCREASE OF TRANSMISSION PROTECTION BASED ON MULTIPLEXING OF TIMER SIGNAL CONSTRUCTIONS

Abstract

In the article the method for increasing the security of confidential information transmission based on multiplexing of timer signal structures is addressed. The feasibility of this study is justified by the need to ensure the security of information transfer in the conditions of electronic conflict. The use of OFDM technology for this task increases the noise immunity of communication systems in complex signal propagation conditions. The examples are the IEEE 802.11a and HiperLAN / 2 radio channels, as well as communication systems in which a wired channel is implemented based on ADSL. No less important task is to protect the transmitted information from unauthorized access. The majority of methods of protecting information from unauthorized access are concentrated on the upper layers of the OSI model, which is in accordance with the recommendations of X.800. Progress in improving methods and means of electronic reconnaissance and unauthorized access increases the risk of compromising certain information security mechanisms. Therefore, comprehensive approach to protecting information from unauthorized access is justified, in which not only the upper but the lower layers of the OSI model should be involved. It is proposed to use information signals of complex information that are formed by multiplexing the pulses of timer signal constructions in order to increase the transmission security at the lower levels of the OSI model. The advantage of timer signal constructions is the possibility of increasing the information transfer rate in binary channels. Also, based on timer coding, noise immunity coding and various algorithms for enhancing the structural secrecy of signal construction are implemented. The correcting ability and structural construction of the timer signals depends on the parameters of their constructions. The multiplexing method based on OFDM is designed for position signals, therefore it cannot be applied to non-position timer signal constructions. A new method for multiplexing and demultiplexing timer signal constructions is proposed. Obviously, increasing the security of OFDM technology is no less important, so the relevance of this research is beyond doubt. The aim of the work is to increase the security of the transmission channel on the basis of multiplexing of non-position timer signals.