Timer Signals Transmission Security Increase Based on Spectrum Spreading Methods

The perspective direction for increasing the signal constructions secrecy in radio communication systems. One of the solutions to the problem of information security increase at the first level of the OSI reference model [1] is the use of various spectrum-spreading methods of the information signal, such as: frequency hopping spread spectrum (FHSS) [2], direct Sequence Spread Spectrum (DSSS) [3]. This allows to solve problems of ensuring the energy secrecy of signal constructions. Another important indicator for ensuring the information protection from unauthorized access is the strong signal constructions structural secrecy. This indicator should resist measures that are aimed at detection the form of signal structures, if the enemy has solved the problem of detecting the fact of messages transmission and interception. For increasing the structural secrecy, it is proposed to use timer signal constructions (TSC). TSC are non-positional signals. Based on TSC on the given time interval, it is possible to create larger number of signal constructions than for positional signals. In works [4], [5] was given an assessment of the structural secrecy of TSC, which made it possible to conclude that it is expedient to use them in noise-protected communication systems. So, in this paper perspective approach for the formation of broadband signal-code constructions based on various signal spectrum-spreading methods is proposed. Proposed method for forming TSC based on combined technology of FHSS and DSSS application. Its effectiveness plane to evaluate in the course of further research