Gorokhov Y. Increasing jamming protection digital communication systems based on spread spectrum signal timer structures

Object of research - is the transformation and coding signals, providing noise immunity of radio and telecommunications systems. The subject of research is ensembles of noise-like signals based on methods of extension spectrum timer signal designs. Research methods is the methods of statistical communication theory and information theory, combinatorics theory, the theory of correlation and spectral analysis, information security theory, the theory signals, error-correcting coding theory, theory statistical and imitational modeling. Theoretical and practical results: supposed method of synthesizing noise-like signals for noise immunity radio and telecommunications systems based on nonpositional timer signal designs to enhance indicators of noise immunity and secrecy transmission; it developed a number of programs for hardware and software synthesis of noise-like signals based on compound timer signal constructions and random sequences; developed and researched methods of processing the timer noise-like signals based on the correlation reception, allowing to allocate the front of significant moments within the play nonpositional signal design. Scientific novelty: the theory has been further developed the timer coding for its application in noise immunity of communication systems with broadband noise-like signals, which allowed to integrate processes of providing noise immunity, energy and structural secrecy in the single task; the first proposed methods for the synthesis and processing of noise-like signals with nonpositional timer signal constructions, which differ from the known methods of expanding the range of positional signals and their admission, which allowed to increase the secrecy and immunity of functioning radio and telecommunications systems; the first proposed a method of forming the group signal and the separation the signals of individual channels based on based compound uses of nonpositional timer signal constructions and random sequences, in contradistinction to positional signals systems with the code division multiple which increases structural secrecy; proposed a new method of constructing noise immunity of communication system based on random adjustment of operating frequency adjustment, which uses timed signals from the preliminary direct spreading using random sequences, which increases energy and structural secrecy.