V.D. Lukyanchikov, N.N.Semenov

In present time for practical application in various fields are proposed to use signals where as carrier are radio impulses with linear frequency modulation and as a phase code - binary pseudorandom sequences. The primary disadvantage of such type of signals is that in case of small steepness of the modulation, level of lateral emissions of autocorrelation function becomes very large. It restrains growth of volume of ensemble of such signals at use in communication systems with multiply access. For use in systems of a location or navigation, signals with such parameters of autocorrelation function also are minimally suitable. In present article there is developed the model of the complex signal which combines the best properties of signals with linear frequency modulation and signals with expansion of a spectrum by the direct sequence method. Analysis of its spectral and correlation characteristics has shown, that it is lacks of disadvantages of described above complex signal and can be successfully used in radio engineering and hydro-acoustic systems of different function.