Test signals with multilevel subcarriers as applied to satellite radio-navigation systems

Noise-like meander signals are proposed to generate on the basis of multilevel pseudorandom sequences making it possible to include multilevel subcarriers. It is demonstrated that such signals are characterized by the pronounced central region of the principal peak of the real part of their complex autocorrelation function and its other values remain almost identical in the time interval corresponding to the principal correlation peak. They are several times less than those of binary offset carrier modulated signals. It is established that the selection of a subcarrier phase structure makes it possible to more flexibly control the shape of the power spectral density of signals and its arrangement on the frequency in comparison with BOC signals.