A. V. Bashkirov - Ph. D. (Eng.) of design and manufacture of radio, Voronezh State Technical University
A. I. Klimov - Dr. Sci. (Eng.), professor of the chair of info communication systems and technologies of Voronezh Institute of the Interior of Russia
L. N. Korotkov - Dr. Sci. (Phys.-Math.), professor of chair of physics of solid state, Voronezh State Technical University
Y. S. Naumenko - Post-graduate student department of design and manufacture of radio, Voronezh State Technical University

The article considers the influence of the characteristics of noise generators on the simulation results of error-correcting codec. The structure of models of noise exposure in the channel, which is used to simulate the pseudo-random number generators (PRNG). Considerable attention is paid to the influence of the period used pseudorandom number generators. Algorithms for constructing certain PRNG. Some models of the formation of normally distributed noise amplitudes using pseudorandom number generators with a uniform distribution of output values. The adequacy of these models is estimated upon the simulation results encoding / decoding of low-density parity-check binary symmetric channel with additive white Gaussian noise with bit flipping algorithm and belief propagation algorithm. Provides recommendations to improve the quality of evaluations Immunity characteristics codecs obtained in the simulation.