Analysis of Color Noise Effect on Quality of Recovering the Chaotic Signals With OFDM-Modulation

Recently, during the development of the modern information transmission systems, more and more attention has been paid to the search for new ways of forming and processing signals, which can simultaneously ensure the necessary level of stealth and speed of information transmission. Chaotic signals with OFDM-modulation satisfy these requirements. However, the effectiveness of their functioning has investigated only during impact of the "white" noise. Nonetheless, in real radio communication channels there are other types of noise, which called color noise. Such noises occur due to interference in the environment of propagation of radio signals and in the signal generation tools. In the work, the effect on chaotic signals with OFDM-modulation of colored noises has analyzed. It has shown that the presence of an additive mixture of desired signal, "white" and colored noises significantly reduces the quality of recovery of transmitted information. At the same time, to ensure a high level of information recovery, during the increase the number of subcarriers in the signal with OFDM-modulation, in receiver side should be the higher level of SNR.