INVESTIGATION OF PROBABILISTIC CHARACTERISTICS OF RECEIVING OFDM-SIGNAL STRUCTURES FOR MULTIPATH PROPAGATION AND PRESENCE OF CONCENTRATED INTERFERENCE SPECTRUM

The results of noise immunity studies signal structures based on signals with orthogonal frequency multiplexing (OFDM signals) for multipath propagation and in the presence additive spectrum-focused interference (SFI) are presented. It has been shown that algorithms receiving these constructs SFI compensation, essence which is non-linear processing input implementations by limiting or switching off spectral components weight implementations. Noise analysis was carried out a number investigated variation their base using low-density code rate 1/2 Kaiser window. most efficient nonlinear mode - energy gain when applying reaches 1.5 dB relation to limitation. also respect channel white Gaussian losses 9 do not exceed 3.85 while theoretical estimate required reliable information transmission this exceeds 20 dB.