METHOD OF ADAPTATION OF SHORT-WAVE COMMUNICATION SYSTEM WITH OFDM-SIGNALS

摘要

FIELD: radio engineering, communication.;SUBSTANCE: in the number of optimized parameters in the implementation of the radiocommunication system adaptation process, the parameter, the diversion value in the frequency of adjacent subcarriers of the OFDM-signal, is additionally introduced, while changing the diversity value of Δƒ_subcarrier in the frequency, the duration of the OFDM-signal T_OFDM also varies according to law T_OFDM=1/Δƒ_subcarrier. In this case, the state of the communication channel is estimated from the values of frequency scattering, time scattering, and the signal-to-noise ratio measured in the process of receiving the route-sounding signals. The values of the optimized parameters of the communication system are determined using predefined compliance tables, in each of which for each pair of frequency and time scattering values possible in the communication channel they determine: the minimum value of the signal-to-noise ratio required to provide communication with a given quality, as well as the number signal-code structure from the number implemented by the communication system and the frequency diversity value of adjacent subcarriers of the OFDM-signal, at which the minimum value of the signal-to-noise ratio is achieved.;EFFECT: increasing the capacity of the adaptive communication system with OFDM-signals.;4 cl