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The results of analysis for signals propagating through the ionospheric satellite communication channels are presented in the article. As a measure of distortion estimates concerning to the free space propagating the signal/noise degradation and the detection errorperformances are used. The descriptions of signal distortions due to ionospheric influence are based on the time-domain solution for ionospheric channel as linear stationary filter. The signal/ noise and error-performance degradations for two-phased shift keying signals are evaluated. The computer simulations for evaluation of these error-performance degradations concerning signal/ noise decreasing are performed the degradation of signal/noise is about 2.5 dB for bit-error 0.00001.

THE INVESTIGATION OF IONOSPHERIC CHANNEL INFLUANCES FOR PHASED SHIFT KEYING DIGITAL SIGNALS