Browsing by Author "Kharchenko, Volodymir"

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    ADS-B Satellite Communication Channel Based on IEEE 802.16 Standard
    (De Gruyter Open, 2017-12) Kharchenko, Volodymir; Grekhov, Andrii; Kondratiuk, Vasyl; Nagorna, Karina
    Original models of “Aircraft-Satellite-Ground Station” communication channel based on IEEE 802.16 standard were built by using MATLAB Simulink. The influence of aircraft transmitter nonlinearity for different types of fading in the channel (Rayleigh and Rician) was studied and the possibility of correcting nonlinearity by using pre-distortion was revealed. The impact of space-time diversity (MISO 2 × 1) for different types of fading in channels was investigated. The effect of the Doppler frequency shift on the operation of communication channels was analyzed.
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    MODELING OF “SATELLITE-TO-AIRCRAFT” LINKFOR SELF-SEPARATION
    (Transport, 2013) Kharchenko, Volodymir; Barabanov, Yurii; Grekhov, Andrii
    For modelling of data transmissionfrom low-orbit satellite constellation Іrіdіum the original model of a communication channel "Satellite-to-Aircraft" was built using MATLABSіmulіnk.The model comprises “Satellite Downlink Transmitter” (Bernoulli Random Binary Generator, Convolutional Encoder, BPSK Baseband Modulator, High Power Amplifier with a memoryless nonlinearity, Satellite Phase Noise, Transmitter Dish Antenna Gain), “Downlink Path” (Free Space Path Loss, Phase/Frequency Offset), “Aircraft Downlink Receiver” (Receiver Dish Antenna Gain, Aircraft Receiver System Temperature, Viterbi Decoder), “Error Rate Calculation” block and “Display”.Modeling was realized without and with convolutional coding (r=3/4, K=7) at different noise temperatures and free space losses. Dependencies of a Bit Error Rate on free space path losses, antennas diameter, phase/frequency offsets, satellite high power amplifier backoff level, and phase noise were received and analyzed.