• Andrii Grekhov National Aviation University
  • Vasil Kondratiuk National Aviation University




OFDM channel, RPAS, transponder nonlinearity, UAV, vehicle communication channel


Purpose: to develop a model of the satellite communication channel for an remotely piloted air system with adaptive modulation and orthogonal frequency division of channels; 2) to calculate the channel parameters with Rayleigh fading and various types of satellite transponder nonlinearity; 3) analyze the effect of fading and the type of nonlinearity on the parameters of the satellite communication channel. Method: MATLAB Simulink software was used to simulate the channel operation. Results: For the first time, based on the IEEE 802.16d standard, a realistic model of the satellite communication channel of an unmanned aerial vehicle was developed, which is used to estimate the channel parameters. The created model takes into account the Rayleigh fading in the downlink and the nonlinearity of the satellite transponder amplifier. Dependences of the signal-to-noise ratio in the terrestrial receiver on the signal-to-noise ratio in the downlink for various types of modulation (BPSK, QPSK, 16QAM, 64QAM) and data transmission rates are obtained. The nonlinearity of satellite amplifiers was analyzed on the basis of a linear model, a cubic polynomial model, a hyperbolic tangential model, the Gorbani model, and the Rapp model. The results for the cubic polynomial model and the hyperbolic tangential model are similar to the linear model, but differ significantly from the Gorbani model and the Rapp model. For the Gorbani and Rapp models, very low values of the signal-to-noise ratio in the receiver are observed. Conclusion: The proposed approach can be considered as a method of estimating the parameters of the satellite communication channel of an unmanned aerial vehicle with fading. It is shown how the type of modulation varies depending on the level of the signal-to-noise ratio and the type of fading. The developed model allows to predict the operation of the channel with Rayleigh fading and can be useful for the design of communication systems.

Author Biographies

Andrii Grekhov, National Aviation University

Doctor of Physics and Mathematics (1990). Professor (1991). Expert of  EUROCONTROL for ADS-B systems.

Department of Air Navigation Systems, National Aviation University, Kyiv, Ukraine.

Education: Physical Department of the Kyiv State Taras Shevchenko University, Ukraine (1973), M.Sc. Degree with Honors confirming qualification of Physicist Theorist.

Research area: satellite communications and information channels, computer modeling of information flows in airborne collision avoidance systems, ADS-B systems, surveillance processes and modern signal processing, expansion of terrestrial surveillance systems for ADS-B using satellite system IRIDIUM, noise resistant coding and forward error correction, aviation security assessment based on simulation.

Vasil Kondratiuk, National Aviation University

Director of Research and Training Centre "Aerospace Center" at the National Aviation University.

Education: Kyiv Polytechnic Institute, Ukraine (1985).

Research area: global navigation satellite systems, unmanned aerial vehicles, aviation, performance-based navigation (PBN), experimental techniques.


EUROCAE WG73 UAS. Concept of RPAS Required Communication Performance Methodology for the Command, Control and Communication Link. Available at: https://www.uavdach.org/News/WG73_CClink_RRCPDraftforWG73CommentV0%2010.pdf.

STANAG 4609/AEDP-8. NATO Digital Motion Imagery Format. Available at: http://www.gwg.nga.mil/misb/docs/nato_docs/STANAG_4609_Ed3.pdf.

STANAG 7023/AEDP-9. NATO Primary Image Format. Available at: https://booksmovie.org/similar-pdf-stanag-7023-nato.html.

STANAG 4607/AEDP-7. NATO Ground Moving Target Indicator Format. (GMTIF). Available at: http://standards.globalspec.com/std/1300603/nato-stanag-4607.

Faezah J., Sabira K. (2009) Adaptive Modulation for OFDM Systems. International Journal of Communication Networks and Information Security, vol.1, no. 2, pp. 1-8.

Sharma D., Srivastava P. (2013) OFDM Simulator Using MATLAB. International Journal of Emerging Technology and Advanced Engineering, vol. 3, no. 9, pp. 493-496.

O'Droma, M., Mgebrishvili N., Goacher A. (2004) Theoretical analysis of intermodulation distortion in OFDM signals in the presence of nonlinear RF high power amplifiers. IEEE 59th VTC, vol.3, pp. 1295-1299.

Jantunen P. (2004) Modeling of Nonlinear Power Amplifiers for Wireless Communications. The thesis for the degree of Master of Science. Finland 138 p. Available at: <http://www.researchgate.net/publication/224263342_Nonlinear_RF_power_amplifier_behavioural_analysis_of_wireless_OFDM_systems>.

Gregorio F.H. (2007) Analysis and Compensation of Nonlinear Power Amplifier Effects in Multi-Antenna OFDM Systems. Dissertation for the degree of Doctor of Science in Technology, 133 p. Available at:


El-Khatib Z., MacEachern, Mahmoud S.A. (2012) Distributed CMOS Bidirectional Amplifiers: Broadbanding and Linearization Techniques. Chapter 2. Modulation Schemes Effect on RF Power Amplifier Nonlinearity and RFPA Linearization Techniques. Analog Circuits and Signal Processing. Springer, 134 p.

Park D., Song H. (2007) A new PAPR reduction technique of OFDM system with nonlinear high power amplifier. IEEE Trans. CE, vol.53, no. 2, pp. 327 – 332.

Cioni S., Corazza G. E., Neri M., Vanelli‐Coralli A. (2006) On the use of OFDM radio interface for satellite digital multimedia broadcasting systems. International Journal of Satellite Communications and Networking, vol.24, no. 2, pp.153-167.

Varade S., Kulat K. (2012) BER Comparison of Rayleigh Fading, Rician Fading and AWGN Channel using Chaotic Communication based MIMO-OFDM System. International Journal of Soft Computing and Engineering, vol.1, no. 6, pp. 2231-2307.

Ghorbani A., Sheikhan M. (1991) [The Effect of Solid State Power Amplifiers (SSPAs) Nonlinearities on MPSK and M-QAM Signal Transmission]. Sixth Int. Conference on Digital Processing of Signals in Comm., pp. 193-197.

Rapp C. (1991) [Effects of HPA-Nonlinearity on a 4-DPSK/OFDM-Signal for a Digital Sound Broadcasting System]. Proceedings of the Second European Conference on Satellite Communications, Liege, Belgium, pp. 179-184.

How to Cite

Grekhov, A., & Kondratiuk, V. (2017). RPAS ADS-B AND TRAJECTORY CONTROL DATA TRANSMISSION VIA SATELLITE. Proceedings of National Aviation University, 72(3), 26–32. https://doi.org/10.18372/2306-1472.72.11978




Most read articles by the same author(s)

1 2 > >>