Analytical model OFDM-MIMO signal in a radio channel with frequency-time selective fading

Authors

DOI:

https://doi.org/10.20535/2411-1031.2023.11.1.283538

Keywords:

wireless electronic communication networks, inter-symbol interference, multi-antenna systems, orthogoal frequency multiplexing, fluctuation noise

Abstract

One of the main problems in modern wireless electronic communication networks is the transmission and reception of signals in multipath propagation. Due to the imperfect impulse response of the communication channel, frequency-selective fading of the transmitted signal occurs. This can cause waveform distortion and inter-symbol interference, which can seriously degrade the performance of the communication system. Thus, increasing the noise immunity of wireless electronic communication networks in real-world conditions is one of the most important tasks of modern communication technologies. Orthogonal frequency division multiplexing is known for its resistance to multipath fading and is used to reduce the impact of inter-symbol interference. Multi-antenna systems are a key technology for increasing bandwidth and improving communication reliability. The combination of these two technologies in wireless electronic communication networks can reduce the impact of negative phenomena on the transmitted signal in difficult interference conditions. An analytical model of the signal transmitted by a nonstationary frequency-selective radio channel in a wireless electronic communication network with orthogonal frequency multiplexing and a multi-antenna system is proposed. Analytical expressions are presented that allow us to jointly take into account the influence of interchannel and inter-symbol interference (the effect of multipath signal propagation and Doppler shift on the transmitted signal) against the background of fluctuating noise. Taking into account the factors affecting the transmitted signal makes it possible to bring the model closer to the real processes that occur in the vast majority of radio channels of wireless electronic communication networks.

Author Biographies

Dmytro Mogylevych, Institute of special communication and information security National technical university of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv

doctor of technical science, professor, chief of the Special department No. 3

Liudmyla Pogrebniak, Kruty Heroes military institute of telecommunications and information technologies, Kyiv

candidate of technical sciences, associate professor оf telecommunication system and network department

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Published

2023-06-29

How to Cite

Mogylevych, D., & Pogrebniak, L. (2023). Analytical model OFDM-MIMO signal in a radio channel with frequency-time selective fading. Collection "Information Technology and Security", 11(1), 39–46. https://doi.org/10.20535/2411-1031.2023.11.1.283538

Issue

Vol. 11 No. 1 (2023)

Section

MATHEMATICAL AND COMPUTER MODELING

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