Researching and simulation of digital antenna arrays with directive elements on azimuth – elevation while the VHF-signals propagation with diffraction losses
DOI:
https://doi.org/10.52575/2687-0932-2022-49-1-103-120Keywords:
Direction-of-arrival, digital beamforming, smart antenna, MUSIC, directional antennas, bit error rate, diffractionAbstract
The paper is devoted to the problem of using digital antenna arrays equipped with directional elements for spatial filtering in the azimuthal and elevation planes. In particular, the digital beamforming is investigated for VHF communication channels in the range below 1 GHz, taking into account the occurrence of obstacles in the path of direct propagation of radio waves. The digital beamforming on azimuth and elevation can be used to solve the problems. The paper presents the results of modeling the signal propagation in the VHF range on the link of Yelets – Lipetsk. It is assumed that a symmetrical dipole is used on the transmitting side, and the Yagi-Uda directional antenna is used on the receiving digital antenna array. The circular and semi-dodecahedral geometries of the arrangement of the elements of the receiving digital antenna array are modeled. The bit error rate is estimated depending the transmitter power. The Epstein-Peterson method is described in conjunction with the International Telecommunication Union (ITU) single knife-edge obstacle model for calculating multiple diffraction loss. The study was conducted for thirteen isolated knife-edge obstacles located along a propagation path of 70 km.
Acknowledgements
The reported study was partially supported by RFBR and Lipetsk Region, research project No 20-47-480002.
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