Abstract
In order to reduce the path loss of the wireless communication signal in the underground tunnel, a scheme for configuring the antenna polarization of wireless systems based on a zone-division method is proposed. A multimodal method is used to estimate the effect of antenna polarization on the wireless propagation. When the optimal polarization of the antenna leading to low path loss is different in the zones near and far from the transmitting antenna, a dividing point is used to separate the zones. Experiments are conducted in an underground mine. It shows that the results by the multimodal method are consistent with the real data. Compared with the existing coverage schemes, the proposed scheme can obtain better coverage. Meanwhile, zone division has an important influence on the optimized performance of the wireless coverage. The zones divided based on Fresnel zone clearance and system identification are too small or too large, which result in incorrect polarization switching and high path loss.
Highlights
Mining is very important in modern life by supporting mankind with energy and various mineral resources
(2) Zone division and polarization switching are applied to dynamic coverage optimization of the wireless system for communication in underground mines and tunnels. e effectiveness and feasibility of the coverage optimization are validated by experiments in real mines
Huo et al [13] find that the results reported in [12] are valid when the receiver is located near the transmitter
Summary
Mining is very important in modern life by supporting mankind with energy and various mineral resources. In underground mines and tunnels, only the horizontally polarized antenna can achieve low path loss when the electromagnetic signal is propagated in the zone far from the transmitter [13,14,15]. In order to reduce the power loss of the signal for communication, it is necessary to distinguish the different propagation regions of the wireless system and configure different optimal antenna polarization as the user moves. Is paper expands the work in [13] It employs region division and polarization switching to realize dynamic coverage optimization of wireless systems at any position in the tunnel. (2) Zone division and polarization switching are applied to dynamic coverage optimization of the wireless system for communication in underground mines and tunnels.
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