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首页> 外文期刊>Antennas and Propagation, IEEE Transactions on >Improved Communications in Underground Mines Using Reconfigurable Antennas
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Improved Communications in Underground Mines Using Reconfigurable Antennas

机译：使用可重构天线改善地下矿井中的通信

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摘要

Fixed performing antennas are ineffective in providing optimum performance in a changing multipath environment, such as underground mines where channel conditions quickly change as the antenna is moved. Hence, we investigated the performance of a pattern reconfigurable antenna (RA) in improving the wireless communications link in a hard rock underground mine. An RA and a dipole were characterized and compared in line-of-sight (LOS) and nonline-of-sight (NLOS) propagation scenarios. As a proof of concept, experiments were performed at the University of Queensland Experimental Mine using a 1 GHz frequency band centered at 2.45 GHz. Analysis of complex channel impulses captured through the frequency-domain channel sounding is presented. Also, the results show that reconfigurability in the rich multipath environment achieves a 20% and 34% improvement in path loss and delay spread, respectively, compared to a fixed-beam antenna in NLOS propagation. Furthermore, more than 34% improvement in coherence bandwidth is observed in LOS and NLOS. Therefore, reliable high-data-rate communication is achievable in underground mines by the effective management of multipath effects using the RA.
机译：固定性能的天线无法有效地在不断变化的多径环境中提供最佳性能，例如地下矿井，随着天线的移动，信道条件会迅速变化。因此，我们研究了模式可重构天线（RA）在改善硬岩地下矿井中的无线通信链路方面的性能。在视距（LOS）和非视距（NLOS）传播场景中对RA和偶极子进行了表征和比较。作为概念证明，在昆士兰大学实验矿大学进行了实验，使用了以2.45 GHz为中心的1 GHz频带。提出了通过频域信道探测捕获的复杂信道脉冲的分析。而且，结果表明，与NLOS传播中的固定波束天线相比，在丰富的多径环境中，可重构性分别实现了20％的路径损耗和34％的延迟扩展。此外，在LOS和NLOS中，相干带宽提高了34％以上。因此，通过使用RA进行多径效应的有效管理，可以在地下矿井中实现可靠的高数据速率通信。

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