机场表面点对点VHF传播路径损耗

D. Matolak, R. Apaza
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引用次数: 5

摘要

正如最近所指出的,甚高频(VHF)波段的无线信道尚未对机场表面区域进行彻底的定量表征。对于未来的业务,如甚高频数据通信,需要信道特性来实现系统优化。由于VHF通信的带宽较窄(25khz),信道色散不显著,但传播路径损耗至关重要。本文是我们之前在机场表面上甚高频传播路径损耗建模方面工作的补充。我们于2011年6月在克利维尔和霍普金斯国际机场(CLE)的航空VHF波段进行了路径损耗测量。非移动发射机使用连续波(正弦)信号,移动接收器沿着规定的路径在机场表面区域移动。发射器和接收器都位于货车中,通过基本链路预算分析实现“点对点”传播路径损失估计。我们获得了视距(LOS)和非视距(NLOS)条件下的路径损耗数据,并由此导出了对数距离路径损耗模型。克利夫兰地区NLOS地区的传播路径损失指数约为4,LOS地区的传播路径损失指数约为2.9。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Peer-to-peer VHF propagation path loss in the airport surface area
As recently noted, the wireless channel in the very high frequency (VHF) band has not been thoroughly quantitatively characterized for airport surface areas. For future services such as VHF Data Communications, channel characteristics are needed to enable system optimization. Given the narrow bandwidth of VHF communications (25 kHz), channel dispersion is not significant, but propagation path loss is vitally important. This paper serves as a companion paper to our prior work in the area of VHF propagation path loss modeling on the airport surface area (ASA). We made path loss measurements in the aeronautical VHF band at Clevel and Hopkins International Airport (CLE) in June 2011. The non-mobile transmitter used a continuous wave (sinusoidal) signal and a mobile receiver moved about the airport surface area in a prescribed path. Both transmitter and receiver were located in vans, enabling “peer-to-peer” propagation path loss estimation via basic link budget analysis. We obtained path loss data for both line-of-sight (LOS) and non-line-of-sight (NLOS) conditions, from which we derived the log-distance path loss models. The propagation path loss exponents were found to be approximately 4 for NLOS regions and 2.9 for LOS regions in Cleveland.
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