面向农村远距离通信的含衍射分量的基于测量的近距离路径损耗建模
Measurement-based Close-in Path Loss Modeling with Diffraction for Rural Long-distance Communications
AI总结：
本研究基于韩国农村地区的实测数据，构建融合衍射分量的新型近距离路径损耗模型，验证其可显著降低标准差且与频率无关，适用于毫米波以下频段的农村远距离通信场景。
摘要：
本文基于春季在韩国中部农村地区开展的测量，研究了农村大规模路径损耗模型。具体而言，我们构建了融合衍射分量的新型近距离（CI）路径损耗模型。测量系统的发射机位于山丘上，采用工作在1400 MHz和2250 MHz频段的全向天线；接收机同样配备全向天线，在1400 MHz频段下共测量3858个位置（其中视距LOS位置1262个，非视距NLOS位置2596个），在2250 MHz频段下共测量4957个位置（其中视距LOS位置1427个，非视距NLOS位置3530个）。研究表明，新构建的融合衍射分量的CI路径损耗模型可显著降低标准差（STD），且与频率无关，尤其适用于传播距离超过首米的视距场景，适合在高达毫米波的频段下使用。
英文摘要：
In this letter, we investigate rural large-scale path loss models based on the measurements in a central area of South Korea (rural area) in spring. In particular, we develop new close-in (CI) path loss models incorporating a diffraction component. The transmitter used in the measurement system is located on a hill and utilizes omnidirectional antennas operating at 1400 and 2250 MHz frequencies. The receiver is also equipped with omnidirectional antennas and measures at positions totaling 3,858 (1,262 positions for LOS and 2,596 positions for NLOS) and 4,957 (1,427 positions for LOS and 3,530 positions for NLOS) for 1400 and 2250 MHz, respectively. This research demonstrates that the newly developed CI path loss models incorporating a diffraction component significantly reduce standard deviations (STD) and are independent of frequency, especially for LOS beyond the first meter of propagation, making them suitable for use with frequencies up to a millimeter-wave.
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