发表机构
New York University; Sharp Laboratories of America（纽约大学; 夏普美国实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
基于6.75-142 GHz多频段测量数据，提出CI/CIF模型以扩展3GPP UMi路径损耗模型至0.5-150 GHz，参数稳定且与3GPP一致。
AI 中文摘要
将标准化的城市微蜂窝（UMi）路径损耗（PL）模型从中频段（FR3）扩展到亚太赫兹（sub-THz）频率，需要在统一框架内进行覆盖宽频谱范围的基于测量的比较。本文基于NYU WIRELESS在6.75、16.95、28、73和142 GHz频段、视距（LOS）和非视距（NLOS）条件下的广泛测量，推导了UMi环境下的单频和多频全向PL模型。各频段的单频近距离（CI）和浮动截距（FI）模型表明，CI模型产生更稳定且物理上可解释的参数，在所有五个频率上，其阴影衰落标准差与FI模型相差在0.98 dB以内。随后，我们使用CI、频率加权近距离（CIF）和alpha-beta-gamma（ABG）模型，将多频PL分析扩展到7-24 GHz、0.5-100 GHz和0.5-150 GHz频率范围。在逐渐变宽的频率跨度上，CI和CIF模型保持了稳定的距离指数，与第三代合作伙伴计划（3GPP）UMi解释紧密对齐，而ABG模型仅以更大的参数敏感性为代价，提供了非常有限的拟合误差降低。这些结果支持以1米处近距离自由空间路径损耗锚点为基础的物理锚定CI/CIF公式，以便将面向3GPP的UMi PL模型扩展到整个0.5至150 GHz频率范围。
英文摘要
Extending standardized urban microcell (UMi) path loss (PL) models from the upper mid-band (FR3) to sub-terahertz (sub-THz) frequencies requires measurement-based comparisons spanning a wide spectral range within a unified framework. In this paper, we derive single- and multi-frequency omnidirectional PL models for UMi environments based on extensive NYU WIRELESS measurements at 6.75, 16.95, 28, 73, and 142 GHz in line-of-sight (LOS) and non-line-of-sight (NLOS) conditions. Single-frequency close-in (CI) and floating-intercept (FI) models for each band show that CI yields more stable and physically interpretable parameters, with shadow fading standard deviations within 0.98 dB of FI across all five frequencies. We then extend the multi-frequency PL analysis to the 7-24 GHz, 0.5-100 GHz, and 0.5-150 GHz frequency ranges using CI, close-in with frequency weighting (CIF), and alpha-beta-gamma (ABG) models. Across progressively wider frequency spans, CI and CIF maintain stable distance exponents that remain closely aligned with the 3rd Generation Partnership Project (3GPP) UMi interpretations, whereas ABG offers only very modest reductions in fitting error at the cost of much greater parameter sensitivity. These results support physically anchored CI/CIF formulations with a close-in free space path loss anchor point at 1 m in order to extend 3GPP-oriented UMi PL models over the entire 0.5 to 150 GHz frequency range.
