高度相关的频谱活动测量与建模：以FM无线电台频段为例
Height-Dependent Spectrum Activity Measurements and Modeling: A Case Study with FM Radio Bands
AI总结：
本文提出一种基于直升机搭载SDR的高度依赖传播模型，用于FM无线电台频段的频谱活动测量与建模，通过实验验证该模型在复杂城市地形中优于传统FSPL模型。
摘要：
随着无线连接需求的增加，需要先进的频谱建模来实现下一代空中通信的高效频谱共享。虽然传统模型往往忽略信号行为的垂直变化，本文提出了一种基于直升机搭载软件定义无线电（SDR）的高度依赖传播模型。我们收集了88 MHz至6 GHz范围内的广泛测量数据，涵盖城市和乡村环境。作为验证我们方法的案例研究，我们专注于FM无线电台频段，这使我们能够利用公开的发射机位置和发射功率水平，以促进分析结果与测量结果之间的比较。我们发现，在特定高度阈值处，信号行为从非视距（NLoS）明显过渡到视距（LoS）区域，并提出了一种包含这种过渡的高度依赖路径损耗模型。我们的结果表明，所提出的模型在复杂的城市地形中显著优于标准自由空间路径损耗（FSPL）模型，为跨新兴空中无线技术和频段的海拔感知频谱预测和管理提供了更准确的框架。
英文摘要：
The increasing demand for wireless connectivity necessitates advanced spectrum modeling to enable efficient spectrum sharing for next-generation aerial communications. While traditional models often overlook vertical variations in signal behavior, this paper proposes a height-dependent propagation model using a helikite-mounted software-defined radio (SDR). We collected extensive measurement data across the 88 MHz to 6 GHz range in both urban and rural environments. As a case study to validate our methodology, we focus on the FM radio band, which allows us to use publicly available transmitter locations and transmit power levels to facilitate comparisons between analytical with measurement results. We identify a clear transition from non-line-of-sight (NLoS) to line-of-sight (LoS) regimes at a specific altitude threshold and propose an altitude-dependent path loss model that incorporates this transition. Our results demonstrate that the proposed model significantly outperforms the standard free space path loss (FSPL) model in complex urban topologies, providing a more accurate framework for altitude-aware spectrum prediction and management across emerging aerial wireless technologies and bands.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
