Measurement of angular and distance correlation properties of log-normal shadowing at 1900 MHz and its application to design of PCS systems
Measurement of angular and distance correlation properties of log-normal shadowing at 1900 MHz and its application to design of PCS systems
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DOI：
10.1109/25.994804
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发表时间：
2002-08
期刊：
影响因子：
--
通讯作者：
J. Weitzen;T. J. Lowe
中科院分区：
文献类型：
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作者：
J. Weitzen;T. J. Lowe
本文研究了在城市、轻城市和郊区地形上，阴影衰落与两个PCS基站之间夹角的函数关系。这项研究的结果与干扰、切换增益的分析以及现代蜂窝和PCS系统中的各种频率规划应用相关。使用比以前的实验大得多的数据集，我们观察到，平均而言，信号的阴影衰落分量不相关，即使在小角度。我们的结果与几篇论文中所表达的传统观点相矛盾，传统观点认为，在小角度下存在相对较高的相关性。我们的结果表明，对于来自多个基站的小角度信号之间的关系，一个数学上更简单的不相关模型可以用于分析工具。通过在大量数据集上形成自相关函数计算的距离相关测量表明，阴影过程的相关距离约为25-100m。
This paper investigates the correlation properties of shadow fading as a function of the angle between two PCS base stations over urban, light urban, and suburban terrain. Results from this study are relevant to the analysis of interference, handoff gain, and to various frequency planning applications in modern cellular and PCS systems. Using a significantly larger data set than previous experiments, we observed that on the average, the shadow fading components of the signals are not correlated, even at small angles. Our results contradict the conventional wisdom, as expressed in several papers, which says that there is relatively high correlation at small angles. Our results indicate that a mathematically simpler uncorrelated model for the relationship between signals from multiple base stations at small angles can be used in analysis tools. Distance correlation measurements computed by forming the autocorrelation function on a large number of data sets showed that the correlation distance of the shadowing process ranges from about 25 to 100 m.