Area spectral efficiency of cellular mobile radio systems
Area spectral efficiency of cellular mobile radio systems
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DOI：
10.1109/vetec.1997.600409
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发表时间：
1997-05
期刊：
影响因子：
--
通讯作者：
Mohamed-Slim Alouini;A. Goldsmith
中科院分区：
文献类型：
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作者：
Mohamed-Slim Alouini;A. Goldsmith
我们考虑可变速率传输蜂窝移动的系统的平均区域频谱效率（ASE）。该效率被定义为小区基站支持的最大平均数据速率/Hz/单位面积的总和。我们研究了这种效率作为一个功能的复用距离的FDMA和TDMA系统的上行链路在不同的干扰配置。结果表明，基于最坏情况的干扰配置，最佳的重用距离约为4。然而，对于最佳情况和平均干扰配置，该最佳重用距离是2（即，频率应当在每个小区被重用）。此外，ASE作为相对于单元尺寸的四阶多项式的指数减小。这个结果精确地量化了随着小区大小的减小，蜂窝系统容量增加了多少。我们还量化了由于天线扇区化的ASE的增加。我们的结论是通过分析的ASE流量负载时，采用固定的信道分配的效果。
We consider the average area spectral efficiency (ASE) of variable-rate transmission cellular mobile systems. This efficiency is defined as the sum of the maximum average data rates/Hz/unit area supported by a cell's base station. We study this efficiency as a function of the reuse distance for the uplink of FDMA and TDMA systems under different interference configurations. Results indicate that, based on the worst-case interference configuration, the optimal reuse distance is approximately four. However, this optimal reuse distance is two for the best-case and the average interference configurations (i.e. frequencies should be reused every cell). In addition, the ASE decreases as an exponential of a 4th order polynomial relative to the cell size. This result quantities exactly how much cellular system capacity increases with decreased cell size. We also quantify the increase in ASE due to antenna sectorization. We conclude by analyzing the effect of traffic loading on the ASE when a fixed channel assignment is employed.