摘要
针对小基站网络立体分布特性,提出了一种TDD制式下小基站蜂窝网络三维随机几何模型并进行了性能分析。首先,本文根据3-D PPP模型下小基站的空间分布特性推导了TDD制式下小基站网络上下行覆盖概率的数学表达式。接下来,基于覆盖概率的表达式和网络频谱效率的定义,分别推导了上下行交叉干扰场景下,小基站网络上下行频谱效率的一般表达式。仿真结果在验证了本文模型的合理性的同时还说明,随着下行小区占比和功率控制因子的增大,网络的频谱效率都呈下降趋势。除此之外,室内环境也会对网络的覆盖性能产生影响。
In view of the stereoscopic distribution characteristics of small cell networks, a 3-D stochastic geometric model for small cell networks in time division duplex(TDD) scenario is proposed in this paper and the performance analysis is carried out. First, based on the spatial distribution characteristics of small base stations in 3-D PPP model, we derive the mathematical expressions of the uplink and downlink coverage probability for the small cell networks in time division duplex system. Then, based on the results of coverage probability and the definition of spectral efficiency, the general expressions of average spectral efficiency for the dynamic TDD small cell networks with mix-interference of uplink and downlink are deduced respectively. The simulation results not only validate the rationality of the proposed model in this paper, but also show that the spectrum efficiency of the network decreases with the increase of downlink cell proportion and power control factor. In addition, the indoor environment will also have an impact on the network coverage performance.
作者
潘子宇
杨洁
郭楠
Pan Ziyu;Yang Jie;Guo Nan(Department of Information and Communication Engineering,Nanjing Institute of Technology,Nanjing,Jiangsu 211167,China;Department of Mathematics and Physics,Nanjing Institute of Technology,Nanjing,Jiangsu 211167,China)
出处
《信号处理》
CSCD
北大核心
2019年第11期1817-1825,共9页
Journal of Signal Processing
基金
江苏省高等学校自然科学研究项目资助(18KJB510017)
南京工程学院校级科研基金项目(ZKJ201801,PTKJ201603)
国家自然科学基金项目(61701221)
江苏省自然科学基金项目(BK20160781)
