基于混合方法的室内电波传播特性研究

发布时间：2018-04-05 00:20

本文选题：室内电波传播　切入点：PE方程　出处：《南京邮电大学》2015年硕士论文

【摘要】：随着4G时代的到来,无线通信的应用正逐渐由室外向室内发展,而大量数据流量业务和通话发生在室内,因此需要对复杂的室内电波传播进行研究,建立实用性强、适用范围广的室内电波传播模型,可以为室内无线通信系统的设计提供最优化的方案。从而免去了实地设站检测的巨额费用,对室内电波传播的研究具有重要意义。本文在研究室内电波的电场分布和损耗时,选用的是PE法;并针对PE法的缺点进行改进,引入积分方程法对其进行校正,叠加后得到的混合法可用于室内电波的场强,损耗,接收功率和时延特性等方面的研究。本文主要研究内容如下:(1)研究PE法在室内的精度与计算范围,仿真表明Padé近似的PE法比泰勒近似的情况提高了最大计算仰角,扩大了PE法的有效计算范围。(2)研究室内电波传播的损耗与频率的关系,仿真表明PE法对高频率(Ghz以上)的电磁场描述比较准确。同时研究天线放置的位置对室内电波传播的影响。(3)研究改变室内环境(增加铁门和玻璃窗)对PE法的影响,针对PE法的不足引入基于并矢格林函数的积分方程法对其进行校正,从而得到混合法。(4)研究混合法与PE法在室内信道的仿真,通过仿真比较室内电波传播的性能,得出混合法比PE法对室内电波传播的描述更精确(路径损耗降低了5dB)。在增加室内环境复杂程度后,混合法比PE法更适合用于研究室内电波传播。
[Abstract]:With the arrival of 4G era, the application of wireless communication is gradually developing from outdoor to indoor, and a large number of data traffic services and calls take place indoors. Therefore, it is necessary to study the complex indoor radio wave propagation and to establish a strong practicability.A wide range of indoor radio propagation models can provide an optimal scheme for the design of indoor wireless communication systems.Therefore, the huge cost of field station detection is avoided, which is of great significance to the study of indoor radio wave propagation.In this paper, the PE method is used to study the electric field distribution and loss of indoor electric waves, and the integral equation method is introduced to correct the shortcomings of PE method. The superimposed mixing method can be used for the field strength and loss of indoor radio waves.The characteristics of receiving power and time delay are studied.The main contents of this paper are as follows: (1) the accuracy and calculation range of the PE method are studied. The simulation results show that the Pad 茅 approximation increases the maximum calculated elevation angle compared with the Taylor approximation.The effective calculation range of PE method is expanded to study the relationship between the loss of indoor radio wave propagation and the frequency. The simulation results show that the PE method is more accurate in describing electromagnetic field above high frequency Ghz).At the same time, the influence of the position of the antenna on the propagation of indoor radio waves is studied. (3) the influence of changing the indoor environment (adding iron doors and glass windows) on the PE method is studied. The integral equation method based on dyadic Green's function is introduced to correct the PE method.The simulation results show that the hybrid method is more accurate than the PE method in describing the indoor radio propagation, and the path loss is reduced by 5 dB.When the complexity of indoor environment is increased, the hybrid method is more suitable than PE method for the study of indoor electric wave propagation.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN011

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