【作者】 唐宇；

【导师】 周正； 孙学斌；

【作者基本信息】 北京邮电大学 ， 通信与信息系统， 2012， 硕士

【摘要】 超宽带无线通信是以极低的功率谱密度的方式与传统窄带无线通信系统共享频谱的,超宽带无线通信系统与蜂窝移动通信系统如何实现共存是当前研究的热点。本文选题来源于国家自然科学基金与国家科技重大专项等项目的子课题,具有重要理论意义和现实意义。本文在对超宽带无线通信技术的基本原理技术特点以及蜂窝移动通信系统的技术特点和性能指标进行了深入的分析研究的基础上,重点探讨了室内环境下,单个及多个超宽带设备对蜂窝移动通信系统下行链路的电磁干扰问题。针对现有的两种电磁干扰分析模型的缺点,本文提出了一种新的三维空间模型,并据此对室内环境下超宽带无线通信设备对GSM-900,GSM一1800,TD-SCDMA和WCDMA下行链路的合成干扰进行了研究。本文提出的三维空间模型考虑了超宽带设备活动性,以性能衰减参数MUWB来表征干扰接收器链路预算的衰减,从理论上得出了三维空间干扰的统计模型,并依据FCC和ETSI发布的超宽带辐射功率频率模板,使用蒙特卡洛方法进行大量的仿真分析,得到了最大可接受超宽带设备密度和最小距离。最后,本文根据仿真结果分析比较了蜂窝移动通信系统的抗干扰能力以及FCC和ETSI超宽带辐射功率频率模板的防护效率。更多还原

【Abstract】 The Ultra-wide Bandwidth (UWB) wireless communication system works at a very low power density, sharing the spectrum with traditional narrowband wireless communication system. Currently, it is a hot spot to research how to realize the co-existence of UWB and cellular mobile communication systems. This topic comes from national natural science foundation of China and national science and technology major projects, and has important theoretical and realistic significance.Based on the in-depth analysis of the UWB system technology characteristics and the basic principle of cellular mobile communication system technology characteristics and performance, this paper studies the interference from a single UWB devices and the cumulative interference from multiple UWB devices to cellular mobile communication systems.This paper develop a new three-dimensional model of UWB wireless system.We particularly focused on indoor environments and the downlink of GSM-900, GSM-1800, TD-SCDMA and WCDMA. As a basis we considered a 3D geometry ogether with a traffic model describing the UWB transmission activities. With the developed statistical interference model we computed the outage probability as a function of UWB device density. Maximum acceptable UWB device densities and outage probabilities were determined with respect to current FCC and ETSI emission limits. We finally chose an algorithm applying a Monte-Carlo simulation. Based on the results presented one can judge the performance of the narrowband cellular systems to resist the interference from mutiple UWB devices and the protection efficiency of current regulations by FCC and ETSI.更多还原