【作者】 赵婧；

【导师】 王玉良；

【作者基本信息】 北京邮电大学 ， 信号与信息处理， 2011， 硕士

【摘要】 随着第三代(3G)移动通信的发展和美国E911规定的颁布,蜂窝网络移动台(MS)无线定位技术得到了越来越广泛的注视。该服务能够提供有关移动台位置的信息。因此,在很多领域有着重要的应用,如网络优化、娱乐、紧急救护和国家安全等。同时,无线传播信道的复杂性又决定了蜂窝无线定位技术会面临很多困难。如何提高定位精度以更好地服务于大众已成为国际上相关领域的研究重点。WCDMA全称为Wideband CDMA,也称为CDMA Direct Spread,意为宽频码分多重存取,这是基于GSM网发展出来的3G技术规范,是欧洲提出的宽带CDMA技术。它有较高的扩频增益,发展空间较大,全球漫游能力最强,技术成熟性最佳。它以宽带伪随机(PN)序列来区分用户。不同用户在频率和时间上共享,提高了资源的利用率。因此,本文针对WCDMA蜂窝网络,采用到达时间／时间差(TOA/TDOA)定位方式,以提高移动台定位精度为目标,从被动定位的角度出发,在定位性能参数、影响定位精度的因素、TDOA定位方式的多种算法、非视距(NLOS)环境下的定位算法等几个方面深入研究蜂窝网络移动台的无线定位技术。首先,本文在理论分析和数据支持的基础上明确了技术路线和研究内容。论文简略地讨论了常用的定位算法,定性地比较了它们的性能；详细地分析了WCDMA蜂窝无线网络的特点,确立了移动台定位误差的来源；概括了目前国内外蜂窝无线定位技术的研究现状；进而通过综合分析,确定了研究的方法和重点。其次,在深入研究TOA算法和TDOA算法后,搭建了WCDMA的仿真平台,分别对TOA算法中LOS和NLOS的两种情况进行仿真,对TDOA定位方式下的四种算法进行仿真,通过改变基站数目,观察定位误差方差的改变。仿真结果比较了各种算法的定位性能,分析了各种算法的优缺点,有利于在实际应用中选用合适的算法。更多还原

【Abstract】 With the third-generation (3G) mobile communications development and promulgation of the provisions of the U.S. E911, cellular network mobile station (MS)wireless location technology has been more and more widely watched. The service can provide information about the location of the mobile station. Therefore, in many fields has important applications, such as network optimization, entertainment, emergency and national security. Meanwhile, the wireless propagation channel in turn determines the complexity of cellular location technology will face many difficulties. How to improve the positioning accuracy to better serve the public has become the international focus on research in related fields.The full name of WCDMA Wideband CDMA, also known as CDMA Direct Spread, intended for the wideband code division multiple access, which is based on the GSM network developed 3G technology standard, is Europe’s wideband CDMA technology. It has a high spreading gain, the development of larger space, the strongest global roaming capabilities, technical maturity of the best. It wideband pseudo-random (PN) sequence to differentiate between users. Different users sharing the frequency and time, improve resource utilization. Therefore, this paper WCDMA cellular network, using time of arrival/ time difference (TOA/TDOA)positioning methods to improve the mobile station positioning accuracy as the goal, from passive positioning point of view, the positioning performance parameters, affect the positioning accuracy of the factors, TDOA Location The way a variety of algorithms, non line of sight (NLOS) environment, the positioning algorithm-depth study of several aspects of cellular mobile wireless location technology.Firstly, the theoretical analysis and data support on the basis of clear technology roadmap and research content. Paper briefly discusses the positioning algorithmused qualitatively compare their performance; a detailed analysis of the characteristics of WCDMA cellular radio network, established a mobile station positioning error sources; summarizes the cellular location technology at home and abroad Research Status; and then through a comprehensive analysis to determine the research methods and priorities.Secondly, in-depth study of TOA and TDOA algorithms algorithms, the structures of the WCDMA simulation platform, respectively, LOS and NLOS TOA algorithm to simulate the two cases of the four TDOA positioning algorithm under the simulation, by changing the number of base stations To observe the change in location error variance.更多还原