基于UWB定位系统的网络可扩展性应用与研究

发布时间：2018-02-24 09:39

本文关键词： 超宽带室内定位可扩展性时钟同步 TDOA　出处：《海南大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着无线通信技术的飞速发展和人们对定位服务的需求逐渐提高,室外定位GPS和GSM技术受房顶遮挡的影响,不能满足人们对室内定位服务的要求。虽然红外线、蓝牙、WiFi等技术已经应用于室内定位并取得一定的效果。但是,面对日趋饱和的频谱资源以及对定位系统精度、传输数据率和可扩展性的更高要求,上述的短距无线通信技术的研究逐渐进入瓶颈。在这样的背景条件下,高时间分辨率、带宽极宽的超宽带无线通信技术凸显出了较高的室内定位性能优势。由于超宽带无线技术发射功率低,因此超宽带信号的传输距离短。因此,目前大多数的超宽带室内定位应用研究是针对单个区域或较小范围而开展的。为了扩展超宽带定位系统的作用范围,本论文将对超宽带室内定位系统的网络可扩展性进行研究。研究工作主要从平稳定位显示结果、网络扩展和无线时钟同步这三个部分开展。其技术研究路线包含卡尔曼滤波平滑定位曲线、基站之间实现时间同步和无线网络主基站自适应选取这三点。论文研究基于Hainan-EVK 2000硬件平台,利用TDOA定位算法,在对一个包含四个扩展区域的楼层内进行定位测试。测试中对标签节点静置和移动两种不同运动状态进行逐个区域的定位系统的性能测试。从大量的定位误差、移动轨迹平稳性等特征值测试数据分析,其结果表明即使在有障碍物等遮挡的情况下,超宽带室内定位系统的各个扩展区域均能取得较好的定位结果。相对单一区域定位来说,误差增加相对较小。
[Abstract]:With the rapid development of wireless communication technology and the increasing demand for positioning service, outdoor positioning GPS and GSM technology can not meet the requirements of indoor positioning service because of the influence of roof occlusion. Bluetooth WiFi and other technologies have been applied to indoor positioning and achieved certain results. However, in the face of increasingly saturated spectrum resources and higher requirements for positioning system accuracy, data transmission rate and scalability, The research of the above short-range wireless communication technology has gradually entered the bottleneck. Under such background conditions, high time resolution, Ultra-wideband (UWB) wireless communication technology with very wide bandwidth highlights the advantages of high indoor positioning performance. Because of the low transmitting power of UWB wireless technology, the transmission distance of UWB signals is short. At present, most of the research on UWB indoor positioning applications is aimed at a single area or a small range. In order to expand the scope of UWB positioning system, This paper will study the network extensibility of UWB indoor positioning system. Network expansion and wireless clock synchronization. Its technical research route includes Kalman filter smooth positioning curve, Time synchronization between base stations and adaptive selection of main base station in wireless network are realized. Based on the hardware platform of Hainan-EVK 2000, using TDOA localization algorithm is studied. The performance of location-by-region localization system is tested for two different motion states of tag nodes, static and moving, from a large number of positioning errors to a large number of positioning errors, in which a location test is carried out on a floor containing four extended areas. The analysis of the test data of the stationary characteristic value of the moving trajectory shows that even under the condition of obstacle and so on, each extended area of the UWB indoor positioning system can obtain better localization results, compared with the single area location, the results show that the location of the UWB indoor positioning system is better than that of the single area location. The error increase is relatively small.
【学位授予单位】：海南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN925

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