摘要
基于超宽带(UWB)技术的定位系统以性价比高、抗干扰能力强等优势在室内无线定位系统中占有重要地位。UWB无线定位的测距误差受晶振偏差和多径效应等影响。基于双向到达时间(TW-TOA)的方法设计了一种高精度UWB室内定位系统,首先介绍了UWB定位系统原理,然后分析系统时钟偏差对测距误差的影响,进行软硬件设计,为减轻多径影响系统采用BP神经网络进行数据处理,最后进行测试和验证。测试结果表明:该定位系统的定位精度高,多径影响小。
In indoor wireless localization system,the localization based on ultra-wideband technology has the advantages of goodcost performance and strong anti-interference ability. The frequency offset of crystal oscillator and multipath effect affect the ranging error of UWB wireless location. A high-accuracy localization system is designed based on TW-TOA method. Firstly the UWB location method is introduced. And the system performance is analyzed. Then the paper illustrates the design of hardware and software. The data processed by neural network is used to decrease the influence of multipath. Finally the paper shows the results of test and verification. The results show that the UWB indoor positioning system based on neural network can achieve high level localization accuracy and low multipath effect.
出处
《计量与测试技术》
2019年第4期18-21,共4页
Metrology & Measurement Technique
基金
青岛黄海学院博士科研启动经费项目(2016boshi03)
