基于比较算法和OWR-TDOA的IR-UWB定位系统研究  

Research on IR-UWB positioning system based on comparison algorithm and OWR-TDOA

作　　者：姜世超 王新民 Jiang Shichao;Wang Xinmin(School of Information Engineering,Changchun University of Finance and Economics,Changchun 130122,China;School of Mathematics and Statistics,Changchun University of Technology,Changchun 130012,China)

机构地区：[1]长春财经学院信息工程学院,长春130122 [2]长春工业大学数学与统计学院,长春130012

出　　处：《国外电子测量技术》2023年第3期102-109,共8页Foreign Electronic Measurement Technology

基　　金：国家自然科学基金(51278065);吉林省教育厅科学研究项目(JJKH20231410KJ)资助。

摘　　要：针对采用脉冲无线电-超宽带实现高精度定位进行了研究。首先提出了基于现场可编程门阵列板的全数字发射机,由其I/O口产生并输出脉冲信号;然后脉冲信号通过接收天线接收,并由每个接收支路上的低噪声放大器放大,通过比较算法将脉冲信号转换为1位数字样本;为了降低噪声功率,将数字化后的样本按脉冲帧的相应相位进行平均,并将平均后的脉冲样本与模板信号进行关联,将相关器输出与阈值进行比较,接收机通过检测超过阈值的相关器输出来估计脉冲信号的定时;最后,处理单元根据单向测距-到达时间差方法估计出发射机的位置。实验测试结果不仅验证了提出的定位系统的有效性,而且表明了提出的定位系统相比于传统的基于模数变换器的接收处理系统在发射机定位均方根(RMS)误差和模态值的RMS误差方面分别提高了41.48%和23.11%。In this paper,the implementation of high precision positioning using impulse radio-ultra wideband is studied.Firstly,an all-digital transmitter based on field programmable gate array board is proposed,which generates and outputs pulse signals from its I/O port.Then,the pulse signal is received by the receiving antenna and amplified by the low noise amplifier on each receiving branch.The pulse signal is converted into a 1-bit digital sample by a comparison algorithm.In order to reduce the noise power,the digitized samples are averaged according to the corresponding phase of the pulse frame,and the averaged pulse samples are correlated with the template signal,and the correlator output is compared with a threshold.The receiver estimates the timing of the pulse signal by detecting the correlator output that exceeds the threshold.Finally,the processing unit estimates the position of the transmitter by the one way ranging-time difference of arrival method.The experimental results not only verify the effectiveness of the proposed positioning system,but also show that the proposed positioning system has a 41.48%and 23.11%increase in the positioning RMS error of transmitter and the RMS error of modal value,respectively,compared with the traditional receiver processing system based on an analog-to-digital converter.

关 键 词：脉冲无线电 超宽带 现场可编程门阵列 低噪声放大器 单向测距-到达时间差 相关性 定位误差 

分 类 号：TN914[电子电信—通信与信息系统]