| 基于改进TDOA算法的设计与仿真 |
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| 引用本文： | 吴端坡,李俊杰,许晓荣,冯维,刘兆霆.基于改进TDOA算法的设计与仿真[J].实验室研究与探索,2021(1). |
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| 作者姓名： | 吴端坡 李俊杰 许晓荣 冯维 刘兆霆 |
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| 作者单位： | ;1.杭州电子科技大学通信工程学院 |
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| 基金项目： | 教育部产学合作协同育人项目(201901284003);杭州电子科技大学通信工程学院院级教学研究改革项目(TXYB201804)。 |
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| 摘 要： | 为减弱信号传播中非视距等因素的影响,提高定位精度,提出改进到达时间差(TDOA)算法,给出了算法实现方案的流程和仿真对比结果。该算法在TDOA算法的基础上,融入了速度和区域约束,以此判断目标是否超出移动距离阈值或者区域边界,对定位结果进行优化。建模后对TDOA算法、速度受限定位算法、区域受限算法和改进TDOA算法进行了分析比较。结果表明:当测量目标的定位精度、最大移动速度和采样频率分别发生改变时,改进TDOA算法的定位精度较TDOA算法明显提高。该算法与其衍生算法(速度受限定位算法和区域受限定位算法)相比,成功融合了两种算法的优势,更好地提高了定位精度,实现了对非视距等定位误差的优化。
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| 关 键 词： | 室内定位 TDOA算法 速度受限 区域受限 |
Design and Simulation of Improved TDOA Algorithm |
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| WU Duanpo,LI Junjie,XU Xiaorong,FENG Wei,LIU Zhaoting.Design and Simulation of Improved TDOA Algorithm[J].Laboratory Research and Exploration,2021(1). |
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| Authors: | WU Duanpo LI Junjie XU Xiaorong FENG Wei LIU Zhaoting |
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| Institution: | (School of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China) |
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| Abstract: | In order to reduce the influence of non-line-of-sight and other factors in signal propagation and improve the positioning accuracy,an improved time difference of arrival(TDOA)algorithm is proposed.The flow chart of improved algorithm implementation and the result of simulation are given.Based on the TDOA algorithm,the proposed algorithm incorporates speed and area limitation to judge whether the target exceeds the moving distance threshold or the region boundary,and then optimizes the positioning results.After modeling,the TDOA algorithm,speed limited positioning algorithm,region limited algorithm and improved TDOA algorithm are analyzed and compared.The results show that the positioning accuracy of the improved TDOA algorithm is significantly higher than that of the TDOA algorithm when the positioning accuracy,maximum moving speed and sampling frequency of the measurement target are changed,respectively.In addition,compared with the derived algorithms(speed limited positioning algorithm and area limited positioning algorithm),the improved algorithm successfully integrates the advantages of the two algorithms,improves the positioning accuracy and optimizes the positioning errors caused by non-line-of-sight etc. |
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| Keywords: | indoor positioning TDOA algorithm speed limitation area limitation |
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