| 摘要: |
| NLOS (Non-line of Sight)误差是定位中的主要误差来源，直接影响了定位的精度
。在MIMO（Multiple Input Multiple Output）系统中，基于NLOS信道模型的定位方法成为
解决NLOS定位误差问题的利器。基于此提出一种新颖的几何方法，仅采用两条NLOS路径就可
计算MS(Mobile Station)的位置，并且只需要利用单个基站便可完成MS的定位，克服了基站
数目过少无法准确定位MS的缺陷。在此基础上，还给出了最小二乘与最大似然算法利用多条
NLOS路径来改善定位精度的方法，并利用它对NLOS环境下运动的MS进行定位跟踪。理论分析
和仿真结
果都证明该定位方法在NLOS环境中对MS定位的有效性与精确度。 |
| 关键词: 移动定位 NLOS误差 信道模型 MIMO系统 几何方法 精确度 |
| DOI： |
|
| 基金项目: |
|
| Mobile Station Position and Rate Estimation Under NLOS Environment |
| XU Yan-ying,BAO Song-jian |
| (Chongqing Creation Vocational College,Chongqing 402160,China;Chongqing University of Arts and Sciences,Chongqing 402160,China) |
| Abstract: |
| The NLOS(Non-line of Sight) error is the dominant error source, which has negati
ve influence on the positioning
accuracy. In the MIMO system, the location method based on the NLOS channel
model has become an effective solution to resist NLOS error. On this base,a
novel geometric method is proposed which can calculate the position of MS(Mobile
Station) with two NLOS path
s and only one BS(Base Station) is needed to implement positioning, thu
s overcoming the limitation of shortness of the participating BSs. Then, LS
algorithm and ML algorithm are given to improve the positioning accuracy with s
eve
ral NLOS paths.The geometric location method is used to locate and trace the mov
ing MS. The theoretical analysis and simulation results prove the validity and a
ccuracy of the method in positioning MS under NLOS environment. |
| Key words: NLOS error channel model MIMO system geometric method accuracy |
《电讯技术》编辑部 