| 摘要: |
| 在地面无线定位中，影响定位精度的最大因素是电波的非视距（NLOS）传播误差，定位估计前识别收发信机之间电波是视距（LOS）还是NLOS传播是提升定位精度需要研究的重要课题。为此，先对一种基于交叉面积的NLOS识别算法进行改进，然后提出了一种针对特殊几何精度因子（GDOP）场景下的NLOS识别算法——分步检验算法。该算法采用两步进行识别，先用数据检验筛选出测量样本中的LOS测量值，再用改进的交叉面积算法进行识别。仿真结果表明，分步检验算法在特殊GDOP场景下具有良好的识别性能。 |
| 关键词: 地面无线定位 非视距传播 特殊GDOP 分步检验 识别算法 交叉面积算法 |
| DOI： |
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| 基金项目: |
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| A NLOS propagation identification algorithm for special GDOP scene |
| DENG Shuifa,DENG Ping,RUI Yang |
| () |
| Abstract: |
| In ground-based wireless positioning,a crucial factor influencing the positioning accuracy is the non-line-of-sight(NLOS) error of radio propagation.Before location estimation，determining the radio propagation between transmitter and receiver is LOS or NLOS is an important issue for improving positioning accuracy. Firstly,a NLOS identification algorithm based on intersection area measurements is improved.Then,for special geometric dilution of precision(GDOP) scene，a NLOS identification algorithm named step by step test algorithm is proposed.This algorithm realizes the NLOS identification by two steps.The LOS measurements are selected by data test(DT) method in the first step,and then the improved intersection area measurements algorithm is utilized to make the identification in the second step. The simulation results show that this algorithm possesses high identification performance under special GDOP scene. |
| Key words: ground-based wireless positioning non-line-of-sight propagation special GDOP step by step test identification algorithm intersection area based algorithm |
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