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为了提高智能手机在遮挡环境下的定位精度和可靠性，给出一种全球定位系统（GPS）、伽利略卫星导航系统（Galileo）、北斗卫星导航系统（BDS）组合的系统间紧组合伪距差分定位模型和适用于智能手机的高度角附加不确定度的随机模型。首先评估了L1/B1I和L1/E1频率间的伪距差分系统间偏差的大小与稳定性，结果表明，智能手机伪距差分系统间偏差可以保持稳定性。利用小米8、华为P40智能手机和实测相同及不同类型接收机进行对比验证，通过设置截止高度角方式模拟遮挡环境。实验结果表明：在45°截止高度角模拟遮挡环境情况下，应用紧组合伪距差分改正模型，小米8和华为P40智能手机平面定位精度分别提高了25.5%和32.4%。该方法可以提高智能手机在遮挡环境下定位的精度和可靠性。
Abstract：In order to enhance the positioning accuracy and reliability of smart phones in the occluded environment, a combined inter-system tightly combined pseudorange differential positioning model of the global positioning system(GPS),Galileo satellite navigation system(Galileo), and BeiDou navigation satellite system(BDS), as well as a random model with height angle additional uncertainty suitable for smart phones, was provided. Firstly, the size and stability of the inter-system bias of the pseudorange differential between the L1/B1I and L1/E1 frequencies were evaluated, and the results showed that the intersystem bias of the smart phone pseudorange differential system could maintain stability. By using the Xiaomi 8 and Huawei P40smart phones and actually measuring the same and different types of receivers for comparative verification, the occluded environment by setting the cutoff altitude angle was simulated. The experimental results showed that: in the case of simulating the occluded environment with a 45° cutoff altitude angle and applying the tightly combined pseudorange differential correction model, the plane positioning accuracy of the Xiaomi 8 and Huawei P40 smart phones had been increased by 25.5% and 32.4%,respectively. This method could improve the positioning accuracy and reliability of smart phones in the occluded environment.
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基本信息:
DOI：10.16547/j.cnki.10-1096.20240408
中图分类号:TN929.5;TN967.2
引用信息:
[1]李玉星,李广云,吕葳,等.顾及DISB的智能手机伪距差分定位算法[J].导航定位学报,2024,12(04):68-78.DOI:10.16547/j.cnki.10-1096.20240408.
2024-08-20
2024-08-20