Applications of differential barometric altimeter in ground cellular communication positioning network
Applications of differential barometric altimeter in ground cellular communication positioning network
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DOI：
10.1049/iet-smt.2018.5316
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发表时间：
2020-05
影响因子：
1.4
通讯作者：
Zhengqun Hu;Lirong Zhang;Yuanfa Ji
中科院分区：
文献类型：
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作者：
Zhengqun Hu;Lirong Zhang;Yuanfa Ji
由于测量基准分布的特点，GPS（全球定位系统）的高度定位误差较大。本文从系统实现层面对差分气压测高系统进行了探讨，从差分气压测高系统实现层面为连续、精确的高度测量提供了关键技术解决方案，为GPS提供了很好的补充和增强。设计了信号报文结构，给出了扩频测距信号的功率谱，实现了导航与通信的融合。构造了压力和温度（P，T）的二维曲面拟合函数，利用最小二乘解计算拟合参数，实现了传感器的标定补偿和测量修正。分析了卡尔曼滤波中系统噪声方差矩阵Qk和量测噪声方差矩阵Rk对滤波效果的影响。提出了一种多基站校正算法，通过多基站间的无缝切换，实现了测量站高度信息的校正计算。实验结果表明，DBA系统中的关键技术解决方案能够取得较好的系统性能。
Due to the characteristics of measurement datum distribution, the altitude positioning error of GPS (Global Positioning System) is relatively large. This study discusses a differential barometric altimetry (DBA) system from systematic implementation level and provides a key technical solution for the continuous and precise altitude measurement from the DBA systematic implementation aspect, which can provide a good supplement and enhancement for GPS. The structure of signal message is designed; the power spectrum of spread spectrum ranging signal is given, and the fusion of navigation and communication is realised. The two dimensional curved surface fitting function of pressure and temperature (P, T) is constructed, and the fitting parameters are calculated by the least-square solution, which can realise calibration compensation and measurement correction of sensor. The influence of the system noise variance matrix Q k and the measurement noise variance matrix R k on the filtering effect in Kalman filter is analysed. An algorithm of multi-base station (BS) correction is proposed, which can realise the height information correction calculation in measuring station (MS) via seamless handover between multi-BSs. The experimental results show that the key technology solutions in DBA system can achieve a well systematic performance..