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首页> 外文会议>International technical meeting of the Satellite Division of the Institute of Navigation >Navigation Performance Using Long-Term Ephemeris Extension for Mobile Device
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Navigation Performance Using Long-Term Ephemeris Extension for Mobile Device

机译：使用长期星历扩展功能的移动设备的导航性能

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Long-term ephemeris extension is needed in challengingenvironments in order to reduce the Time-To-First-Fixed(TTFF). It makes quick position fix possible for mobiledevices while they are still acquiring the broadcastephemeris. Based on the experiment results described inthis paper, the median User Range Error (URE) for theextended ephemeris after one week and four weeks is5.68m and 88.98m, respectively. Simulated signalobstruction experiments are also conducted to assess theposition fix accuracy, availability and reliability based ondifferent mean square positional error (MSPE) thresholds,prediction durations and obstruction scenarios. The resultshave shown 95.57% navigation availability at 99.28%reliability with one obstruction and 83.37% navigationavailability at 97.12% reliability with two obstructionsbased on a user-defined MSPE of 50m after one weekprediction.
机译：挑战中需要长期扩展星历表 环境以减少首次修复时间 （TTFF）。它使手机快速定位成为可能 设备仍在获取广播时 星历。根据实验结果所述 在本文中， 1周和4周后的扩展星历是 分别为5.68m和88.98m。模拟信号 还进行了阻塞实验来评估 定位精度，可用性和可靠性基于 不同的均方根位置误差（MSPE）阈值， 预测持续时间和障碍场景。结果 已显示95.57％的导航可用性为99.28％ 一道障碍物和83.37％的导航可靠性 具有两个障碍物，可实现97.12％的可靠性 根据一周后用户定义的50m MSPE 预言。

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