| 引用本文: | 靖守让,李柏渝,刘文祥,等.地球静止轨道粗定位的北斗系统接收机快速定位方法.[J].国防科技大学学报,2015,37(4):77-81.[点击复制] |
| JING Shourang,LI Baiyu,LIU Wenxiang,et al.A quick location method for BDS receiver based on coarse positioning by GEO constellation[J].Journal of National University of Defense Technology,2015,37(4):77-81[点击复制] |
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| 地球静止轨道粗定位的北斗系统接收机快速定位方法 |
| 靖守让, 李柏渝, 刘文祥, 孙广富 |
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(国防科技大学 电子科学与工程学院， 湖南 长沙 410073)
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| 摘要: |
| 传统全球导航卫星系统信号发射时间的整毫秒恢复算法，在接收机概略位置未知时存在计算量剧增而无法应用的问题。利用北斗系统混合星座中GEO卫星电文速率高的这一特点，提出一种基于GEO粗定位的北斗接收机快速定位的方法。在接收机概略位置完全未知的情况下，使用已获取完整信号发射时刻的纯GEO星座进行粗定位，根据解算获得的概略位置对非GEO卫星发射时刻毫秒整数时间进行恢复，利用所有可见卫星进行精确定位。使用国际全球连续监测评估系统测站观测伪距对算法进行验证，国内测站可100%实现伪距恢复，完成快速定位。仿真遍历中国区域用户，在仿真伪距增加均值为0，标准差为6m噪声，截止仰角为0°时，中国附近区域实现快速定位概率均大于98.68%，其中约80%的中国附近区域可以100%实现卫星信号传输时间恢复并完成快速定位。 |
| 关键词: 北斗卫星导航系统 地球静止轨道星座 信号传输时间恢复 首次定位时间 |
| DOI：10.11887/j.cn.201504013 |
| 投稿日期：2014-09-17 |
| 基金项目:教育部新世纪人才支持计划资助项目（NCET-08-0144） |
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| A quick location method for BDS receiver based on coarse positioning by GEO constellation |
| JING Shourang, LI Baiyu, LIU Wenxiang, SUN Guangfu |
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(College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Without knowing the approximate position of the receiver, the millisecond recovery algorithm of traditional global navigation satellite system signal-radiation existed problem of increasing computation, but unable to be applied. A fast positioning method for BDS receiver was proposed according to the high navigation data rate of GEO(Geosynchronous Earth Orbit) satellites in BeiDou Navigation Satellite System. Firstly, an approximate position was got by coarse positioning using GEO constellation. Then the signal transmission time recovery of MEO/IGSO satellite was made according to the approximate position. Finally, all the visible satellites were used for precise positioning. Using iGMAS stations observation pseudorange to verify the proposed algorithm. The stations in China can 100% got full-pseudorange and obtained fast positioning. By using BDS broadcast ephemeris data, a simulation environment was built. The white noise with 6 meters standard deviation is added to satellites pseudorang. And the cut-off angle of elevation is 0°. The success rate of the quick location method is bigger than 98.68%. And about 80% of Chinese surrounding area can 100% guarantee a complete satellite signal emission time restoration and obtain an accurate position. |
| Keywords: BeiDou navigation satellite system geosynchronous earth orbit constellation signal transmission time recovery time to first fix |
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