Satellite selection algorithm for combined satellite receivers
-
摘要: 分析了五阶矩阵的行列式值与5颗星GDOP(Geometry Dilution of Precision)值的关系,并由此提出了一种用于双卫星星座组合接收机(如GPS(Global Position System)和BD2(BeiDou2)组合接收机)中的选星算法——组合优选法.该方法首先选出行列式绝对值最大的几种组合,然后根据需要对每种组合从其余可见星中选出几颗最优星,最后根据GDOP最小原则从这几种组合中选取最终结果.计算机仿真结果显示该方法与直接利用GDOP选星相比,95％以上的GDOP相对比值小于5％,而计算量减小40％以上.Abstract: On the basis of the relationship between the determinant of a 5×5 matrix and five satellites- geometry dilution of precision(GDOP), a method of selecting satellites for double constellation combined receiver (e.g. GPS(global position system) and BD2(BeiDou2) combined receiver) was proposed. With this algorithm, firstly several combinations of the maximal determinant were computed, then some optimal satellites from other visible satellites for each combination were chosen according to need, lastly according to the least GDOP principle the final result was selected from previous combinations. Computer simulations indicate that compared to directly using GDOP to select satellites, more than 95% of relative ratio are lower than 5%, while computation burden reduces more than 40% with this method.
-
Key words:
- global position system /
- navigation systems /
- algorithm /
- combined constellation
-
[1] Belabbas B, Hornbostel A, Sadeque MZ, et al. Accuracy study of a single frequency receiver using a combined GPS/GALILEO constellation Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation. Long Beach, CA, United States: Institute of Navigation, 2005:1022-1033 [2] Januszewski Jacek. Geometry and visibility of satellite navigation systems in restricted area Proceedings of 2005 National Technical Meeting, NTM 2005. San Diego, CA, United States: Institute of Navigation, 2005:827-839 [3] Kihara M, Okada T. A satellite selection method and accuracy for the global positioning system[J]. Navigation, Journal of The Institute of Navigation, 1984,31(1): 8~20 [4] Esmond Mok,Paul A. A fast satellite selection algorithm for combined GPS and GLONASS receivers[J]. Navigation, Journal of The Institute of Navigation, 2000,47(3): 383-389 [5] 常青,柳重堪,张其善. 基于最小二乘递推估计的GPS定位算法[J]. 北京航空航天大学学报, 1998,24(3):263-266 Chang Qing, Liu Zhongkan, Zhang Qishan. GPS positioning algorithm based on least square recurrence estimate[J]. Journal of Beijing University of Aeronautics and Astronautics, 1998,24(3):263-266(in Chinese) [6] 初海彬. 多种卫星导航定位系统共用关键技术研究 . 哈尔滨:哈尔滨工业大学电子与信息技术研究院,2004 Chu Haibin. Key techniques of multiple satellite navigation and positioning system integration . Harbin: School of Electronic and Information Technology, Harbin Institute of Technology, 2004 (in Chinese) -
点击查看大图
计量
- 文章访问数: 4606
- HTML全文浏览量: 168
- PDF下载量: 1408
- 被引次数: 0
下载:
