改进的距离约束最小二乘模糊度搜索算法An improved length constrained least square ambiguity search algorithm assisted by LAMBDA method
高珊,张伟
摘要(Abstract):
针对短基线最小二乘模糊度搜索算法搜索效率低的缺点,该文提出了一种改善模糊度搜索空间以提高模糊度搜索效率的方法。最小二乘搜索算法通过基线长度范围确定模糊度搜索空间,完成模糊度的搜索和确认。距离约束的短基线模糊度搜索空间是一个空心椭球,各模糊度之间具有相关性,影响模糊度搜索效率。该文通过最小二乘去相关调整方法降低模糊度之间的相关性,减少搜索次数。实验证明,该算法的搜索效率提高了25%以上,且随着基线长度的增加,搜索效率有更多的提升。
关键词(KeyWords): 整周模糊度;最小二乘去相关调整方法;最小二乘搜索;距离约束
基金项目(Foundation):
作者(Author): 高珊,张伟
DOI: 10.16251/j.cnki.1009-2307.2016.02.029
参考文献(References):
- [1]HATCH R.Instantaneous ambiguity resolution[C]//Proceedings of KIS'90,Branff,Canada,September 10-13,1990:299-308.
- [2]HATCH R.Ambiguity resolution in the fast lane[C]//Proceedings of ION GPS-89,Colorado Springs,CO,September 27-29,1989:45-50.
- [3]FREI E,BEUTLER G.Rapid static positioning based on the fast ambiguity resolution approach FARA:theory and first results[J].Manuscripta Geodaetica,1990,15(6):325-356.
- [4]CHEN D.Fast ambiguity search filter(FASF):a novel concept from GPS ambiguity resolution[C]//Proceedings of the ION GPS-93,1993:781-787.
- [5]TEUNISSEN P J G.Least-squares estimation of the integer GPS ambiguities[C].Invited Lecture,Section IV Theory and Methodology,IAG General Meeting,Beijing,China,August,1993.
- [6]JONGE DE P J,TIBERIUS C C J M.The LAMBDA method for integer ambiguity estimation:implementation aspects[Z].Delft Geodetic Computing Centre LGR Series,No.12,Delft University of Technology,Netherlands,1996.
- [7]TEUNISSEN P J G.The least-squares ambiguity decorrelation adjustment:a method for fast GPS integer ambiguity estimation[J].Journal of Geodesy,1995,70(1/2):65-82.
- [8]TEUNISSEN P J G.The invertible GPS ambiguity transformations[J].Manuscripta Geodaetica,1995,20(6):489-497.
- [9]唐卫明,孙红星,刘经南.附有基线长度约束的单频数据单历元LAMBDA方法整周模糊度确定[J].武汉大学学报·信息科学版,2005:30(5):444-446.
- [10]吴腾飞.附有基线约束的GPS单频单历元定位算法研究[D].西安:长安大学,2014.
- [11]庞春雷,赵修斌,卢艳娥,等.短基线约束条件下的整周模糊度二维搜索算法[J].中国空间科学技术,2012,3(6):43-48.
- [12]陈辰,茅旭初.基于GPS技术的短基线快速定向方法及实现[J].计算机仿真,2012,10(10):80-83.
- [13]吴美平,胡小平,逯亮清.卫星定向技术[M].2版.北京:国防工业出版社,2013:78-80.
- [14]COLLINS P.An overview of GPS inter-frequency carrier phase combinations[Z].Technical Memorandum,1999.