测绘学报 ›› 2019, Vol. 48 ›› Issue (3): 295-302.doi: 10.11947/j.AGCS.2019.20180379

• 大地测量学与导航 • 上一篇    下一篇

北斗中长基线三频模糊度解算的自适应抗差滤波算法

高扬骏, 吕志伟, 周朋进, 贾铮洋, 张伦东, 丛佃伟   

  1. 信息工程大学地理空间信息学院, 河南 郑州 450001
  • 收稿日期:2018-08-22 修回日期:2018-12-20 出版日期:2019-03-20 发布日期:2019-04-10
  • 通讯作者: 吕志伟 E-mail:lvzhiwei@sina.com
  • 作者简介:高扬骏(1995-),男,硕士生,研究方向为卫星导航。E-mail:951242669@qq.com

Adaptive robust filtering algorithm for BDS medium and long baseline three carrier ambiguity resolution

GAO Yangjun, LÜ Zhiwei, ZHOU Pengjin, JIA Zhengyang, ZHANG Lundong, CONG Dianwei   

  1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450001, China
  • Received:2018-08-22 Revised:2018-12-20 Online:2019-03-20 Published:2019-04-10

摘要:

针对经典TCAR(three carrier ambiguity resolution)算法受电离层延迟及测量噪声的影响,在中长基线下难以正确固定模糊度的问题,提出一种顾及电离层延迟影响并具有良好自适应抗差特性的改进TCAR算法。在无几何TCAR模型的基础上,通过对模糊度固定的超宽巷进行线性组合得到电离层延迟,再求解宽巷模糊度,通过构造最优组合观测量后用自适应抗差滤波求解窄巷模糊度,以提高窄巷模糊度固定正确率,减小粗差的不利影响。试验结果表明,改进TCAR算法可保证较高的宽巷模糊度固定正确率,有效提高了窄巷模糊度固定正确率,并具有良好抵抗粗差的能力。

关键词: 自适应抗差滤波, 北斗, 宽巷, 窄巷, 模糊度, TCAR

Abstract:

For classical TCAR(three carrier ambiguity resolution) algorithm is affected by ionospheric delay and measurement noise, it is difficult to reliably fix ambiguity at medium and long baselines. An improved TCAR algorithm which takes the influence of ionospheric delay into account and has good adaptive robustness is proposed. On the basis of non-geometric TCAR model, ionospheric delay is obtained by linearly combining extra-wide-lane with fixed ambiguity, and then wide-lane ambiguity is solved.Solving narrow-lane ambiguity by adaptive robust filtering by constructing optimal combination observation, which can effectively improve fixed success rate of narrow-lane ambiguity and reduce the adverse effects of gross error. Experimental results show that improved TCAR algorithm can guarantee high fixed correct rate of wide-lane ambiguity, effectively improve fixed success rate of narrow-lane ambiguity, and has good ability to resist gross error.

Key words: adaptive robust filter, Beidou, wide-lane, narrow-lane, ambiguity, TCAR

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