测绘通报 ›› 2019, Vol. 0 ›› Issue (3): 6-10,60.doi: 10.13474/j.cnki.11-2246.2019.0068

• 学术研究 • 上一篇    下一篇

顾及有色噪声影响的位置域双频载波相位平滑伪距算法

骆飞, 常国宾, 陈超   

  1. 中国矿业大学环境与测绘学院, 江苏 徐州 221116
  • 收稿日期:2018-04-09 出版日期:2019-03-25 发布日期:2019-04-02
  • 作者简介:骆飞(1994-),男,硕士生,主要从事GNSS数据处理。E-mail:luofeicumt2016@163.com
  • 基金资助:
    国家自然科学基金(41774005)

Position domain dual-frequency carrier smoothed code filter with colored noise

LUO Fei, CHANG Guobin, CHEN Chao   

  1. School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
  • Received:2018-04-09 Online:2019-03-25 Published:2019-04-02

摘要: 载波平滑伪距技术是一种有效的GNSS数据处理技术,在很多高精度实时定位场合得到了广泛的应用。本文在随机模型中考虑载波相位时间差分观测量中有限冲激响应有色观测噪声的影响,推导出采用递归最小二乘方法的距离域和位置域双频载波相位平滑伪距算法,并利用实测数据验证了新算法的有效性。试验表明,相位平滑伪距能够减小伪距观测值的误差,提高伪距观测量的精度,从而提高定位精度;相对于传统的算法,距离域与位置域滤波的伪距平滑精度均有提高,三维定位误差精度均得到改善;同时表明,载波相位时间差分的有色噪声对平滑效果和定位精度有一定的影响。

关键词: 双频载波相位平滑伪距, 距离域, 位置域, 递归最小二乘, 有色噪声

Abstract: Carrier smoothing code algorithm is an effective data processing technology in global navigation satellite system,which has been widely used in many high-precision real-time applications.In the traditional algorithms,the colored noise of the time-differenced carrier phase is neglected.In order to resolve this issue,a range domain and position domain dual-frequency carrier smoothed code algorithm under the condition of colored noise with the finite impulse response in the recursive least-squares theory framework are proposed.Firstly,the conventional dual-frequency carrier smoothed code algorithm is introduced.Based on this,the algorithms of range domain and position domain carrier smoothed code in the recursive least-squares theory as well as the influence of colored noise are given.A real GPS experiment was made to test the validity of new algorithm.Experiment results indicate the carrier smooth code algorithm is able to improve the precision of pseudo-range observations.Compared with the conventional algorithm,both the smoothing accuracy of range domain filtering and position domain filtering are improved,the accuracy of 3-dimensional positioning error is improved.At the same time,it shows that the colored noise of the time-differenced carrier phase has a certain influence on the smoothing accuracy.

Key words: dual-frequency carrier smoothed code, range domain, position domain, recursive least-squares estimate, colored noise

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