| 基于抗差Chebyshev多项式的相位伪距周跳探测与修复算法 |
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| 引用本文： | 王建,张献州,李伟.基于抗差Chebyshev多项式的相位伪距周跳探测与修复算法[J].测绘与空间地理信息,2012,35(9):26-28,32. |
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| 作者姓名： | 王建 张献州 李伟 |
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| 作者单位： | 西南交通大学地球科学与环境工程学院,四川成都,610031 |
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| 基金项目： | 中央高校基本科研业务费专项资金项目--空问信息获取与建模及其在高速铁路中的应用 |
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| 摘 要： | 相位伪距组合(1,-1)受多路径变化和电离层延迟的影响,周跳探测精度为2周,严重影响了传统相位伪距法的周跳探测性能。针对这一问题,利用基于抗差估计的Chebyshev多项式对各备选周跳的观测值进行拟合,依据残差和最小的原则,准确判别出原始相位的周跳值。实例验证该方法实用性强,可靠性高,相比传统相位伪距法具有更好的周跳探测与修复能力。
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| 关 键 词： | 周跳 抗差估计 Chebyshev多项式 探测与修复 |
Cycle Slip Detection and Recovery Based on Chebyshev Polynomial of Robust Estimation |
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| WANG Jian,ZHANG Xian - zhou,LI Wei.Cycle Slip Detection and Recovery Based on Chebyshev Polynomial of Robust Estimation[J].Geomatics & Spatial Information Technology,2012,35(9):26-28,32. |
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| Authors: | WANG Jian ZHANG Xian - zhou LI Wei |
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| Institution: | (Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 610031 ,China) |
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| Abstract: | By the effects of pseudorange muhipath and ionospheric delay, the detection accuracy of cycle slips using the phase combi- nation （ 1, - 1 ） is about two cycles, which has a serious impact on the ability of using pseudo range and carrier phase combination to detect and repair cycle slips. To resolve this problem, a new method which takes into account of the robust estimation and uses the Chebyshev polynomial based on sliding window to fit the single different observations of each cycle slip is proposed. This method is a- ble to discriminate the true cycle slips of L1 - frequency and L2 - frequency carrier phase under the principle of minimum residual er- ror. The experiment results show that the new method has better reliability and success rate than the traditional one. |
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| Keywords: | cycle slip robust estimation Chebyshev polynomial detecting and correcting |
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