| 一种改进的SEVB整数模糊度搜索算法 |
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| 引用本文： | 刘万科,马立烨,卢立果,李建龙.一种改进的SEVB整数模糊度搜索算法[J].测绘学报,2018,47(1):17-24. |
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| 作者姓名： | 刘万科 马立烨 卢立果 李建龙 |
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| 作者单位： | 1. 武汉大学测绘学院, 湖北 武汉 430079;2. 地球空间信息技术协同创新中心, 湖北 武汉 430079;3. 武汉大学地球空间环境与大地测量教育部重点实验室, 湖北 武汉 430079;4. 东华理工大学测绘工程学院, 江西 南昌 330013 |
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| 基金项目： | The National Natural Science Foundation of China，The Natural Science Foundation for Distinguished Young Scholar of Hubei Province，Jiangxi Natural Science Foundation of China ，湖北省杰出青年科学基金，江西省自然科学基金 |
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| 摘 要： | 针对浮点模糊度精度较差时SEVB算法存在搜索耗时较大的问题，提出一种改进的SEVB算法。该算法通过限制初始搜索空间大小和优化计算过程，能够有效减少模糊度搜索候选点个数和不必要的冗余计算，进而提高搜索效率。试验结果分析表明，当浮点模糊度解算精度较低时，改进算法的搜索效率比SEVB算法明显提高，且其搜索耗时不易受模糊度维数及精度的影响，具有更好的稳定性。
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| 关 键 词： | 模糊度解算 整数搜索 SEVB算法 Bootstrap成功率 搜索效率 |
| 收稿时间： | 2017-05-02 |
| 修稿时间： | 2017-10-17 |
A Modified SEVB Integer Ambiguity Search Algorithm |
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| LIU Wanke,MA Liye,LU Liguo,LI Jianlong.A Modified SEVB Integer Ambiguity Search Algorithm[J].Acta Geodaetica et Cartographica Sinica,2018,47(1):17-24. |
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| Authors: | LIU Wanke MA Liye LU Liguo LI Jianlong |
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| Institution: | 1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;2. Collaborative Innovation Centre for Geospatial Technology, Wuhan 430079, China;3. Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China;4. Faculty of Geomatics, East China University of Technology, Nanchang 330013, China |
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| Abstract: | A modified integer ambiguity search algorithm named MSEVB is proposed to overcome the disadvantage that SEVB algorithm is time-consuming under low float ambiguity precision.The proposed algorithm,by restricting initial search space and optimizing the calculation procedure,can effectively reduce the number of ambiguity candidates and redundant computation,so that the search efficiency is improved significantly.The experiment results indicate that MSEVB algorithm has significant improvement in search efficiency,compared with SEVB algorithm,when the precision of ambiguity resolution is low.Moreover,MSEVB algorithm is more insensitive to ambiguity dimension and precision,thus it has better performance in stability. |
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