| 一种新的XPNAV系统解整周模糊度搜索算法 |
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| 引用本文： | 张华,许录平,谢强.一种新的XPNAV系统解整周模糊度搜索算法[J].武汉大学学报(信息科学版),2011(1):39-43. |
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| 作者姓名： | 张华 许录平 谢强 |
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| 作者单位： | 西安电子科技大学电子工程学院; |
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| 基金项目： | 国家863计划资助项目(2007AA12Z323); 国家自然科学基金资助项目(60772139) |
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| 摘 要： | 提出了一种新的XPNAV系统解相位模糊度搜索算法,依据检核脉冲星的特征周期,将正确的模糊向量限定在多个子空间内,使用线性搜索寻找子空间种子向量,采用基于满二叉树的穷举搜索算法遍历子空间中向量,并建立向量间的关系。理论分析和仿真实验表明,新的解相位模糊度算法能显著降低系统的运算量,计算过程中的矩阵均是由脉冲星特征属性决定的常数矩阵,便于工程实现,此外二叉树搜索方法还能用于并行计算。
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| 关 键 词： | 自主天文导航 脉冲星 XPNAV 相位模糊度 满二叉树 |
A Search Algorithm of Phase Ambiguity Resolution for XPNAV Based on Binary Tree |
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| ZHANG Hua XU Luping XIE Qiang.A Search Algorithm of Phase Ambiguity Resolution for XPNAV Based on Binary Tree[J].Geomatics and Information Science of Wuhan University,2011(1):39-43. |
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| Authors: | ZHANG Hua XU Luping XIE Qiang |
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| Institution: | ZHANG Hua1 XU Luping1 XIE Qiang1 (1 School of Electronic Engineering,Xidian University,2 South Taibai Road,Xi'an 710071,China) |
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| Abstract: | The space search method of X-ray Pulsar Navigation(XPNAV) system ambiguity resolution tests all the vectors in the space,which results in its high complex computation.A new XPNAV system ambiguity resolution algorithm was presented,which limited the correct ambiguity vector to subspaces according to pulsar characteristic period and found the seed vectors of the subspaces using linear search method.Then,the subspace was traversed using exhaustive algorithm based on full binary tree,and the relation among the ... |
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| Keywords: | autonomous celestial navigation pulsar XPNAV phase ambiguity resolution full binary tree |
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