改进型双频相关的整周模糊度单历元解算算法  

Improved single epoch ambiguity resolution algorithm based on the dual frequency correlation method

作　　者：权源[1,2] 赵修斌 庞春雷[1] 张豪[1] 王勇[1] 伍劭实[1] QUAN Yuan;ZHAO Xiubin;PANG Chunlei;ZHANG Hao;WANG Yong;WU Shaoshi(Information and Navigation College,Air Force Engineering Univ.,Xi＇an 710077,China;Air Force Communication NCO Academy,Dalian 116000,China)

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077 [2]空军通信士官学校,辽宁大连116000

出　　处：《西安电子科技大学学报》2018年第6期130-136,共7页Journal of Xidian University

基　　金：国家自然科学基金青年基金资助项目(61601506)

摘　　要：双频相关法根据双频载波相位测量值之间的相关特性,通过构造模糊度误差带实现了对整周模糊度的快速解算.但由于该算法需要提前设定伪距测量精度,易导致模糊度真值漏搜或者误差带筛选效率下降.基于此,提出了一种改进算法:首先利用基线长度与观测向量信息构造双差几何相关模型,从而定量解算整周模糊度搜索范围;随后分析了模糊度搜索空间稀疏性与载波相位波长、误差带带长、误差带带宽之间的相互关系;最后采用宽巷整周模糊度作为误差带坐标系的横轴,以进一步增强搜索空间稀疏性.多次试验结果表明,在单历元情形下,改进算法的单维模糊度平均筛选效率提高85.71%,平均解算耗时缩短至原先的0.46%,成功率由95.28%提高至99.78%,有效地提高了模糊度解算的快速性与可靠性.The dual frequency correlation method which is based on the relevant characteristic of dual frequency carrier phase measurement constructs the ambiguity error band to fix integer ambiguity quickly. However, the algorithm needs to set the pseudo range measurement accuracy in advance, which results in a false ambiguity search scope or an ineffective filter efficiency easily. First, the information on the baseline length and the gaze vector is utilized to derive the double difference geometric correlation model in order to obtain the integer ambiguity search range quantitatively. Then, the relationship among the sparsity of integer ambiguity search space, carrier phase wavelength, length and bandwidth of the error band arc analyzed, Finally, the search range of the wide lane ambiguity is regarded as the horizontal axis of the error band axis to strengthen the sparsityof the search space. Consequently, an improved single epoch ambiguity resolution algorithm based on the dual frequency correlation method is proposed. Compared with the original algorithm in the single epoch, experimental results show that the average constringent rate of single dimensional ambiguity increases to 85.71% , that the average computational cost is reduced to 0. 46%, and that the success rate is increased from 95.28% to 99.78%, which greatly improves the reliability of ambiguity solution.

关 键 词：双频相关法 误差带 宽巷组合 基线长度 整周模糊度 

分 类 号：TN967.1[电子电信—信号与信息处理]