一种改进的整周模糊度去相关算法  

An Improved Integer Ambiguity Decorrelation Algorithm

作　　者：蒋涅 裴炳南 张豪生 JIANG Nie;PEI Bingnan;ZHANG Haosheng(Dalian University,Liaoning Engineering Laboratory of BeiDou High-precision Location Service,Dalian 116622 China;Dalian University,Dalian Key Laboratory of Environmental Perception and Intelligent Control,Dalian 116622 China;Institute of Telecommunications and Navigation Quanzhou University of Information Engineering,Quanzhou 362000 China)

机构地区：[1]大连大学辽宁省北斗高精度位置服务技术工程实验室,辽宁大连116622 [2]大连大学大连市环境感知与智能控制重点实验室,辽宁大连116622 [3]泉州信息工程学院通信与导航技术研究所,福建泉州362000

出　　处：《电光与控制》2020年第1期37-41,共5页Electronics Optics & Control

基　　金：国家自然科学基金(61271379)

摘　　要：全球卫星导航系统整周模糊度去相关算法的性能直接影响到整周模糊度的解算精度和效率。针对整周模糊度去相关算法的性能问题,提出了对协方差矩阵的对角线元素先实施升序排列,后对变换矩阵的对角线元素进行降序排列的方法,进而改进了现有算法的终止条件,提高了去相关解算效果和模糊度搜索效率。数值仿真实验表明,与文献中基于对角线升序排列的去相关算法和迭代算法比较,所提改进算法的去相关性能在高维空间具有明显优势,适用于多星导航系统的整周模糊度求解。The performance of the integer-ambiguity decorrelation algorithm in the Global Navigation Satellite System(GNSS)directly affects the accuracy and the efficiency of the solution of integer ambiguity.In order to improve the efficiency of the integer-ambiguity decorrelation algorithm a method was proposed to organize the diagonal elements of the ambiguity covariance matrix in ascending order at first then reorganize the diagonal elements of the transformation matrix in descending one thus to improve the termination conditions of the existing algorithm and improve the effect of decorrelation solution and the ambiguity search efficiency.The numerical simulation results show that compared with the decorrelation algorithm based on diagonal ascending order and the iterative algorithm the algorithm proposed here has obvious advantages on decorrelation performance in high-dimensional data space which is suitable for the integer ambiguity solution of multi-satellite navigation system.

关 键 词：卫星导航 整数变换 整周模糊度 去相关算法 

分 类 号：P228[天文地球—大地测量学与测量工程]