重庆邮电大学学报（自然科学版）2017，Vol.29Issue(2)：196-201,6.DOI:10.3979/j.issn.1673-825X.2017.02.009
非线性基线长度约束在北斗测姿中的应用
Application of nonlinear baseline length constraint in BD attitude determination
摘要
Abstract
For the low success rate problem of ambiguity resolution in traditional unconstrained attitude determination,the paper presents a novel fast ambiguity determination method based on integer least squares problem and its application in BD attitude determination.Taking baseline length as the prior information,it extends current unconstrained ILS theory to the nonlinearly constrained case.then approaches its sub-multiple by adopting the orthogonal mapping method.Meanwhile,during the search processing,according to the characteristic of the search space,the upper and lower bound of it was determined,as well as the ambiguity residual is limited.As a result the number of these candidates could be decreased.Finally,by increasing the search space in an iterative way together with the constrained least square,the optimum ambiguity could be obtained.Experimental results with a single frequency BD receiver reveal the effectiveness of the proposed algorithm.In single epoch case,the results show that the method could reduce the computational load,and the success rate has been improved about 30%.关键词
北斗/姿态测量/整周模糊度/整数最小二乘/非线性约束Key words
BD/attitude determination/integer ambiguity/integer least square/nonlinear constraint分类
天文与地球科学引用本文复制引用
田增山,李小飞..非线性基线长度约束在北斗测姿中的应用[J].重庆邮电大学学报（自然科学版）,2017,29(2):196-201,6.基金项目
重庆市自然科学基金(cstc2013jcyjA40032) （cstc2013jcyjA40032）
The Natural Science Foundation Project of Chongqing CSTC(cstc2013jcyjA40032) （cstc2013jcyjA40032）
