一种确定整周模糊度搜索空间的方法  

A Method for Determining Ambiguity Search Space

作　　者：宋福成[1] 杨汀[1] 陈宜金[1] 师晓波 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《数学的实践与认识》2016年第3期188-194,共7页Mathematics in Practice and Theory

基　　金：中央高校基本科研业务费项目(2010YD06)

摘　　要：模糊度搜索空间的大小是影响模糊度解算效率的关键因素之一.针对传统确定模糊度搜索空间的方法较为保守,致使搜索空间过大,提出了一种基于最小二乘模糊度降相关平差法(LAMBDA)的改进方法.首先对目前模糊度搜索空间确定方法给予了介绍和深入的分析比较,评价了这些经典方法的优缺点.在此基础上,定义了搜索空间的一个影响因子η,并结合LAMBDA方提出了确定模糊度搜索空间的修正公式.基于仿真和实测数据对修正方法进行实验,结果表明方法在保证获得期望模糊度组数的前提下,其确定的模糊度搜索空间包含的整数点个数更小,可保证90%以上实际模糊度组数接近于期望值.The size of the ambiguity search space plays a critical role in ambiguity resolution.In view of conservatives in traditional methods for determining ambiguity search space,a method was presented based on least-square ambiguity decorrelation adjustment method.Firstly,the classic methods of determination of the ambiguity search space were given a detailed introduction and in-depth analysis and comparison,and their merits and demerits were evaluated.On this basis,an impact factor？ is defined,and a modified formula is presented based on LAMBDA method.Experiments using modified formula based on the simulated and measured data,show that the modified method can guarantee at least the requested candidates but get fewer integer point number inside the ambiguity search space.And more than 90% of actual number of integer candidates is close to expectation.

关 键 词：全球定位系统 模糊度解算 最小二乘降相关法 模糊度搜索空间 

分 类 号：P228.4[天文地球—大地测量学与测量工程]