一种基于位置域的北斗快速整周模糊度确定方法

A Rapid Integer Ambiguity Resolution Method Based on Position Domain of BeiDou

整周模糊度搜索方法是卫星导航高精度应用技术研究的关键,通常可分为测量域、位置域和模糊度域。其中位置域整周模糊度求解方法因为其计算量大而很少应用于实际,也成为该方向难以突破的瓶颈。首先针对北斗系统特殊星座构型进行了深入研究;然后利用GEO卫星东西向几何构型好的特点,提出一种三维转换为二维位置域模糊度搜索算法。该方法在保证定位精度的同时,能够极大地减少计算量。最后,利用短基线的北斗实际数据进行验证,仿真结果表明了该方法的高效性。

As the key of high-precision satellite navigation application technology, integer ambiguity resolution methods can divide into three domains： measurement domain, position domain and ambiguity domain, among which position domain methods are rarely used in actual because of the large computation, and has become the bot-tleneck problem in this field. In this paper, on the basis of deep analysis of the specific satellite constellation of BeiDou system, a new position domain method was proposed which transferred the searching algorithm in 3 dimen-sions into 2 dimensions, utilizing the advantage of good geometry configuration in east-west direction of GEO satel-lites. The computation was greatly reduced by using this method, while the high accuracy was ensured. Actual re-ceiver data was used to verify the proposed method, and the results showed the method was efficient.