一种适合单频GPS动态求解整周模糊度的方法

对于高精度测量和导航，GPS载波相位整周模糊度的快速求解仍然是一个难点，尤其对于单频接收机。本文提出一种动态快速求解整周模糊度的方法，其基本思想先对系数阵进行QR分解，然后通过矩阵变换使模糊度参数和位置参数分离，从而降低矩阵的维数，满足实时动态求解的要求，最后应用LAMBDA方法搜索模糊度。为验证该算法，我们用单频GPS接收机进行了两种实验(静态和动态)，利用本文方法解算，静态误差小于1．5cm，动态误差小于4cm。实验结果表明：对于动态用户，该方法是快速和有效的。该方法可应用于高精度的导航和定位。

An Algorithm for Dynamic Solving Integer Ambiguity of a Single Frequency GPS Receiver

GPS carrier phase integer ambiguity fast r esolution is still the key issue and challenge for high accuracy survey and navi gation, especially for single frequency receiver. The algorithm of fast ambiguit y resolution on-the-fly is presented in this paper. Firstly, a method of QR de composition is applied to decompose the observation matrix of satellites, then d ecrease the dimensions of the matrix to satisfy rapid ambiguity resolution by ma trix transformation that separated the ambiguity parameters from the position pa rameters. Finally, the LAMBDA method is used to search the fixed ambiguity. The algorithm is applied to two different types of real data to show its effectivene ss. Experimental results show that the proposed method is fast and efficient for relative positioning of a moving user. The method may be used in areas requirin g accurate positioning such as navigation and geodesy.