一种有效的单频GPS相位模糊度解算方法

An efficient technique to facilitate GPS single frequency phase ambiguity resolution

针对快速定位中GPS单频相位模糊度较难归整的问题,采用理论分析和实验验证的方法,推导了实时动态下相位平滑伪距的递推公式,给出了一些提高观测方程线性化初始值精度的思路。在分析了短时间段双差方程结构特性的基础上,提出采用迭代选权拟合法提高相位模糊度实数解精度的新方法。算例表明,该方法提高了模糊度实数解的精度和可靠性,缩小了模糊度的搜索空间,促进了模糊度解算效率和成功率,从而能促进单频GPS接收机在高精度快速定位中的应用。

Aiming at the difficult problem of fixing the integer cycle ambiguities for GPS single frequency phase, the paper with the methods of the theory analyzing and experiments validating, deduces the recurrence formula for carrier phase smoothing pseudo-range in the real-time kinematic mode, proposes some approaches to increase the accuracy of the initial values used by the observation equation linearization, Based on the analyses of the structure characteristics of the double difference equation, a new approach that uses the iterative fitting method by selection of the parameter weights to improve the precision and the reliability of the computed float ambiguities is suggested, which reduces the search space for integer ambiguities, raises the efficiency and the success rate in the course of fixing integer ambiguities and promotes the applications of single frequency GPS receiver in the high precision fast positioning.