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- 2018
基于多普勒测速的GPS单历元动态定位算法
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Abstract:
在传统的GPS单历元动态定位参数估计中，由于先验约束信息较少，模糊度求解和定位性能往往较低。据此，研究了多普勒测速在GPS单历元动态定位中的应用，提出了一种附有GPS多普勒测速信息约束的坐标更新方法，即利用移动载体先验坐标和多普勒测速信息预测当前历元坐标。考虑到该方法进行坐标更新的精度较高和传统单点定位坐标更新的稳健性较强等特点，在此基础上给出了相应的单历元整周模糊度参数求解策略，进一步提高了该方法的定位性能。试验结果表明，所提出的算法相对于传统的无速度信息坐标约束的GPS单历元动态定位算法，其模糊度浮点解精度、模糊度固定率和平均定位精度均有了进一步提高，尤其是在观测卫星数较少、卫星几何结构较差的情况下更为明显
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