多普勒观测值平滑伪距单点定位精度分析 Accuracy Analysis of Single Point Positioning Using Doppler Smoothed Pseudorange Observations

GPS伪距观测值测量噪声大，易受多路径等误差影响，而多普勒观测值具有较好的观测精度且不受多路径误差的干扰。本文采用多普勒平滑伪距观测值进行单点定位解算。在有多路径误差和无多路径误差下分别进行实验，结果表明多普勒平滑伪距能有效改善单点定位的精度，在多路径环境下，东，北，高三个方向上的改善率分别为26%、30 % 和6%。 The C/A code observations have large noise and are easily contaminated by multipath errors. By contrast, the Doppler values have good accuracy and are not disturbed by multipath. The Doppler smoothed pseudorange (DSPR) is used to improve the accuracy of pseudorange. Experiments were carried out in the multipath and multipath–free environments. Results show that the DSPR can improve the positioning accuracy. Especially in the multipath environment, the DSPR can improve the accuracy by 26%, 30% and 6% in east, north and up directions, respectively.