Multi-frequency signals have been accessible for most Global Navigation Satellite Systems . Existing studies have verified that using multi-frequency extra-wide-lane and wide-lane observations can realize decimeter, sub-decimeter and even centimeter rapid positioning. In this paper, a tightly combined wide-lane real-time kinematic positioning method using triple-frequency GPS and BDS is proposed. The differential inter-system bias is taken into consideration so that an inter-system differencing model is formed. Due to the influence of different frequencies between GPS and BDS, the double-difference wide-lane ambiguity between GPS and BDS reference satellites and the single-difference ambiguity of the BDS reference satellite are estimated jointly with the wide-lane differential inter-system bias. Thus, a full-rank model can be obtained without any external calibration. Using the stability of wide-lane differential inter-system bias in the estimation from epoch to epoch, redundant observations can be introduced, therefore the strength of the positioning model can be enhanced. Positioning performance under simulated obstructed environments is evaluated. The results show that the inter-system model can effectively improve the positioning compared with the conventional intra-system model for the severely obstructed situations.

大多数全球导航卫星系统都可以获取多频信号。现有研究已经证实，使用多频超宽车道和宽车道观测可以实现分米，亚分米甚至厘米的快速定位。提出了一种结合三频GPS和BDS的紧密结合的宽车道实时运动定位方法。考虑到系统间的差异偏差，从而形成系统间差异模型。由于GPS和BDS之间的不同频率的影响，结合广域差分系统间偏差，共同估算了GPS和BDS参考卫星之间的双差广域歧义和BDS参考卫星的单差歧义。 。因此，无需任何外部校准即可获得完整等级的模型。利用广域微分系统间偏差的稳定性在每个时期之间的估计中，可以引入冗余观测，因此可以增强定位模型的强度。评估在模拟障碍环境下的定位性能。结果表明，与传统的系统内模型相比，在严重阻塞的情况下，系统间模型可以有效地改善定位。