A novel method on quality analysis of satellite navigation signal and efficient initial positioning

In this paper, with the purpose of improving the initial positioning efficiency in the receiver, we first analyze the received signal from navigation satellites. Then, an initial section of the navigation data will be preprocessed to determine the analysis of the quality of the received signal, and appropriate strategies will be formulated to handle the next navigation data. The frames that are not involved in the initial positioning will be dropped, therefore, the navigation data that will be processed has been reduced significantly. Finally, the initial positioning efficiency will be improved to reduce TTFF (Time To First Fix). Because our method is starting from the original data sources in the tracking loop to reduce the amount of data and computing, it could greatly reduce the TTFF. Experiments show that the average processing time was reduced by 30.16%, and the maximum memory cost was cut by 31.20%. The empirical results demonstrate the expectation clearly, and this algorithm has improved initial positioning efficiency and reduced tracking operations significantly.