Dual-frequency GNSS/Wi-Fi Smartphone Navigation

Abstract

More and more sensors and receivers are found nowadays in modern smartphones which can enable and improve positioning for Location- based Services and other navigation applications. They include multiconstellation GNSS (Global Navigation Satellite Systems) receivers and other sensors which can be employed for positioning. The state-of-the-art thereby is that dual frequency GNSS capable receivers in smartphones are now recently on the market. With these receivers not only the current 3D positions but also the raw data of the measurements can be utilized leading to higher positioning accuracies. New algorithms need to be developed to make use of the measured GNSS raw data to be able to achieve required positioning accuracies. Therefore, the goal of our research concept is to develop a methodology based on dual frequency GNSS/Wi-Fi smartphone (L1/L5 carrier phases and 2.4/5 GHz frequency bands) for supporting seamless out/indoor navigation. A methodology for processing the measurement results based on fusion of these techniques, its significance and the expected findings are presented in the paper.