Using Future GNSS Multi-tone Signals for Increased Success in Carrier Phase Integer Ambiguity Fixing

摘要

In this paper the potential benefits of an additional signal component in the Galileo E1 band are investigated for the use of carrier phase ambiguity resolution being the key to fast and high-precision positioning. High accuracy within short time is achievable by incorporation of carrier phase ambiguities and constraining them to integer values. Thus, the improvement of the integer ambiguity resolution is the main goal of this research. Figure of merit for the analysis is the probability of correct integer ambiguity resolution, the so called success rate. Several signal options for E1 are explored including multi-carrier signals and meta signal processing. We consideri E1 only processing and E1+E5a processing. The analysis considers a full constellation and computes the success rate averaged over the whole Earth's surface for various C/NO values. Multipath is not considered in this work but a range of values for the differential ionospheric delay. We find that one additional component provides a significant increase in the success rate (for E1 and E1+E5a processing). The gain is higher, if the frequency separation to the central frequency of E1 gets higher. Further signal components in the same E1 frequency range do not provide any further gain under the constraint of equal total power.