With the proliferation of global navigation satellite system (GNSS) enabled devices it has become more common for people to use not only for car navigation but as well for personal navigation inside urban canyons. These environments are more difficult for GNSS devices as the stronger multipath and reduced sky visibility place a toll on the system’s performance. The geometry of the constellation can have a negative impact on the solution, especially if the satellites seen and locked are all concentrated in a region of the sky, something quite prone to happen under these kind of environments. Losing a satellite can result in a significant increase of the dilution of precision (DOP), which quantifies the geometry impact on the solution. This change in the DOP can lead to several metres of error in the reported position. Therefore, if predicted measurements can be provided in order to mitigate this effect, the reported solution is improved. For techniques that rely on carrier phase measurement information another concern is the presence of cycle slips due to the higher noise level in the observations. This effect has negative impacts on the system’s performance and it must be detected and, if possible, corrected. This paper aims to provide a mechanism that relies on predicted Doppler measurements in order to perform data regeneration under rough conditions as well as cycle slip detection and correction.
6th Mosharaka International Conference on Communications, Propagation, and Electronics (MIC-CPE 2013)
Congress
2013 Global Congress on Communications, Propagation, and Electronics (GC-CPE 2013), 1-3 February 2013, Kenitra, Morocco
Pages
11-16
Topics
Earth-Space Communications Wave Propagation
ISSN
2227-331X
DOI
BibTeX
@inproceedings{522CPE2013,
title={Using Predicted Doppler Measurements for Positioning in Urban Environments},
author={Pedro M. Figueiredo E Silva, and José Sanguino, and Teresa Ferreira, and Antonio Rodrigues},
booktitle={2013 Global Congress on Communications, Propagation, and Electronics (GC-CPE 2013)},
year={2013},
pages={11-16},
doi={}},
organization={Mosharaka for Research and Studies}
}
