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The additional GPS compatible signals from QZSS can remarkably improve the availability, accuracy, and capability of GPS positioning.
Results indicate that A-GPS locations obtained using the 3G iPhone are much less accurate than those from regular autonomous GPS units (average median error of 8 m for ten 20-minute field tests) but appear sufficient for most Location Based Services (LBS).
To improve GPS vehicular positioning accuracy, we propose a cooperative positioning algorithm that can improve localization accuracy.
Simulation results demonstrate that the designed loop can significantly improve the tracking sensitivity and robustness for weak GPS signals without compromising the dynamic performance.
Moreover, the method also helps to increase the positioning accuracy when the GPS signal is available.
In cases of severe signal diffraction the accuracy of the GPS positions is improved by more than 50% compared to standard GPS processing techniques.
The signal passing through your body right now from a local television or radio station is almost certainly several thousand times stronger than a GPS signal.
We propose in this paper a method to enhance the performance of a coupled global positioning/inertial navigation system (GPS/INS) for land navigation applications during GPS signal loss.
Use of an integrated GPS/inertial system can be effective in mitigating the effects of GPS signal interference such as intentional jamming.