TY - CONF T1 - Algorithms for GNSS Positioning in Difficult Scenario T2 - ENC 2011 Y1 - 2011 A1 - ANGRISANO, A A1 - GAGLIONE, S A1 - GIOIA, C A1 - ROBUSTELLI, U A1 - VULTAGGIO, M AB -
Satellite navigation is critical in signal-degraded environments such as urban 
canyons and mountainous area, where many GNSS signals are blocked by natural 
and artificial obstacles or are strongly degraded. Hence standalone GPS is often 
unable to guarantee a continuous and accurate positioning. A suitable approach 
could be the integration of several GNSS. Multi-constellation system guarantees an 
improved satellite availability with respect to GPS standalone, providing a 
positioning enhancement in terms of accuracy, continuity and integrity. Currently 
the ideal candidate for supplement GPS in a multi-constellation approach is the 
Russian GLONASS. The main purposes of this work are the performance 
assessment of a GNSS multi-constellation relative to GPS stand-alone and the 
comparison of Least Squares and Kalman Filter. 
JF - ENC 2011 CY - London ER -