The Receiver Autonomous Integrity Monitoring

(RAIM) is used to improve positioning system safety. This paper

proposes a new RAIM approach to detect and exclude multifaults of GNSS measurements before position estimation. The

new approach uses the information filter for position estimation

and information test to faults diagnosis. This test is based on

exponential convergence of the information filter measured using

the mutual information. Results with real data of GNSS

measurements (C/A code and L1 phase) show the benefits of the

proposed approach in improving the GNSS receiver integrity

positioning.