FDI Algorithms for GPS Signals: A Different Perspective of a Known Problem

Abstract

Autonomous fault detection and isolation capability is an essential figure for GPS based sole means of Navigation systems. Integrity is as important as accuracy for aeronautical applications. Thus the defmition of a new perspective for the analysis of GPS satellite malfunctions, and the synthesis of RAIM algorithms is discussed. New features and parameters for failure detection and isolations are introduced. The new approach is based upon the joint exploitation of all the possible LS solutions applicable to a given linear estimation problem, e.g. GPS estimation, and the analysIs IS performed m the position domain. Preliminary results show accordance with the predicted outcome and the effectiveness of the proposed implementation.