ARTEMISA: NEW GNSS RECEIVER PROCESSING TECHNIQUES FOR POSITIONING AND MULTIPATH MITIGATION

Advances in computation and signal processing technologies allow the implementation sophisticated non-linear synchronization techniques that can be integrated in the acquisition and tracking modules, estimating both Line Of Sight Signal (LOSS) and multipath (MP) echoes. Instead of using an ordinary DLL/PLL, advanced DLLs as the Multipath Estimating Delay Lock Loop (MEDLL), based on maximum likelihood approach can be used for better estimation and mitigation of the multipath. In addition to this, a new architecture of the GNSS control loop can be proposed, in which tracking and positioning are performed in single step, achieving/keeping the synchronization of the loop using the navigation solution. This paper focuses on the MEDLL and the Multipath Estimating Particle Filter (MEPF), showing preliminary results of these techniques in controlled multipath scenarios.