Simulation Models for GNSS Receiver RF Multipath and Interference Estimation with Dual-Polarization Antenna (DPA) TITLE: RF Multipath Estimation in GPS signals using Dual Polarised Antenna(DPA) The GPS signals travelling through the space come across various phenomena before reaching the receiver. Multipath, one of these effects, indicate the situation when the GPS signals propagating towards the receiver undergo reflection on the ground or surrounding objects and reach the receiver not only through one path but also these secondary components. This causes the receiver to receive the Line Of Sight (LOS) signal along with the reflected version of the signal which arrives with a certain amount of delay.