Multipath Suppression Performance Analysis of GNSS Anti-Jamming Receiver

Multipath error has become one of the main error sources that restrict the high-precision application of satellite navigation system. Most of the traditional anti-multipath algorithms do not consider the multipath suppression performance under the influence of anti-interference filters in receivers and non-ideal channel characteristics, and are only suitable for multipath suppression in ideal scenarios. In this paper, the influence of non-ideal channel characteristics and anti-jamming filters on the performance of traditional multipath suppression algorithms is analyzed, and the multipath suppression performance model of GNSS anti-jamming receiver is established. The multipath suppression performance and pseudo-code tracking performance after using the anti-jamming filter is also analyzed. The simulation results show that the performance of traditional multipath suppression algorithms is degraded due to both channel characteristics and anti-jamming filter, which affects the normal reception of navigation signals.