Method for interference suppression on new signals in global navigation satellite system

Abstract

The accuracy of code tracking plays an important role in signal processing of Global Navigation Satellite System (GNSS) receivers. In this paper, a novel method of code tracking is proposed. It is based on using seven correlators as multiple gate delay structure. This method could be applied to new navigation signals which adopt a new type of modulation called binary offset carrier (BOC). Some variants of BOC have been developed for new navigation signals. These new types of modulation provide some advantage in signal synchronization. However, there are some challenges since there are some side peaks in auto correlation function of signals. These side peaks could raise a
risk of wrong peak selection called ambiguity problem. The proposed method in this paper also removes the ambiguity in code tracking. The simulation results show the good performance of this method in code tracking as well as multipath mitigation.

Keywords: GNSS; multipath reduction technique; side peak suppression technique; ambiguity tracking technique.