Single- and multi-correlator sequential tests for signal integrity in multi-antenna GNSS receivers

Multipath mitigation has attracted the attention of many researchers, thus leading to outstanding contributions in the past years. In contrast, multipath detection has not benefited that much. It has remained in background, with most of the current state of the art still relying on classical detection techniques. In this paper, we take a leap forward in multipath detection, and we propose a CUSUM-based sequential change detection algorithm. The aim is to focus on quickest detection techniques in order to detect the presence of multipath and to provide integrity to GNSS receivers. We will focus herein on multi-antenna GNSS receivers, with both single and multi correlator architectures, and numerical results will be used to validate the proposed technique.