Non-coherent multiple correlator delay structures and their tracking performance for Galileo signals

Multipath is one of the most dominant sources of errors in Global Navigation Satellite Systems (GNSS). In this paper we present two tracking structures with multiple gate delays and compare their performance with the performance of Narrow Correlator and High Resolution Correlator. The performance criteria are based on the Multipath Error Envelopes (MEEs), the Root Mean Square Errors (RMSEs) and the Mean Time to Lose Lock (MTLL) in multipath channels. It is shown here that the traditional MEE criterion can be misleading with respect to the performance in fading multipath channels. It is also shown that the proposed multiple delay gate structures have promising tracking performance in short delay multipath scenarios.