GNSS MULTIPATH MITIGATION USING SLOPE-BASED CODE DISCRIMINATOR

摘要

A GNSS receiver for generating distance estimates from multiple GNSS satellites. The GNSS receiver includes an antenna and an RF front end coupled to the antenna configured to generate a plurality of samples related to a received signal. The GNSS receiver includes a correlator coupled to the RF front end configured to perform various operations including performing three correlations on the plurality of samples with three local code to generate three correlation results, where the three local codes are shifted in time or distance with respect to each other. The GNSS receiver includes a processor for defining a first slope using the first correlation result and the second correlation result, defining a second slope using the second correlation result and the third correlation result, and defining a code discriminator as a sum of the first slope and the second slope.