System and method for providing code modification for multipath improvement in GNSS receivers

Abstract

Systems, methods and apparatuses for multipath mitigation in global navigation satellite system (GNSS) receivers are described. One method includes modifying the locally generated code in the GNSS receiver bit by bit in order to reduce offset peaks in the autocorrelation when receiving the satellite generated code signal. Such modified local codes may be pre-computed and stored or otherwise provided during reception. Moreover, the GNSS receiver may select whether or not to use the modified local code or the standard local code based on a selection criteria. Furthermore, multiple modified version of the same local code may be generated and/or stored in order to provide differing performance levels.

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