Development of a Custom GNSS Software Receiver Supporting Supercorrelation

Abstract

Mitigating multipath interference is one of the biggest challenges in radio positioning. The Supercorrelation™ technology developed via Focal Point Positioning (FPP) suppresses multipath interference by performing long coherent integration while undergoing complex motion in order to isolate the Line-Of-Sight (LOS) signals from the unwanted multipath interference. This article presents the current status of a Supercorrelating Global Navigation Satellite System (GNSS) Software-Defined Radio (SDR) and a systematic testing framework. The SDR receiver is capable of real-time processing and facilitates independent testing and demonstrations. The testing framework uses synthetic signals with a Spirent Radio-Frequency Constellation Simulator (RFCS) with Sim3D to create controlled and repeatable scenarios. The initial results demonstrate the benefits of Supercorrelator Technology (S-GNSS) for navigation resilience.

Keywords

• Supercorrelation
• GNSS
• multipath mitigation
• Non-Line-Of-Sight (NLOS) suppression
• SDR