INS-Assisted GNSS Signal Tracking Modeling and Assessment

Abstract:

To improve the tracking performance of GNSS receiver in signal-attenuated environments, phase lock loop (PLL) and delay lock loop (DLL) assisted with Inertial Navigation System (INS) measurements are considered. Combining inertial navigation principles with signal processing, this paper proposes a simplified but efficient mathematical model of INS-assisted second-order tracking loops. Compared with unaided GNSS receiver, the tracking behavior of INS-assisted receiver is quantitatively analyzed, and the kind of INS suitable to guarantee the tracking condition is determined. The results indicate that an INS with 1 deg/h gyro drift is necessary to support PLL, and MEMS inertial sensor with 100 deg/h gyro drift is sufficient to aid DLL to keep favored tracking ability.

• Periodical: Advanced Materials Research (Volumes 271-273)
• Pages: 603-608
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.271-273.603
• Online since: July 2011
• Authors: Ping Ye, Xing Qun Zhan, Gang Du
• Keywords: Global Navigation Satellite System (GNSS), INS Assisted, Modeling, Tracking

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