This article presents a generalized multifrequency carrier tracking architecture applicable to multifrequency global navigation satellite system receivers operating in frequency-selective fading environments. This architecture unifies a conventional single-frequency-independent tracking (ST) mode, which only operates on measurements from a single carrier, a multifrequency joint tracking (JT) mode, which linearly combines measurements from multiple carriers, and a multifrequency optimal tracking (OT) mode, which incorporates signal intensity in multicarrier combinations via an aggregate Kalman filter. The analytical closed-form expressions of the tracking error variance for the ST, JT, and OT modes are derived for theoretical analysis and comparison. Their tracking performances are evaluated and quantified using a simulated triple-frequency GPS signal with varying combinations of signal strengths. To have a fair assessment in real-world scenarios, real data collected during strong ionospheric, tropospheric scintillations, and multipath reflections and scattering are also used for performance evaluations in ST, JT, and OT modes.
Generalized Multifrequency GPS Carrier Tracking Architecture: Design and Performance Analysis
IEEE Transactions on Aerospace and Electronic Systems ; 56 , 4 ; 2548-2563
01.08.2020
3432487 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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