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Generalized Multifrequency GPS Carrier Tracking Architecture: Design and Performance Analysis

机译:广义多频GPS载波跟踪架构:设计和性能分析

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摘要

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.
机译:本文介绍了适用于在频率选择性衰落环境中运行的多频性全局导航卫星系统接收器的通用多频性载体跟踪架构。该架构统一了传统的单频独立的跟踪(ST)模式,其仅在从单个载波的测量上操作,多频关系接头跟踪(JT)模式,其线性地组合来自多个载波的测量值,以及多频率最佳跟踪(OT )模式,它通过聚合卡尔曼滤波器结合了多载波组合中的信号强度。为理论分析和比较导出了ST,JT和OT模式的跟踪误差方差的分析闭合表达式。使用具有不同信号强度的组合的模拟三频GPS信号来评估和量化它们的跟踪性能。为了在现实世界方案中进行公平评估,在强电离层,对流层闪烁和多路径反射和散射期间收集的实际数据也用于ST,JT和OT模式的性能评估。

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