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Code tracking architecture influence on GPS carrier multipath

机译:代码跟踪架构对GPS载波多径的影响

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It is well known that carrier-phase multipath is one of the limiting error sources in high-precision differential GPS (Global Positioning System) applications. A thorough understanding of carrier-phase multipath is the first step in the course of mitigating its impact in high precision applications. Complete characterization of carrier-phase multipath error requires a fundamental theoretical description and mathematical modeling. However, the theory and models must be validated with real data. This paper documents the results of a study of the influence of GPS receiver code tracking architecture (coherent and noncoherent) on the carrier-phase multipath error, and provides a thorough validation of carrier-phase multipath theory. Validation is carried out for wide and narrow correlator spacing within coherent and noncoherent code tracking architectures by comparing bench test data to theoretical predictions. Prior to this effort, scant attention had been given to validating carrier-phase multipath theory against GPS data (Townsend et al., 1995). In addition, data collected for non-zero multipath phase rates is presented. The impact of GPS receiver architecture on the mitigation of phase-rate multipath was discussed.
机译:众所周知,在高精度差分GPS(全球定位系统)应用中,载波相位多径是限制误差源之一。充分了解载波相位多径是减轻其在高精度应用中的影响的第一步。载波相位多径误差的完整表征需要基本的理论描述和数学建模。但是,理论和模型必须使用真实数据进行验证。本文记录了GPS接收机代码跟踪架构(相干和非相干)对载波相位多径误差影响的研究结果,并提供了对载波相位多径理论的全面验证。通过将基准测试数据与理论预测值进行比较,可以对相干和非相干代码跟踪体系结构中相关器之间的宽和窄间距进行验证。在此之前,很少有人关注针对GPS数据验证载波相位多径理论(Townsend等,1995)。此外,还介绍了针对非零多径相位速率收集的数据。讨论了GPS接收器架构对减轻相位速率多径的影响。

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