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Benefits and Limitations of the Record and Replay Approach for GNSS Receiver Performance Assessment in Harsh Scenarios

机译:记录和重放方法在严酷情况下对GNSS接收机性能评估的好处和局限性

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摘要

Global navigation satellite systems play a significant role in the development of intelligent transport systems, where the estimation of the vehicle’s position is a key element. However, in strongly constrained environments such as city centers, the definition of quality metrics and the assessment of positioning performances are challenges to be addressed. Due to the variability of different urban scenarios, the modeling of the dynamics as well as the architecture of the positioning platform, which might embed other sensors and aiding means to the GNSS unit, make it hard to define unambiguous positioning metrics. Performance assessment through analytical models and simulators can be ineffective in terms of cost, complexity, and general validity and scalability of the results. This paper shows how a record and replay approach can be an efficient solution to grant fidelity to a realistic scenario. This work discusses advantages and disadvantages with emphasis on the case study of harsh scenarios. Such an approach requires proper data collections that allow the replay phase to test the GNSS-based positioning terminals. This paper presents the results obtained on a set of field tests related to different scenarios, selected as representative for the key performance indicators assessment.
机译:全球导航卫星系统在智能运输系统的开发中起着重要作用,在该系统中,车辆位置的估计是关键因素。但是,在城市中心等受严格限制的环境中,质量指标的定义和定位效果的评估是需要解决的挑战。由于不同城市情景的可变性,动态模型的建模以及定位平台的体系结构可能会将其他传感器和辅助手段嵌入GNSS单元,因此很难定义明确的定位指标。通过分析模型和模拟器进行的性能评估在成本,复杂性以及结果的总体有效性和可扩展性方面可能是无效的。本文说明了记录和重播方法如何成为有效保真方案的有效解决方案。这项工作讨论了优缺点,并着重于苛刻情景的案例研究。这种方法需要适当的数据收集,以允许重放阶段测试基于GNSS的定位终端。本文介绍了在一组与不同场景相关的现场测试中获得的结果,这些测试被选作代表进行关键绩效指标评估。

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