New protocols related to Internet-of-things applications may introduce previously unnoticed measurement effects in reverberation chambers (RCs) due to the narrowband nature of these protocols. Such technologies also require less loading to meet the coherence-bandwidth conditions, which may lead to higher variations, hence uncertainties, across the channel. In this work, we extend a previous study of uncertainty in NB-IoT and CAT-M1 device measurements in RCs by providing, for the first time, a comprehensive uncertainty analysis of the components related to the reference and DUT measurements. By use of a significance test, we show that certain components of uncertainty become more dominant for such narrowband protocols, and cannot be considered as negligible, as in current standardized test methods. We show that the uncertainty, if not accounted for by using the extended formulation, will be greatly overestimated and could lead to non-compliance to standards.

中文翻译：

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混响室中的 NB-IoT 设备：综合不确定性分析

由于这些协议的窄带特性，与物联网应用相关的新协议可能会在混响室 (RC) 中引入以前未被注意到的测量效果。此类技术还需要较少的负载来满足相干带宽条件，这可能会导致整个通道的变化更大，从而导致不确定性。在这项工作中，我们通过首次提供与参考和 DUT 测量相关的组件的全面不确定性分析，扩展了先前对 RC 中 NB-IoT 和 CAT-M1 设备测量不确定性的研究。通过使用显着性检验，我们表明，对于此类窄带协议，某些不确定性成分变得更加重要，并且不能被视为可以忽略不计，就像在当前的标准化测试方法中一样。我们证明了不确定性，