Measurement-Based Analysis of Delay-Doppler Characteristics in an Indoor Environment
Measurement-Based Analysis of Delay-Doppler Characteristics in an Indoor Environment
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室内环境中基于测量的延迟多普勒特性分析
DOI：
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发表时间：
2016
影响因子：
5.7
通讯作者：
W. Joseph
中科院分区：
文献类型：
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作者：
Brecht Hanssens;E. Tanghe;L. Martens;Claude Oestges;W. Joseph
针对室内环境中的短距离通信，对存在移动人员情况下的延迟 - 多普勒特性进行了分析。在一所大学拥挤的大厅里，在课间的几次短休息和长休息期间，于3.6 GHz进行了信道探测测量。连续三天，发射和接收天线在不同位置重复进行测量。在这项研究中，分析了最大多普勒频移和多普勒扩展在时延域中的行为，其作为大厅人员占用情况、2×2多输入多输出（MIMO）天线的极化以及它们在大厅中位置的函数。测量结果显示，活动中短休息和长休息的多普勒扩展之间存在明显差异，这表明它们的多普勒频谱具有独特的功率分布。此外，共极化和交叉极化的多普勒特性之间存在显著对比。在多个位置进行的测量揭示了表征多径的重要性，并表明多普勒效应取决于天线在环境中的位置。此外，这项工作还表明，多普勒频谱可以用柯西分布精确建模，从而能够生成描述多普勒特性的参数。
An analysis of delay-Doppler characteristics in the presence of moving people is presented for short-range communication in an indoor environment. Channel-sounding measurements have been carried out at 3.6 GHz in a crowded university hall during several short and long breaks in-between courses. During three consecutive days, the measurements were repeated with different positions for the transmit and receive antennas. In this study, the behavior of the maximum Doppler shift and the Doppler spread was analyzed in the time-delay domain as a function of the occupation of the hall, the polarizations of the 2 × 2 MIMO antennas, and their positions in the hall. The measurements reveal a clear distinction between the Doppler spread of the short and long breaks in the campaign, indicating a distinctive power distribution of their Doppler spectra. In addition, there is a significant contrast between the Doppler characteristics of the co- and cross-polarizations. Measurements at several positions reveal the importance of characterizing multipaths and show that the Doppler effect depends on the position of the antennas in the environment. In addition, this work also shows that the Doppler spectrum can be accurately modeled by a Cauchy distribution, allowing for the generation of parameters to describe Doppler characteristics.