An Empirical Study on the Performance of Wireless OFDM Communications in Highly Reverberant Environments
An Empirical Study on the Performance of Wireless OFDM Communications in Highly Reverberant Environments
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DOI：
10.1109/twc.2016.2546879
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发表时间：
2016-03
影响因子：
10.4
通讯作者：
R. Measel;Christopher S. Lester;Donald J. Bucci;Kevin Wanuga;G. Tait;Richard Primerano;K. Dandekar;M. Kam
中科院分区：
文献类型：
--
作者：
R. Measel;Christopher S. Lester;Donald J. Bucci;Kevin Wanuga;G. Tait;Richard Primerano;K. Dandekar;M. Kam
混响室是封闭的反射空间，可以模拟高度混响的电磁环境。电磁环境主要由腔体的尺寸、有效传导率和通过孔的泄漏来确定。在这项工作中，我们调查的无线OFDM通信的性能与后两者通过控制混响室的加载和耦合腔的有效孔径。软件定义的无线电测量平台被用来评估通信性能，通过选择的链路级指标，包括误差矢量幅度，后处理信噪比，和吞吐量。链路质量的退化被量化为日益扩散的环境，以及利用最大比合并接收机分集方案时的改进。实验结果表明，对于较大的有效孔径，混响室和耦合腔的链路质量都得到了改善。使用耦合腔中RF传播的时间相关模型分析了这一结果。
Reverberation chambers are closed reflective spaces that can emulate highly reverberant electromagnetic environments. The electromagnetic environment is primarily determined by the size of the cavity, effective conductivity, and leakage via apertures. In this effort, we investigate the performance of wireless OFDM communications in relation to the latter two by controlling the loading of a reverberation chamber and the effective aperture into a coupled cavity. A software defined radio measurement platform was used to assess the communication performance through a selection of link-level metrics including error vector magnitude, post processing signal-to-noise ratio, and throughput. The degradation of link quality is quantified for increasingly diffuse environments, as well as the improvement when leveraging a maximal ratio combining receiver diversity scheme. The link quality was found to improve in both the reverberation chamber and the coupled cavity for larger effective apertures. This result was analyzed using a time-dependent model for RF propagation in coupled cavities.