Ultra wideband antenna diversity characterisation for off-body communications in an indoor environment
Ultra wideband antenna diversity characterisation for off-body communications in an indoor environment
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室内环境中离体通信的超宽带天线分集表征
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
C. Parini
中科院分区：
文献类型：
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作者：
Q. Abbasi;M. Rehman;H. Chattha;K. Qaraqe;A. Alomainy;Y. Hao;C. Parini
在这项研究中，空间分集的超宽带（UWB）离体信道进行了实验研究。计算了不同室内位置的离体到体信道的分集增益（DG），讨论了分集分支天线间距变化对互耦、相关性和功率不平衡的影响。对DG的影响相对于身体上的天线和DG的行为与变化的方向之间的离体发射机和身体上的分集接收器的小变化进行了讨论。此外，主题特定的离体分集，上行链路和下行链路的多样性进行了探讨。结果表明，无论是方向或主题的变化或天线位置的微小变化不会严重影响分集性能。离体分集的比较显示相对于在体情况下的50%的改善，因此占主导地位的有用性UWB离体分集的情况下，以身体为中心的通信。
In this study, spatial diversity is experimentally investigated for ultra wideband (UWB) off-body channels. Diveristy gain (DG) is calculated for various off- to on-body channels in different indoor locations and the impact of variation of inter-spacing between diversity branch antennas on mutual coupling, correlation and power imbalance is discussed. Effect on DG with respect to small variations of antenna on the body and DG behaviour with change of orientation between off-body transmitter and on-body diversity receiver are discussed. Also subject specific off-body diversity, uplink and downlink diversity are explored in this study. Result demonstrates that neither orientation nor subject changes or small variations in antenna position will affect the diversity performance severely. Comparison of off-body diversity shows an improvement of 50% with respect to on-body case; hence dominates the usefulness of UWB off-body diversity case in body-centric communications.