Performance Analysis of Passive UHF RFID Systems Under Cascaded Fading Channels and Interference Effects
Performance Analysis of Passive UHF RFID Systems Under Cascaded Fading Channels and Interference Effects
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DOI：
10.1109/twc.2014.2366142
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发表时间：
2015-03-01
影响因子：
10.4
通讯作者：
Penty, Richard V.
中科院分区：
文献类型：
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作者：
Bekkali, Abdelmoula;Zou, Sicheng;Penty, Richard V.
研究了单站和双站无源超高频射频识别(UHF RFID)系统在级联衰落信道和干扰影响下的性能。所使用的性能度量是标签检测概率，其定义为瞬时接收功率高于读取器灵敏度的概率。利用级联的前向和后向散射衰落信道以及阅读器天线相对于标签的方向，推导出检测概率的闭合表达式。在此基础上，分析了无源超高频射频识别系统在阅读器到标签干扰下的性能，并分析了建设性干扰和破坏性干扰对系统性能的影响。此外，还给出了理想、多径衰落和干扰环境下的最大读数范围。据我们所知，这是第一次对无源超高频射频识别系统在级联衰落信道下的三维性能进行分析。所得结果对从射频物理信道角度设计和优化无源超高频射频识别系统具有重要的参考价值。
In this paper, the performance of monostatic and bistatic passive ultra high frequency radio frequency identification (UHF RFID) systems under the effects of cascaded fading channels and interference is studied. The performance metric used is tag detection probability defined as the probability that the instantaneous received power is higher than the reader's sensitivity. A closed-form expression of the detection probability is derived using cascaded forward and backscatter fading channels and the reader antennas orientation relative to the tag. Furthermore, the performance of passive UHF RFID systems under reader-to-tag interference caused by both the desired RFID signal and multiple RFID interferers is analyzed, and the effect of constructive and destructive interferences is examined. In addition, the maximum reading range in ideal, multipath fading, and interfering environments is presented. To the best of our knowledge, this is the first work that provides a 3-D performance analysis of the passive UHF RFID systems under cascaded fading channels. The obtained results are very useful for the design and optimization of passive UHF RFID systems from an RF physical channel point of view.