Capture-Aware Estimation for the Number of RFID Tags with Lower Complexity

Capture-Aware Estimation for the Number of RFID Tags with Lower Complexity
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复杂度较低的 RFID 标签数量的捕获感知估计

DOI:
10.1109/lcomm.2013.082413.130765
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发表时间:
2013-08
期刊:
IEEE Communications Letters
影响因子:
--
通讯作者:
Fei Gao
Fei Gao
中科院分区:
其他
文献类型:
--
作者:
Xi Yang;Haifeng Wu(吴海锋);Yu Zeng(曾玉);Fei Gao

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捕获效应在无线通信系统中非常普遍。在无源射频识别(RFID)系统中,即使多个标签同时将它们的信号反向散射到阅读器,由于捕获效应,其中一个标签将被成功识别。在这封信中,我们提出了一个算法,将优化动态帧长ALOHA RFID协议的捕获效应下的识别效率。该算法估计标签的数量和捕获效果的概率。根据这些参数,可以获得最佳帧长度。该算法的优点是它不需要许多步骤来搜索一个极值的估计。从而降低了计算复杂度。计算机仿真结果表明,该方法的识别效率与现有算法几乎相同,但计算复杂度较低。
Capture effect is very common in wireless communication systems. In a passive radio frequency identification (RFID) system, even though multiple tags backscatter their signals to a reader simultaneously, one of the tags will be successfully identified due to the capture effect. In this letter, we propose an algorithm which will optimize the identification efficiency of a dynamic frame length ALOHA RFID protocol under capture effect. The proposed algorithm estimates the number of tags and the probability of capture effect. From these parameters, an optimal frame length can be obtained. The advantage of the algorithm is that it does not need many steps to search an extreme value for the estimation. It thus reduces the computational complexity. Computer simulation results show that the proposed method's identification efficiency is almost identical to existing algorithms, but at lower computational complexity.
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