Improved physical layer collision recovery receivers for RFID readers
Improved physical layer collision recovery receivers for RFID readers
复制标题
DOI：
10.1109/rfid.2014.6810719
复制
发表时间：
2014-04
期刊：
影响因子：
--
通讯作者：
J. Kaitovic;M. Rupp
中科院分区：
文献类型：
--
作者：
J. Kaitovic;M. Rupp
射频识别（RFID）系统通常在多个RFID标签的环境中工作。如果多个标签同时响应，则会发生冲突并丢弃信息。本文提出了一种新型的物理层冲突恢复机制。我们分析了库存时间的理论极限，并展示了我们的新方法如何接近这种理论最大值。我们提出了一种方法，解决更多的碰撞标签，使碰撞破坏性较小。在该方法中，执行通过波束成形对接收信号的后处理。此外，我们调查的影响，所提出的方法对系统性能的仿真手段。我们表明，我们的方法大大缩短了询问标签所需的时间。
Radio Frequency Identification (RFID) systems usually operate in a multiple RFID tag environment. If multiple tags respond simultaneously, a collision occurs and the information is discarded. In this paper, we propose a novel physical layer collision recovery mechanism. We analyse theoretical limits of the inventory time and show how our new method can approach such theoretical maxima. We propose a method that resolves more colliding tags by making collisions less destructive. In this method a postprocessing of the received signal by beamforming is performed. Furthermore, we investigate the influence of the proposed method on the system performance by means of simulations. We show that our method considerably shortens the time necessary to interrogate tags.