公开(公告)号：US20160328583A1

公开(公告)日：2016-11-10

申请号：US15148483

申请日：2016-05-06

申请人： Fraunfofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. ,  Friedrich-Alexander-Universitaet Erlangen-Nuernberg

发明人： Hazem ELSAID IBRAHIM ,  Hamed KENAWY ,  Joerg ROBERT ,  Albert HEUBERGER ,  Wolfram STRAUSS

IPC分类号： G06K7/10

CPC分类号： G06K7/10069 ,  G06K7/10019 ,  G06K7/10029 ,  G06K7/10039 ,  G06K7/10089

摘要： Embodiments provide an RFID reader. The RFID reader includes a collision detector, a decoder and a frame length adjuster. The collision detector is configured to detect for each slot of a plurality of slots of a current frame, in which a collision of signals transmitted by at least two RFID tags occurred, a signal property of a signal of the signals transmitted by at least two RFID tags. The decoder is configured to decode for the slot in which the collision is detected the signal of the signals transmitted by the at least two RFID tags using the detected signal property, wherein a collision recover probability describing a probability that the decoder can accurately decode the one signal depends on a signal-to-noise ratio (SNR) of the current frame. The frame length adjuster is configured to adjust a frame length of a subsequent frame in dependence on the collision recover probability.

摘要翻译： 实施例提供RFID读取器。 RFID读取器包括碰撞检测器，解码器和帧长度调节器。 冲突检测器被配置为检测由当前帧的多个时隙中的至少两个RFID标签发送的信号的冲突发生的至少两个RFID发送的信号的信号的信号特性的每个时隙 标签。 解码器被配置为使用检测到的信号属性来解码检测到由至少两个RFID标签发送的信号的信号的冲突检测的时隙，其中描述解码器可以准确地解码该一个的概率的冲突恢复概率 信号取决于当前帧的信噪比（SNR）。 帧长调整器被配置为根据冲突恢复概率来调整后续帧的帧长度。