公开(公告)号：US20210083906A1

公开(公告)日：2021-03-18

申请号：US17072974

申请日：2020-10-16

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

发明人： Gerd KILIAN ,  Jakob KNEISSL ,  Frank OBERNOSTERER ,  Raimund MEYER ,  Eberhard GAMM ,  Joerg ROBERT ,  Johannes WECHSLER ,  Josef BERNHARD ,  Michael SCHLICHT

IPC分类号： H04L25/02

摘要： A data receiver configured to receive a signal having at least two partial data packets, the data receiver being configured to estimate a state of a transmission channel, to obtain first channel state information, to demodulate a first set of received symbols from different data packets, to obtain a first set of received encoded bits, wherein the data receiver is configured to decode the first set of received encoded bits to determine, a first set of estimated encoded bits which corresponds more likely to a first set of transmitted encoded bits than the received encoded bits, and to map the first set of estimated bits to estimated transmission symbols using a mapping rule matching a transmitter-side mapping rule to obtain a first set of estimated transmission symbols, and to determine second channel state information using the first set of estimated transmission symbols.

公开(公告)号：US20190246315A1

公开(公告)日：2019-08-08

申请号：US16387417

申请日：2019-04-17

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

发明人： Gerd KILIAN ,  Josef BERNHARD ,  Joerg ROBERT ,  Jakob KNEISSL ,  Johannes WECHSLER ,  Stefan ERETH

IPC分类号： H04W28/06 ,  H04L1/00 ,  H04L29/06

CPC分类号： H04W28/065 ,  H04L1/0007 ,  H04L1/0041 ,  H04L69/22 ,  H04W52/0216 ,  H04W52/0219 ,  H04W52/0229 ,  Y02D70/00

摘要： Embodiments provide a transfer method for transferring data of variable length using a fixedly specified number of sub-data packets to which the data of variable length is distributed.

公开(公告)号：US20160328638A1

公开(公告)日：2016-11-10

申请号：US15147236

申请日：2016-05-05

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

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

IPC分类号： G06K19/07 ,  G06K7/00

CPC分类号： G06K19/0723 ,  G06K7/0095 ,  G06K7/10029

摘要： A reader for wirelessly receiving a signal from a tag, the signal having a portion on a first side, a portion on a second side and a synchronization sequence to be detected between the first and the second side, wherein the portion on the first side, the synchronization sequence and the portion on the second side are serially arranged with each other, has a processor. The processor is configured for storing the received signal, for detecting the synchronization sequence in the received signal, for calculating a transmission characteristic between the tag and the reader, using the portion of the received signal on the first side and for extracting a payload information from the portion of the received signal on the second side, using the calculated transmission characteristic.

摘要翻译： 一种用于从标签无线地接收信号的读取器，所述信号具有第一侧上的一部分，第二侧的部分以及待在第一和第二侧之间检测的同步序列，其中第一侧上的部分， 同步序列和第二侧的部分彼此串联布置，具有处理器。 处理器被配置为存储用于检测接收到的信号中的同步序列的接收信号，用于使用第一侧的接收信号的部分来计算标签和读取器之间的传输特性，并从 使用所计算的传输特性在第二侧的接收信号的部分。

公开(公告)号：US20210112485A1

公开(公告)日：2021-04-15

申请号：US17130132

申请日：2020-12-22

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

发明人： Frank OBERNOSTERER ,  Raimund MEYER ,  Gerd KILIAN ,  Josef BERNHARD ,  Johannes WECHSLER ,  Jakob KNEISSL ,  Michael SCHLICHT ,  Joerg ROBERT

IPC分类号： H04W48/12 ,  H04W72/04

摘要： Embodiments provide a controller for a participant of a communication system wirelessly communicates in a frequency band used for communication by a plurality of communication systems, wherein the controller is configured to identify a network-specific channel access pattern, wherein the network-specific channel access pattern indicates a frequency hop-based and/or time hop-based occupancy of resources of the frequency band that is usable for the communication of the communication system, wherein the controller is configured to identify a relative channel access pattern, wherein the relative channel access pattern indicates, from the usable frequency hop-based and/or time hop-based occupancy of resources of the network-specific channel access pattern, an occupancy of resources that is to be used for the transfer of data of the participant.

公开(公告)号：US20180349753A1

公开(公告)日：2018-12-06

申请号：US16059741

申请日：2018-08-09

申请人： Frauhofer-Gesellschaff zur Foerderung der angewandlen Frorschung 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： G06K19/077 ,  G06K7/10

CPC分类号： G06K19/07796 ,  G06K7/10019 ,  G06K7/10039

摘要： What is described is an Radio Frequency Identification (RFID) tag configured for communicating with an Radio Frequency Identification (RFID) reader, wherein the RFID tag is configured to receive a query command from the RFID reader, to measure a duration of a TRcal signal comprised by the query command, and to determine an individual Backscatter Link Frequency for communicating with the RFID reader based on the measured duration of the TRcal signal. The invention also refers to an RFID reader and to a corresponding method.

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。