公开(公告)号：US20100026460A1

公开(公告)日：2010-02-04

申请号：US12328385

申请日：2008-12-04

申请人： Donghan LEE ,  Ji-Hoon BAE ,  Cheng-Hao QUAN ,  Kwang-Soo CHO ,  Gil Young CHOI ,  Jong-Suk CHAE ,  Sang-Gi KANG

发明人： Donghan LEE ,  Ji-Hoon BAE ,  Cheng-Hao QUAN ,  Kwang-Soo CHO ,  Gil Young CHOI ,  Jong-Suk CHAE ,  Sang-Gi KANG

IPC分类号： H04Q5/22 ,  H03M1/66

CPC分类号： G06K7/0008 ,  G06K7/10198 ,  H04B5/005 ,  H04B5/0062 ,  H04B17/354 ,  H04L27/34

摘要： A method and apparatus for suppressing a transmit leakage signal of a radio frequency identification (RFID) reader is provided. The apparatus includes: a first power distributor distributing a transmission signal to output a first transmission signal and a second transmission signal; a second power distributor distributing the second transmission signal to output a third transmission signal and a fourth transmission signal; a first amplitude/phase converter converting an amplitude and a phase of the first transmission signal to generate a first converted signal; a second amplitude/phase converter converting an amplitude and a phase of the third transmission signal to generate a second converted signal; a first power combiner combining the first converted signal with a first leakage signal generated in association with the fourth transmission signal; and a second power combiner combining the second converted signal with a second leakage signal generated in association with the fourth transmission signal.

摘要翻译： 提供一种用于抑制射频识别（RFID）读取器的发送泄漏信号的方法和装置。 该装置包括：分配传输信号以输出第一传输信号和第二传输信号的第一功率分配器; 分配第二传输信号以输出第三传输信号和第四传输信号的第二功率分配器; 转换第一传输信号的幅度和相位以产生第一转换信号的第一幅度/相位转换器; 转换第三发送信号的幅度和相位的第二幅度/相位转换器，以产生第二转换信号; 第一功率组合器，其将所述第一转换信号与与所述第四发送信号相关联地生成的第一泄漏信号组合; 以及第二功率组合器，其将所述第二转换信号与与所述第四发送信号相关联地生成的第二泄漏信号组合。

公开(公告)号：US20090289767A1

公开(公告)日：2009-11-26

申请号：US12368362

申请日：2009-02-10

申请人： Yoshinori Tanaka

发明人： Yoshinori Tanaka

IPC分类号： H04Q5/22

CPC分类号： G06K7/0008 ,  G06K7/10198

摘要： An RFID interrogator includes a data transmitting unit, a data receiving unit, a tag-reception SINR estimating unit, and a transmission controlling unit. The data transmitting unit transmits a transmission signal to an electronic tag. The data receiving unit receives from the electronic tag a response signal in response to the transmission signal within a predetermined time after the transmission signal is transmitted. The tag-reception SINR estimating unit estimates an SINR value related to reception on the electronic tag side as a tag-reception SINR estimation value based on the response signal. The transmission controlling unit variably controls a modulation index of the transmission signal so that the tag-reception SINR estimation value is a reception-allowable predetermined SINR value.

摘要翻译： RFID询问器包括数据发送单元，数据接收单元，标签接收SINR估计单元和发送控制单元。 数据发送单元向电子标签发送发送信号。 在发送信号之后的预定时间内，数据接收单元响应于发送信号从电子标签接收响应信号。 标签接收SINR推定部基于响应信号，将与电子标签侧的接收有关的SINR值作为标签接收SINR推定值。 发送控制单元可变地控制发送信号的调制指标，使得标签接收SINR估计值为接收允许的预定SINR值。

公开(公告)号：US20080290995A1

公开(公告)日：2008-11-27

申请号：US12056098

申请日：2008-03-26

申请人： Logan Bruns ,  Sayan Chakraborty

发明人： Logan Bruns ,  Sayan Chakraborty

IPC分类号： H04Q5/22

CPC分类号： G06K7/0008 ,  G06K7/10198 ,  H04Q2213/13095

摘要： A method for optimizing communication between an RFID reader and an RFID tag. Initially, an RFID tag is detected, and the tag type is passively determined. An optimization goal is then selected. An optimal parameter set for communicating with the tag, based on the tag type and the optimization goal is then determined. The reader is then reconfigured using the optimal parameter set to communicate with the tag.

摘要翻译： 一种用于优化RFID读取器和RFID标签之间的通信的方法。 最初，检测到RFID标签，并且被动地确定标签类型。 然后选择优化目标。 然后确定基于标签类型和优化目标与标签通信的最佳参数集。 然后使用最佳参数集来重新配置读取器以与标签通信。

公开(公告)号：US20080100433A1

公开(公告)日：2008-05-01

申请号：US11925298

申请日：2007-10-26

申请人： Markus Desch

发明人： Markus Desch

IPC分类号： G08B26/00

CPC分类号： G06K7/0008 ,  G06K7/10198 ,  G06K7/10297

摘要： The invention relates to a method for data transmission between a write/read station of an RFID (radio frequency identification) system and at least one RFID transponder, wherein the write/read station emits a query in order to demand an initial reply from the at least one transponder and wherein the write/read station emits an operating mode instruction before, with, or after the query, which instruction instructs every transponder that receives this query and operating mode instruction to emit its initial reply to the write/read station without or with a checksum.

摘要翻译： 本发明涉及一种用于RFID（射频识别）系统的写入/读取站与至少一个RFID应答器之间的数据传输的方法，其中写入/读取站发出查询以便要求来自at 至少一个应答器，并且其中所述写/读站在所述查询之前，之后或之后发出操作模式指令，所述指令指示接收到该查询的每个应答器和操作模式指令向其写/读站发出其初始回复， 校验和。

公开(公告)号：US20080088473A1

公开(公告)日：2008-04-17

申请号：US11621772

申请日：2007-01-10

申请人： Hyun Chul Kim ,  Hyun Chul Lee ,  Dong Ho Yoo ,  Hyun Deuk Choi ,  Chang Sup Lee

发明人： Hyun Chul Kim ,  Hyun Chul Lee ,  Dong Ho Yoo ,  Hyun Deuk Choi ,  Chang Sup Lee

IPC分类号： G08B1/00

CPC分类号： G06K7/0008 ,  G06K7/10198

摘要： Disclosed herein is a Radio Frequency Identification (RFID) system and method for controlling distance ranges. The RFID system includes a plurality of RFID tags, a plurality of readers, and middleware. The RFID tags receive position coordinates and time data through signals from a satellite and store data. The readers transmit and receive data to and from the RFID tags. The middleware forms a network in conjunction with the readers and controls distance ranges between the RFID tags and the readers.

摘要翻译： 本文公开了一种用于控制距离范围的射频识别（RFID）系统和方法。 RFID系统包括多个RFID标签，多个读取器和中间件。 RFID标签通过来自卫星的信号和存储数据接收位置坐标和时间数据。 读取器向RFID标签发送和接收数据。 中间件与读卡器结合形成网络，并控制RFID标签与读卡器之间的距离范围。

公开(公告)号：US20080019437A1

公开(公告)日：2008-01-24

申请号：US11826852

申请日：2007-07-19

申请人： Toshio Shimizu

发明人： Toshio Shimizu

IPC分类号： H03K7/04

CPC分类号： G06K7/10029 ,  G06K7/10198

摘要： A data transmission apparatus is provided, which is capable of performing good communication with a noncontact data carrier under the circumstances where pulse noise is generated. A noise detection circuit in a reader/writer detects a generation period of noise contained in received signals. A communication time calculating circuit calculates estimated time for communication to be performed for an IC card. A timing signal generation unit determines transmission start timing based on the noise generation period and the estimated communication time.

摘要翻译： 提供一种数据传输装置，其能够在产生脉冲噪声的情况下与非接触式数据载体进行良好的通信。 读取器/写入器中的噪声检测电路检测接收信号中包含的噪声的产生周期。 通信时间计算电路计算对IC卡进行通信的估计时间。 定时信号生成单元基于噪声生成周期和估计通信时间来决定发送开始时刻。

公开(公告)号：US20060267736A1

公开(公告)日：2006-11-30

申请号：US11139681

申请日：2005-05-31

申请人： Robert Tiernay ,  Dale Scott ,  Charles Johnson ,  Filip Weytjens ,  Matthew Burnett ,  Kelly Gravelle

发明人： Robert Tiernay ,  Dale Scott ,  Charles Johnson ,  Filip Weytjens ,  Matthew Burnett ,  Kelly Gravelle

IPC分类号： H04Q5/22

CPC分类号： G06K7/10198 ,  G06K19/0707 ,  G06K19/0712 ,  G06K19/0723 ,  H04Q5/22

摘要： A multi-mode, preferably dual mode, radio frequency identification (RFID) tag is adapted for automatic detection of whether a RFID reader located within communication range of the RFID tag is transmitting a continuous wave (CW) or modulated wave types of RF signal, and accordingly, mandating a response from the tag in read-only (RO) mode or read/write (R/W) mode, respectively. The tag includes means for designating one of the RO and R/W operating modes as a default mode of the tag, and for switching the tag from its default mode to its other operating mode, and vice versa, according to a rule for determining the frequency of occurrence of a selected event related to signal type of the reader. A device-implemented method of this automatic detection, and a method of fabricating the tag, are also disclosed.

公开(公告)号：US20020057191A1

公开(公告)日：2002-05-16

申请号：US09079449

申请日：1998-05-14

发明人： BENJAMIN G. BATES ,  SCOTT HAHN

IPC分类号： H04Q005/22

CPC分类号： H04W92/00 ,  B67D7/145 ,  G01S13/825 ,  G06K7/0008 ,  G06K7/10198 ,  G06K19/0723 ,  H04W74/00 ,  H04W76/10

摘要： The present invention includes wireless communication systems, interfacing devices, communication methods, methods of interfacing with an interrogator, and methods of operating an interrogator. According to one embodiment, a wireless communication system includes a remote communication device; an interrogator configured to output a forward link wireless communication and receive a reply link wireless communication from the remote communication device responsive to the forward link wireless communication; and an interface device configured to interface with the interrogator using a wireless medium, the interrogator being configured to be controlled by the interface device.

摘要翻译： 本发明包括无线通信系统，接口设备，通信方法，与询问器接口的方法以及操作询问器的方法。 根据一个实施例，无线通信系统包括远程通信设备; 询问器，被配置为响应于所述前向链路无线通信，从所述远程通信设备输出前向链路无线通信并接收回复链路无线通信; 以及被配置为使用无线介质与询问器接口的接口设备，所述询问器被配置为由接口设备控制。

公开(公告)号：US20230419054A1

公开(公告)日：2023-12-28

申请号：US18213106

申请日：2023-06-22

申请人： SICK AG

发明人： Frank SCHÜTZ

IPC分类号： G06K7/00 ,  G06K7/14 ,  G06K7/10

CPC分类号： G06K7/0021 ,  G06K7/1413 ,  G06K7/1417 ,  G06K7/10297 ,  G06K7/10198

摘要： A reading apparatus for a contactless readout of information on objects that can be guided past the reading apparatus, wherein the reading apparatus has a data processing unit, a scanner unit, a communication unit, a contact recognition unit, and a housing. The contact recognition unit is configured to recognize contacts with the housing of the reading apparatus.

公开(公告)号：US11736959B2

公开(公告)日：2023-08-22

申请号：US17364555

申请日：2021-06-30

申请人： RFMicron, Inc.

发明人： Shahriar Rokhsaz

IPC分类号： H03J3/20 ,  H04W24/02 ,  H04W52/02 ,  H04B1/40 ,  G06K19/07 ,  G06K7/10 ,  H04W84/18 ,  H04W76/14

CPC分类号： H04W24/02 ,  G06K7/10198 ,  G06K7/10316 ,  G06K7/10346 ,  G06K7/10366 ,  G06K19/0717 ,  G06K19/0723 ,  H03J3/20 ,  H04B1/40 ,  H04W52/0261 ,  H03J2200/10 ,  H04W76/14 ,  H04W84/18 ,  Y02D30/70

摘要： A radio frequency (RF) circuit includes a tank circuit having a selectively variable impedance. The RF circuit further includes a tuning circuit adapted to dynamically vary the impedance of the tank circuit, and to develop a first quantized value representative of a change to impedance of the tank circuit. The RF circuit further includes a detector circuit adapted to develop a second quantized value representative of a field strength of a received RF signal.