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    • 2. 发明授权
    • Single or dual complex subcarrier downconversion
    • 单或双复复子载波下变频
    • US09361488B2
    • 2016-06-07
    • US13165733
    • 2011-06-21
    • Dean Kawaguchi
    • Dean Kawaguchi
    • H04L27/06G06K7/00G06K19/07
    • G06K7/0008G06K19/0723H04Q2213/13095
    • A method for subcarrier downconversion and data detection according to one embodiment includes determining whether to use an upper sideband frequency section of a complex downconverter output, a lower sideband frequency section of the complex downconverter output, or both sideband frequency sections of the complex downconverter output; and processing the output corresponding to the selected sideband frequency section or sections based on the determination, wherein the processing includes correlation and data detection. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
    • 根据一个实施例的用于副载波下变频和数据检测的方法包括:确定是否使用复数下变频器输出的上边带频率部分,复数下变频器输出的下边带频率部分,或复数下变频器输出的两个边带频率部分; 以及基于所述确定来处理与所选择的边带频率部分相对应的输出,其中所述处理包括相关性和数据检测。 这种方法也可以被实现为使用用于执行各种操作的逻辑的系统。 还介绍了其他系统和方法。
    • 3. 发明授权
    • RFID reader with camera, video, and/or audio capture device
    • 带有摄像头,视频和/或音频采集设备的RFID阅读器
    • US09202091B2
    • 2015-12-01
    • US13224192
    • 2011-09-01
    • Dean Kawaguchi
    • Dean Kawaguchi
    • G06K7/01G06K7/10
    • G06K7/10009
    • A media capture device coupled to an RFID reader and/or antenna. A system in one embodiment includes a Radio Frequency Identification (RFID) reader; an antenna coupled to the RFID reader; and a media capture device coupled to at least one of the reader and the antenna. A method in another embodiment includes capturing media using a media capture device coupled to at least one of a Radio Frequency Identification (RFID) reader and an antenna coupled to the RFID reader upon occurrence of a trigger event.
    • 耦合到RFID读取器和/或天线的媒体捕获设备。 一个实施例中的系统包括射频识别(RFID)读取器; 耦合到RFID读取器的天线; 以及耦合到读取器和天线中的至少一个的媒体捕获设备。 另一实施例中的方法包括:在发生触发事件时,使用耦合到射频识别(RFID)读取器和耦合到RFID读取器的天线中的至少一个的媒体捕获设备来捕获媒体。
    • 5. 发明授权
    • Devices employing modulator switching and methods thereof
    • 采用调制器切换的装置及其方法
    • US08823493B2
    • 2014-09-02
    • US12814095
    • 2010-06-11
    • Prasad PanchalanEdward M. Farrell
    • Prasad PanchalanEdward M. Farrell
    • H04L17/10H04Q5/22
    • G06K19/07749G06K7/10009G06K19/0723
    • In one embodiment, a RFID reader circuit includes a RF source input in a transmitting path, a RF modulator in parallel with a bypass, the RF modulator and the bypass being selectively coupled to the RF source input, at least one switch for selectively coupling an output of the RF modulator to the transmitting path, and a RF power amplifier in the transmitting path. In another embodiment, a RFID system includes a plurality of RFID tags, and a RFID reader, the RFID reader comprising a RFID reader circuit. The circuit includes a RF source input in a transmitting path, a RF modulator in parallel with a bypass, the RF modulator and the bypass being selectively coupled to the RF source input, at least one switch for selectively coupling an output of the RF modulator to the transmitting path, and a RF power amplifier in the transmitting path.
    • 在一个实施例中,RFID读取器电路包括发射路径中的RF源输入,与旁路并联的RF调制器,RF调制器和旁路选择性地耦合到RF源输入,至少一个开关,用于选择性地耦合 RF调制器的输出到发送路径,以及发送路径中的RF功率放大器。 在另一个实施例中,RFID系统包括多个RFID标签和RFID读取器,RFID读取器包括RFID读取器电路。 电路包括在发射路径中的RF源输入,与旁路并联的RF调制器,RF调制器和旁路选择性地耦合到RF源输入,至少一个开关,用于选择性地将RF调制器的输出耦合到 发射路径和发射路径中的RF功率放大器。
    • 6. 发明授权
    • Devices employing fast carrier cancellation and methods thereof
    • 采用快速载波消除的装置及其方法
    • US08760261B2
    • 2014-06-24
    • US12814053
    • 2010-06-11
    • Prasad PanchalanManu H. R. RaoEdward M. Farrell
    • Prasad PanchalanManu H. R. RaoEdward M. Farrell
    • H04Q5/22H04B15/00H04K1/02
    • G06K7/10297
    • In one embodiment, a RFID reader circuit includes a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. In another embodiment, a RFID system includes a plurality of RFID tags; and at least one RFID reader, the at least one RFID reader comprising a RFID reader circuit, the circuit comprising: a RF power amplifier coupled to a coupler; an amplitude and phase adjustor module coupled to an output of the coupler; a signal combiner module coupled to an output of the amplitude and phase adjustor module; and a low noise amplifier coupled to an output of the signal combiner module. Other systems, methods, and circuits are described as well.
    • 在一个实施例中,RFID读取器电路包括耦合到耦合器的RF功率放大器; 耦合到耦合器的输出的振幅和相位调节器模块; 耦合到幅度和相位调整器模块的输出的信号组合器模块; 以及耦合到信号组合器模块的输出的低噪声放大器。 在另一个实施例中,RFID系统包括多个RFID标签; 以及至少一个RFID读取器,所述至少一个RFID读取器包括RFID读取器电路,所述电路包括:耦合到耦合器的RF功率放大器; 耦合到耦合器的输出的振幅和相位调节器模块; 耦合到幅度和相位调整器模块的输出的信号组合器模块; 以及耦合到信号组合器模块的输出的低噪声放大器。 还描述了其他系统,方法和电路。
    • 7. 发明授权
    • RFID system with distributed readers
    • 具有分布式读取器的RFID系统
    • US08717144B2
    • 2014-05-06
    • US12111808
    • 2008-04-29
    • Dean KawaguchiEdward M. Farrell
    • Dean KawaguchiEdward M. Farrell
    • H04Q5/22
    • H04Q9/00H04Q2209/47H04Q2209/886
    • A system in one embodiment includes a plurality of Radio Frequency Identification (RFID) readers, each reader being capable of using a single antenna for both transmit and receive functions, wherein, during operation, one of the readers transmits and at least another of the readers receives a response to the transmission from an RFID device. A system in another embodiment includes a plurality of Radio Frequency Identification (RFID) readers, each reader having at least one antenna mounted on a housing thereof, wherein, during operation, the reader transmitting emits a signal sufficient to communicate with a battery assisted passive RFID device at a range of at least 20 meters. Additional systems and methods are also presented.
    • 一个实施例中的系统包括多个射频识别(RFID)读取器,每个读取器能够使用单个天线用于发射和接收功能,其中,在操作期间,读取器之一传输和至少另一个读取器 从RFID设备接收对传输的响应。 另一实施例中的系统包括多个射频识别(RFID)读取器,每个读取器具有安装在其外壳上的至少一个天线,其中在操作期间,读取器发射发出足以与电池辅助无源RFID通信的信号 设备在至少20米的范围内。 还介绍了其他系统和方法。
    • 8. 发明申请
    • BATTERY ASSISTED RFID COMMAND SET AND INTERFERENCE CONTROL
    • 电池辅助RFID命令集和干扰控制
    • US20130241705A1
    • 2013-09-19
    • US13859674
    • 2013-04-09
    • INTELLEFLEX CORPORATION
    • Alfonso RodriguezFarron DacusJohannes Albertus van Nierkerk
    • G06K7/10
    • G06K7/10009H04Q9/00H04Q2209/47H04Q2209/75H04Q2209/88
    • Specialized battery assisted command set design methods are disclosed that provide for interference rejection using highly sensitive but relatively broadband RFID tags. The command set design also supports RFID system RF power control for further interference control. The command set design also allows for convenient expansion to active transmitters and receivers in tags operating within the same system. Embodiments of the present invention provide RFID systems having battery-assisted, Semi-Passive RFID tags that operate with sensitive transistor based square law tag receivers utilizing a plurality of tag receiver dynamic range states. Additional enhancement attained via power leveling methods that optimize the amount of transmitted power and interference from a reader in relation to the sensitivity of the RFID tags, their ranges from the reader, and the unique physics of the backscatter RFID radio link.
    • 公开了专门的电池辅助命令集设计方法,其提供使用高度灵敏但相对宽的RFID标签的干扰抑制。 命令集设计还支持RFID系统RF功率控制,进一步进行干扰控制。 命令集设计还允许在同一系统内操作的标签中方便地扩展到主动发射机和接收机。 本发明的实施例提供具有电池辅助的半无源RFID标签的RFID系统,其利用多个标签接收器动态范围状态使用基于灵敏晶体管的平方律标签接收器进行操作。 通过功率调整方法获得的附加增强,其优化与RFID标签的灵敏度相关的发送功率和干扰量,读取器的范围以及反向散射RFID无线电链路的独特物理性能。