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    • 2. 发明申请
    • METHOD AND APPARATUS FOR SIGNAL DETECTION IN RADIO FREQUENCY IDENTIFICATION SYSTEM
    • 无线电频率识别系统中信号检测的方法与装置
    • US20080150700A1
    • 2008-06-26
    • US11946480
    • 2007-11-28
    • Jong-Rim LeeSang-Yun HwangChul-Jin KimJune-Hyeok ImHyun-Kuk ChoiChul-Hyun Park
    • Jong-Rim LeeSang-Yun HwangChul-Jin KimJune-Hyeok ImHyun-Kuk ChoiChul-Hyun Park
    • G06K7/00H04Q5/22
    • G06K7/0008H04B1/30H04B1/525
    • Disclosed is an apparatus and method for signal detection according to frequency bands used in an RFID system. The apparatus includes a low-noise amplifier for low-noise amplifying a received signal, a receiver unit for detecting a CW signal and a tag signal, a transmitter unit for frequency up-converting and outputting an input signal, a PLL for generating a frequency signal according to a transmission signal band or a reception signal band, a receiver unit switch for connecting the receiver unit with the low-noise amplifier or a directional coupler, an antennas switch for connecting the antenna with the directional coupler or low-noise amplifier, and a controller unit for controlling a frequency of the frequency signal generated by the PLL, turning off transmission power in a case of an LBT scheme, controlling the receiver unit switch and the antenna switch, and determining if a corresponding channel is an idle channel.
    • 公开了一种根据RFID系统中使用的频带进行信号检测的装置和方法。 该装置包括用于低噪声放大接收信号的低噪声放大器,用于检测CW信号的接收器单元和标签信号,用于对输入信号进行上变频和输出的发射器单元,用于产生频率的PLL 根据发送信号频带或接收信号频带的信号,用于将接收机单元与低噪声放大器或定向耦合器连接的接收机单元开关,用于将天线与定向耦合器或低噪声放大器连接的天线开关, 以及控制单元,用于控制由PLL产生的频率信号的频率,在LBT方案的情况下关闭发送功率,控制接收机单元切换和天线切换,以及确定对应的信道是否为空闲信道。
    • 3. 发明授权
    • Method and apparatus for signal detection in radio frequency identification system
    • 射频识别系统信号检测方法及装置
    • US08284032B2
    • 2012-10-09
    • US11946480
    • 2007-11-28
    • Jong-Rim LeeSang-Yun HwangChul-Jin KimJune-Hyeok ImHyun-Kuk ChoiChul-Hyun Park
    • Jong-Rim LeeSang-Yun HwangChul-Jin KimJune-Hyeok ImHyun-Kuk ChoiChul-Hyun Park
    • H04Q5/22
    • G06K7/0008H04B1/30H04B1/525
    • Disclosed is an apparatus and method for signal detection according to frequency bands used in an RFID system. The apparatus includes a low-noise amplifier for low-noise amplifying a received signal, a receiver unit for detecting a CW signal and a tag signal, a transmitter unit for frequency up-converting and outputting an input signal, a PLL for generating a frequency signal according to a transmission signal band or a reception signal band, a receiver unit switch for connecting the receiver unit with the low-noise amplifier or a directional coupler, an antennas switch for connecting the antenna with the directional coupler or low-noise amplifier, and a controller unit for controlling a frequency of the frequency signal generated by the PLL, turning off transmission power in a case of an LBT scheme, controlling the receiver unit switch and the antenna switch, and determining if a corresponding channel is an idle channel.
    • 公开了一种根据RFID系统中使用的频带进行信号检测的装置和方法。 该装置包括用于低噪声放大接收信号的低噪声放大器,用于检测CW信号的接收器单元和标签信号,用于对输入信号进行上变频和输出的发射器单元,用于产生频率的PLL 根据发送信号频带或接收信号频带的信号,用于将接收机单元与低噪声放大器或定向耦合器连接的接收机单元开关,用于将天线与定向耦合器或低噪声放大器连接的天线开关, 以及控制单元,用于控制由PLL产生的频率信号的频率,在LBT方案的情况下关闭发送功率,控制接收机单元切换和天线切换,以及确定对应的信道是否为空闲信道。