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    • 1. 发明授权
    • Adjustable local oscillator path in a communication device with a transmitter
    • 具有发射机的通信设备中的可调本地振荡器路径
    • US08472890B2
    • 2013-06-25
    • US11947597
    • 2007-11-29
    • Wei ZhuoAristotele HadjichristosTzu-wang Pan
    • Wei ZhuoAristotele HadjichristosTzu-wang Pan
    • H04B1/40
    • H04B1/109H04B1/525
    • A communication device includes a transmitter and a receiver. The receiver mixes a local oscillator (LO) signal with the received signal to downconvert the received signal to an intermediate frequency (IF). The LO path that feeds the LO signal to the downconverting mixer is controlled based on the transmit power of the transmitter. For high transmit power, the drive of the LO path is increased, thereby increasing the signal-to-noise ratio of the LO signal input into the mixer. For low transmit power levels, the drive to the LO path is decreased, reducing power consumption in the communication device. In this way, receiver path noise due to mixing of the LO phase noise with the self-generated transmitter signal is selectively controlled while incurring lower power consumption penalty. The communication device may be an access terminal configured for communication with a cellular radio network.
    • 通信设备包括发射机和接收机。 接收器将本地振荡器(LO)信号与接收到的信号混合,以将接收到的信号下变频到中频(IF)。 基于发射机的发射功率来控制将LO信号馈送到下变频混频器的LO路径。 对于高发射功率,LO路径的驱动增加,从而增加输入混频器的LO信号的信噪比。 对于低发射功率电平,降低LO路径的驱动,从而降低通信设备的功耗。 以这种方式,由于LO相位噪声与自发送发射机信号的混合引起的接收机路径噪声被选择性地控制,同时产生较低的功耗损失。 通信设备可以是被配置为与蜂窝无线电网络进行通信的接入终端。
    • 2. 发明申请
    • ADJUSTABLE LOCAL OSCILLATOR PATH IN A COMMUNICATION DEVICE WITH A TRANSMITTER
    • 在具有发射机的通信设备中可调谐的本地振荡器路径
    • US20090130994A1
    • 2009-05-21
    • US11947597
    • 2007-11-29
    • Wei ZhuoAristotele HadjichristosTzu-wang Pan
    • Wei ZhuoAristotele HadjichristosTzu-wang Pan
    • H04B1/40H04B1/04
    • H04B1/109H04B1/525
    • A communication device includes a transmitter and a receiver. The receiver mixes a local oscillator (LO) signal with the received signal to downconvert the received signal to an intermediate frequency (IF). The LO path that feeds the LO signal to the downconverting mixer is controlled based on the transmit power of the transmitter. For high transmit power, the drive of the LO path is increased, thereby increasing the signal-to-noise ratio of the LO signal input into the mixer. For low transmit power levels, the drive to the LO path is decreased, reducing power consumption in the communication device. In this way, receiver path noise due to mixing of the LO phase noise with the self-generated transmitter signal is selectively controlled while incurring lower power consumption penalty. The communication device may be an access terminal configured for communication with a cellular radio network.
    • 通信设备包括发射机和接收机。 接收器将本地振荡器(LO)信号与接收到的信号混合,以将接收到的信号下变频到中频(IF)。 基于发射机的发射功率来控制将LO信号馈送到下变频混频器的LO路径。 对于高发射功率,LO路径的驱动增加,从而增加输入混频器的LO信号的信噪比。 对于低发射功率电平,降低LO路径的驱动,从而降低通信设备的功耗。 以这种方式,由于LO相位噪声与自发送发射机信号的混合引起的接收机路径噪声被选择性地控制,同时产生较低的功耗损失。 通信设备可以是被配置为与蜂窝无线电网络进行通信的接入终端。