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    • 1. 发明申请
    • Direct conversion receiver with DC offset compensation
    • 具有直流偏移补偿的直接转换接收器
    • US20060073803A1
    • 2006-04-06
    • US11238644
    • 2005-09-29
    • Masatoshi IgarashiHiroshi KomoriTakeaki Watanabe
    • Masatoshi IgarashiHiroshi KomoriTakeaki Watanabe
    • H04B1/00H04B1/10H04L25/06H04B15/00
    • H04L25/061H04B1/30
    • A direct conversion receiver includes a mixer for converting an RF signal into a baseband signal, a dynamic DC offset compensator for compensating for a dynamic DC offset caused by the effect of second order nonlinear distortion of the mixer on an interfering wave that enters the input terminals of the mixer, and a static DC offset compensator for compensating for a static DC offset caused by self-mixing of a local signal and a leakage component of the local signal that appears at the input terminals of the mixer. The static DC offset compensation starts at a time t1 after a DC offset compensation operation has started. The static DC offset compensation is finished at the next time t2, and then the dynamic DC offset compensation starts. The dynamic DC offset compensation is finished at the next time t3. With this configuration, only a change in DC offset due to the dynamic DC offset is compensated after compensating for the static DC offset component. The dynamic DC offset compensator does not have an element for storing the magnitude of the static DC offset.
    • 直接转换接收机包括用于将RF信号转换为基带信号的混频器,用于补偿由混频器的二阶非线性失真对进入输入端的干扰波引起的动态DC偏移的动态DC偏移补偿器 以及用于补偿由本地信号的自混合引起的静态DC偏移和出现在混频器输入端的本地信号的泄漏分量的静态DC偏移补偿器。 在DC偏移补偿操作开始之后,静态DC偏移补偿在时间t 1开始。 静态DC偏移补偿在下一个时间t 2完成,然后动态DC偏移补偿开始。 动态DC偏移补偿在下一个时间t 3完成。 通过这种配置,在补偿静态DC偏移分量之后,仅补偿由于动态DC偏移引起的DC偏移的变化。 动态DC偏移补偿器没有用于存储静态DC偏移的幅度的元素。
    • 4. 发明授权
    • Direct conversion receiver with DC offset compensation
    • 具有直流偏移补偿的直接转换接收器
    • US07409199B2
    • 2008-08-05
    • US11238644
    • 2005-09-29
    • Masatoshi IgarashiHiroshi KomoriTakeaki Watanabe
    • Masatoshi IgarashiHiroshi KomoriTakeaki Watanabe
    • H04B1/10
    • H04L25/061H04B1/30
    • A direct conversion receiver includes a mixer for converting an RF signal into a baseband signal, a dynamic DC offset compensator for compensating for a dynamic DC offset caused by the effect of second order nonlinear distortion of the mixer on an interfering wave that enters the input terminals of the mixer, and a static DC offset compensator for compensating for a static DC offset caused by self-mixing of a local signal and a leakage component of the local signal that appears at the input terminals of the mixer. The static DC offset compensation starts at a time t1 after a DC offset compensation operation has started. The static DC offset compensation is finished at the next time t2, and then the dynamic DC offset compensation starts. The dynamic DC offset compensation is finished at the next time t3. With this configuration, only a change in DC offset due to the dynamic DC offset is compensated after compensating for the static DC offset component. The dynamic DC offset compensator does not have an element for storing the magnitude of the static DC offset.
    • 直接转换接收机包括用于将RF信号转换为基带信号的混频器,用于补偿由混频器的二阶非线性失真对进入输入端的干扰波引起的动态DC偏移的动态DC偏移补偿器 以及用于补偿由本地信号的自混合引起的静态DC偏移和出现在混频器输入端的本地信号的泄漏分量的静态DC偏移补偿器。 在DC偏移补偿操作开始之后,静态DC偏移补偿在时间t 1开始。 静态DC偏移补偿在下一个时间t 2完成,然后动态DC偏移补偿开始。 动态DC偏移补偿在下一个时间t 3完成。 通过这种配置,在补偿静态DC偏移分量之后,仅补偿由于动态DC偏移引起的DC偏移的变化。 动态DC偏移补偿器没有用于存储静态DC偏移的幅度的元素。