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    • 4. 发明专利
    • Under-sampling digital pre-distortion architecture
    • 不采取数字化的预设架构
    • JP2014179981A
    • 2014-09-25
    • JP2014041322
    • 2014-03-04
    • Analog Devices Technologyアナログ・デヴァイシズ・テクノロジー
    • DON CHEN
    • H03F1/32H03F3/24
    • H03F1/3247H03F1/3258H03F3/189H03F3/245H03F2201/3209H03F2201/3224H03F2201/3233H03M1/0614H03M1/1245
    • PROBLEM TO BE SOLVED: To provide an improved power amplifier that compensates for nonlinearity efficiently with low power consumption.SOLUTION: A amplifier system may include a pre-distorter for receiving an input signal to generate a pre-distortion signal, a first converter for receiving the pre-distortion signal to generate a pre-amplified signal, a power amplifier for receiving the pre-amplified signal to generate an output signal on the basis of the pre-amplified signal and the input signal, and a second converter for sampling the output signal to generate a feedback signal. The power amplifier may produce a distortion signal at a first frequency, the second converter may sample the output signal by the use of a timing signal with a second frequency lower than the first frequency to generate the feedback signal, and the pre-distorter may, on the basis of the feedback signal, pre-distort the pre-distortion signal to reduce the distortion signal at the first frequency.
    • 要解决的问题:提供一种改进的功率放大器,其以低功耗有效地补偿非线性。解决方案:放大器系统可以包括用于接收输入信号以产生预失真信号的预失真器,用于接收的第一转换器 用于产生预放大信号的预失真信号,用于接收预放大信号以根据预放大信号和输入信号产生输出信号的功率放大器,以及用于对输出进行采样的第二转换器 信号以产生反馈信号。 功率放大器可以产生第一频率的失真信号,第二转换器可以通过使用具有低于第一频率的第二频率的定时信号对输出信号进行采样,以产生反馈信号, 在反馈信号的基础上,预失真信号,以减小第一频率的失真信号。
    • 7. 发明专利
    • Radio frequency transmitter noise cancellation
    • 无线电频率发射机噪声消除
    • JP2014179986A
    • 2014-09-25
    • JP2014048493
    • 2014-03-12
    • Analog Devices Technologyアナログ・デヴァイシズ・テクノロジー
    • PATRICK PRATTPEADAR ANTONY FORBESDAVID J MCLAURINMARTIN MCCORMICK
    • H04B1/10H04B1/48
    • H04B1/0475H04B1/525
    • PROBLEM TO BE SOLVED: To provide a low-power and reduced-size RF noise cancellation circuit that is able to cost efficiently minimize transmitter noise leakage in received signals without having its adaptation rate reduced by external blockers.SOLUTION: Transmitter noise cancellation may be applied on a channel by channel basis to active channels of an incoming radio frequency signal received at a receiver. A noise cancellation filter may be provided for each active channel in a predetermined signal band. Applying noise cancellation on a per active channel basis instead of to the entire receive band may substantially reduce the filtering requirement and number of filter coefficients or taps to save power and reduce manufacturing costs. Channelized transmitter noise cancellers, multi transmitter-receiver cross coupling cancellers, and hybrid full signal band and channelized transmitter noise cancellers are also provided.
    • 要解决的问题:提供低功率和小尺寸的RF噪声消除电路,其能够有效地最小化接收信号中的发射机噪声泄漏,而不会由于外部阻塞器降低其适配速率。解决方案:可以应用发射机噪声消除 在逐个信道的基础上接收在接收器处接收的输入射频信号的有效信道。 可以在预定信号频带中为每个有源信道提供噪声消除滤波器。 在每个活动通道基础上而不是整个接收频带上应用噪声消除可以大大降低滤波器要求和滤波器系数或抽头的数量以节省功率并降低制造成本。 还提供信道化发射机噪声消除器,多发射机 - 接收机交叉耦合消除器,以及混合全信号频带和信道化发射机噪声消除器。
    • 8. 发明专利
    • All digital transmitter noise correction
    • 所有数字发射机噪声校正
    • JP2014176097A
    • 2014-09-22
    • JP2014047252
    • 2014-03-11
    • Analog Devices Technologyアナログ・デヴァイシズ・テクノロジー
    • PATRICK PRATTPEADAR ANTONY FORBES
    • H04B1/04H04B1/40
    • H04B1/0475H04B1/10H04B1/123H04B1/525H04L5/14H04L5/1423H04L5/1461
    • PROBLEM TO BE SOLVED: To provide a circuit and a method in which an all digital model of nonlinear transmitter signal distortion in signals received at a receiver of a transmitter-receiver may be used to estimate distortion, and the estimated distortion may then be cancelled from the received signals to improve signal quality of the received signal.SOLUTION: A digital nonlinear model may be part of an estimation circuit that estimates nonlinear distortion terms by applying a formula or transformation to a digitized version of transmission signals at a transmitter of the transmitter-receiver. A mixer may be used to shift a frequency of the estimated nonlinear terms away from a transmitter frequency so that the nonlinear terms can later be subtracted from the incoming signal received at the receiver at a receiver frequency. A circuit and a method are provided.
    • 要解决的问题:提供一种电路和方法,其中可以使用在发射机 - 接收机的接收机处接收的信号中的非线性发射机信号失真的全数字模型来估计失真,并且然后可以从 接收信号以改善接收信号的信号质量。解决方案:数字非线性模型可以是估计电路的一部分,该估计电路通过在发射机的发射机处对传输信号的数字化版本应用公式或变换来估计非线性失真项, 接收器。 可以使用混频器将估计的非线性项的频率偏离发射机频率,使得可以在接收机频率处从接收机接收的输入信号中减去非线性项。 提供电路和方法。
    • 9. 发明专利
    • Baseband digital pre-distortion architecture
    • 基带数字预失真架构
    • JP2014179987A
    • 2014-09-25
    • JP2014049840
    • 2014-03-13
    • Analog Devices Technologyアナログ・デヴァイシズ・テクノロジー
    • DON CHEN
    • H03F1/32H03F3/24
    • H04L27/367H03F1/3247
    • PROBLEM TO BE SOLVED: To provide an improved power amplifier that compensates for baseband nonlinearity.SOLUTION: An amplifier may include a pre-distorter for receiving an input signal to generate a pre-distortion signal, a first converter for receiving the pre-distortion signal to generate a pre-amplified signal, a power amplifier for receiving the pre-amplified signal to generate an output signal on the basis of the pre-amplified signal and the input signal, and a second converter for sampling the output signal to generate a feedback signal. The pre-distorter may separately and independently generate a pre-distortion signal component for an in-phase input signal and a pre-distortion signal component for a quadrature input signal.
    • 要解决的问题:提供一种改进的功率放大器,其补偿基带非线性。解决方案:放大器可以包括用于接收输入信号以产生预失真信号的预失真器,用于接收预失真信号的第一转换器 以产生预放大的信号;功率放大器,用于接收预放大的信号,以根据预放大的信号和输入信号产生输出信号;以及第二转换器,用于对输出信号进行采样以产生反馈 信号。 预失真器可以单独和独立地产生用于正相输入信号的同相输入信号和预失真信号分量的预失真信号分量。