Linearization of RF power amplifiers using an adaptive subband predistorter
    1.
    发明授权
    Linearization of RF power amplifiers using an adaptive subband predistorter 有权
    使用自适应子带预失真器对RF功率放大器进行线性化

    公开(公告)号:US08019015B2

    公开(公告)日:2011-09-13

    申请号:US11678847

    申请日:2007-02-26

    IPC分类号: H04K1/02 H04L25/03 H04L25/49

    摘要: Predistorting an input signal prior to amplification in an RF power amplifier (206) includes isolating a plurality sub-band signals, each representing a portion of the input signal s(t). The method includes independently modifying an amplitude and a phase of each of the plurality of sub-band signals. The modification of the amplitude and/or phase is performed using a set of signal weighting parameters (weights) w and W, controlling linear and nonlinear modifications respectively, which are determined in an adaptive process by an adaptive controller (224). After modification, each of the sub-bands are summed together to obtain a predistorted input signal for an RF power amplifier (206).

    摘要翻译: 在RF功率放大器(206)中放大之前预失真输入信号包括隔离多个子带信号,每个子带信号表示输入信号s(t)的一部分。 该方法包括独立地修改多个子带信号中的每一个的振幅和相位。 使用一组信号加权参数(权重)w和W来执行幅度和/或相位的修改,分别控制在自适应控制器(224)的自适应处理中确定的线性和非线性修改。 在修改之后,将每个子带相加在一起以获得用于RF功率放大器(206)的预失真输入信号。

    Feedforward linearization of RF power amplifiers
    2.
    发明授权
    Feedforward linearization of RF power amplifiers 有权
    射频功率放大器的前馈线性化

    公开(公告)号:US07642850B2

    公开(公告)日:2010-01-05

    申请号:US12061013

    申请日:2008-04-02

    IPC分类号: H03F1/26

    CPC分类号: H03F1/3229

    摘要: RF amplifier system (200) incorporating feedforward linearization. The system includes a digital waveform source (202) generating digital data s(t) representative of at least one analog signal. The system also includes a feedforward linearization circuit for reducing a distortion of an RF power amplifier (212). The feedforward linearization circuit includes a differential amplifier (230) arranged for generating an error signal. The error signal is determined based on a difference between the distorted RF output signal and an analog RF reference signal (229) generated from the digital data.

    摘要翻译: RF放大器系统(200)包含前馈线性化。 该系统包括产生代表至少一个模拟信号的数字数据s(t)的数字波形源(202)。 该系统还包括用于减少RF功率放大器(212)的失真的前馈线性化电路。 前馈线性化电路包括布置成用于产生误差信号的差分放大器(230)。 基于从数字数据产生的失真的RF输出信号和模拟RF参考信号(229)之间的差异来确定误差信号。

    FEEDFORWARD LINEARIZATION OF RF POWER AMPLIFIERS
    3.
    发明申请
    FEEDFORWARD LINEARIZATION OF RF POWER AMPLIFIERS 有权
    射频功率放大器的前馈线性化

    公开(公告)号:US20090251211A1

    公开(公告)日:2009-10-08

    申请号:US12061013

    申请日:2008-04-02

    IPC分类号: H03F1/26

    CPC分类号: H03F1/3229

    摘要: RF amplifier system (200) incorporating feedforward linearization. The system includes a digital waveform source (202) generating digital data s(t) representative of at least one analog signal. The system also includes a feedforward linearization circuit for reducing a distortion of an RF power amplifier (212). The feedforward linearization circuit includes a differential amplifier (230) arranged for generating an error signal. The error signal is determined based on a difference between the distorted RF output signal and an analog RF reference signal (229) generated from the digital data.

    摘要翻译: RF放大器系统(200)包含前馈线性化。 该系统包括产生代表至少一个模拟信号的数字数据s(t)的数字波形源(202)。 该系统还包括用于减少RF功率放大器(212)的失真的前馈线性化电路。 前馈线性化电路包括布置成用于产生误差信号的差分放大器(230)。 基于从数字数据产生的失真的RF输出信号和模拟RF参考信号(229)之间的差异来确定误差信号。

    Active receiver detection and ranging
    4.
    发明授权
    Active receiver detection and ranging 失效
    有源接收机检测和测距

    公开(公告)号:US07676205B2

    公开(公告)日:2010-03-09

    申请号:US11532642

    申请日:2006-09-18

    IPC分类号: H04B17/00 G01S3/02

    CPC分类号: H04B17/318 H04B1/56 H04H60/51

    摘要: Method (500) and system (402) for actively detecting and determining a range of a remotely located radio receiver (100). The invention also provides a method and system to determine whether a remote receiver (100) is receiving a transmitted signal (418) and the minimum necessary transmitter power required to establish a communication link to the receiver (100). Finally, the invention also provides a method and system to resolve directional ambiguities due to multipath.

    摘要翻译: 用于主动地检测和确定远程位置的无线电接收机(100)的范围的方法(500)和系统(402)。 本发明还提供一种方法和系统,用于确定远程接收机(100)是否正在接收发射信号(418)和建立到接收机(100)的通信链路所需的最小必需发射机功率。 最后,本发明还提供了解决由于多路径导致的定向模糊性的方法和系统。

    Active Receiver Detection and Ranging
    5.
    发明申请
    Active Receiver Detection and Ranging 失效
    主动接收机检测和测距

    公开(公告)号:US20080070532A1

    公开(公告)日:2008-03-20

    申请号:US11532642

    申请日:2006-09-18

    IPC分类号: H04B17/00

    CPC分类号: H04B17/318 H04B1/56 H04H60/51

    摘要: Method (500) and system (402) for actively detecting and determining a range of a remotely located radio receiver (100). The invention also provides a method and system to determine whether a remote receiver (100) is receiving a transmitted signal (418) and the minimum necessary transmitter power required to establish a communication link to the receiver (100). Finally, the invention also provides a method and system to resolve directional ambiguities due to multipath.

    摘要翻译: 用于主动地检测和确定远程位置的无线电接收机(100)的范围的方法(500)和系统(402)。 本发明还提供一种方法和系统,用于确定远程接收机(100)是否正在接收发射信号(418)和建立到接收机(100)的通信链路所需的最小必需发射机功率。 最后,本发明还提供了解决由于多路径导致的定向模糊性的方法和系统。