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    • 1. 发明授权
    • Analog power amplifier predistortion methods and apparatus
    • 模拟功率放大器预失真方法和装置
    • US08693962B2
    • 2014-04-08
    • US12203064
    • 2008-09-02
    • Dongtai LiuDali YangJames Anderson
    • Dongtai LiuDali YangJames Anderson
    • H04B1/04
    • H04B1/0475H03F1/3247H03F3/19H03F3/21H03F3/24H03F2200/451H03F2200/57H03F2201/3215H03F2201/3233H04B2001/0425Y02D70/00
    • An embodiment of the invention is a predistortion approach to linearize a power amplifier by using one or more analog multiplier(s) and a DSP-based processor. For the analog embodiment, the inherent nature of the analog circuitries allows digital predistortion processing structured directly at the RF band, and enables a single power amplifier to support multi-modulation schemes, multi-carriers and multi-channels. As a result, the predistortion architecture is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems. The wireless system performance can be improved and upgraded just by using the new PA module rather than change or rebuild new subsystem in existing base station. The analog embodiment can also mix and match its analog multipliers with other analog components such as phase splitters, phase shifters, attenuators, filters, couplers, mixers, low-noise amplifiers, buffers, envelope detectors, and etc., to provide additional features.
    • 本发明的一个实施例是通过使用一个或多个模拟乘法器和基于DSP的处理器对功率放大器进行线性化的预失真方法。 对于模拟实施例,模拟电路的固有特性允许直接在RF频带处构成的数字预失真处理,并且使单个功率放大器能够支持多调制方案,多载波和多信道。 因此,预失真架构特别适用于诸如基站,中继器和室内信号覆盖系统之类的无线传输系统。 无线系统性能可以通过使用新的PA模块来改进和升级,而不是改变或重建现有基站中的新子系统。 模拟实施例还可以将其模拟乘法器与诸如相位分离器,移相器,衰减器,滤波器,耦合器,混频器,低噪声放大器,缓冲器,包络检测器等的其它模拟组件混合并匹配,以提供附加特征。
    • 2. 发明授权
    • Power amplifier predistortion methods and apparatus using envelope and phase detector
    • 功率放大器预失真方法和使用包络和相位检测器的装置
    • US08224266B2
    • 2012-07-17
    • US12203076
    • 2008-09-02
    • Dongtai LiuDali YangJames Anderson
    • Dongtai LiuDali YangJames Anderson
    • H04B1/04
    • H03F3/24H03F1/3241H03F1/3247H03F1/3282H03F1/3294H03F2200/102H03F2200/192H03F2200/204H03F2200/321H03F2200/336H03F2201/3233H04B2001/0425
    • An embodiment of the invention is a predistortion approach to linearize a power amplifier without frequency conversion of the RF signals by using envelope and phase detectors to detect the error to be corrected, and then one or more analog multiplier(s) and a DSP-based processor. For the analog embodiment, the inherent nature of the analog circuitries allows digital predistortion processing structured directly at the RF band, and enables a single power amplifier to support multi-modulation schemes, multi-carriers and multi-channels. As a result, the predistortion architecture is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems. The wireless system performance can be improved and upgraded just by using the new PA module rather than change or rebuild new subsystem in existing base station. The analog embodiment can also mix and match its analog multipliers with other analog components such as phase splitters, phase shifters, attenuators, filters, couplers, mixers, low-noise amplifiers, buffers, envelope detectors, and etc., to provide additional features.
    • 本发明的一个实施例是通过使用包络和相位检测器来检测待校正的误差,然后一个或多个模拟乘法器和基于DSP的模拟乘法器来对功率放大器进行线性化而不对RF信号进行频率转换的预失真方法 处理器。 对于模拟实施例,模拟电路的固有特性允许直接在RF频带处构成的数字预失真处理,并且使单个功率放大器能够支持多调制方案,多载波和多信道。 因此,预失真架构特别适用于诸如基站,中继器和室内信号覆盖系统之类的无线传输系统。 无线系统性能可以通过使用新的PA模块来改进和升级,而不是改变或重建现有基站中的新子系统。 模拟实施例还可以将其模拟乘法器与诸如相位分离器,移相器,衰减器,滤波器,耦合器,混频器,低噪声放大器,缓冲器,包络检测器等的其它模拟组件混合并匹配,以提供附加特征。