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公开(公告)号：US07623833B2
公开(公告)日：2009-11-24
申请号：US11403304
申请日：2006-04-13
IPC分类号： H04B1/04
CPC分类号： H04B1/0483
摘要： Systems and methods are provided for generating dual outputs in a digital exciter system. A first signal path produces one of a frequency modulated audio signal, a digital information signal, and a signal comprising both frequency modulated audio and digital information. A second signal path produces one of a frequency modulated audio signal, a digital information signal, and a signal comprising both frequency modulated audio and digital information. A main exciter output provides one of the signal produced at the first signal path and the signal produced at the second signal path to an associated first signal destination. An auxiliary exciter output provides one of the signal produced at the first signal path and the signal produced at the auxiliary signal path to an associated second signal destination.
摘要翻译： 提供了用于在数字激励器系统中产生双输出的系统和方法。 第一信号路径产生频率调制音频信号，数字信息信号和包括调频音频和数字信息的信号之一。 第二信号路径产生频率调制音频信号，数字信息信号和包括调频音频和数字信息的信号之一。 主激励器输出提供在第一信号路径处产生的信号和在第二信号路径处产生的信号到相关联的第一信号目的地之一。 辅助激励器输出提供在第一信号路径处产生的信号和在辅助信号路径处产生的信号到相关联的第二信号目的地之一。
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公开(公告)号：US07983358B2
公开(公告)日：2011-07-19
申请号：US12229430
申请日：2008-08-22
IPC分类号： H04L25/49
CPC分类号： H04B1/66
摘要： Systems and methods are provided for providing a hybrid signal having a reduced crest factor. A digital signal is generated that assumes one of a plurality of vector states at discrete sampling times, with each of the plurality of vector states having an associated phase. An analog signal is monitored to determine when a phase of the analog signal is aligned with the phase of a vector state assumed by the digital signal. A crest factor reduction is applied to the digital signal if the digital signal assumes a vector state having an associated phase aligned with the phase of the analog signal to provide a compressed digital signal. The compressed digital signal and the analog signal are combined to provide the hybrid signal. The analog signal is not altered prior to being combined with the compressed digital signal.
摘要翻译： 提供了用于提供具有降低的波峰因数的混合信号的系统和方法。 产生数字信号，其以离散采样时间采取多个向量状态中的一个，其中多个向量状态中的每一个具有相关联的相位。 监视模拟信号以确定模拟信号的相位何时与由数字信号假设的矢量状态的相位对准。 如果数字信号呈现具有与模拟信号的相位对准的相关相位的矢量状态以提供压缩的数字信号，则波形因数减小被应用于数字信号。 压缩的数字信号和模拟信号被组合以提供混合信号。 在与压缩数字信号组合之前，模拟信号不被改变。
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公开(公告)号：US07391261B2
公开(公告)日：2008-06-24
申请号：US11305649
申请日：2005-12-16
IPC分类号： H03G3/20
CPC分类号： H03G3/3042 , H03F1/0222 , H03F1/3247 , H03F2200/102 , H03G3/004
摘要： Systems and methods are provided for amplifying a composite input signal, comprising a drive signal and an envelope signal, at a power amplifier. A secondary modulation, representing a portion of the composite input signal falling outside of a frequency band associated with the envelope signal, is produced for the drive signal. The secondary modulation is applied to the drive signal. The drive signal is amplified at the power amplifier to produce an amplified signal. At least a portion of the envelope signal is employed to drive a supply terminal of the power amplifier.
摘要翻译： 系统和方法被提供用于在功率放大器处放大包括驱动信号和包络信号的复合输入信号。 对于驱动信号产生表示复合输入信号的落在与包络信号相关的频带之外的部分的二次调制。 二次调制被应用于驱动信号。 驱动信号在功率放大器被放大以产生放大的信号。 使用包络信号的至少一部分来驱动功率放大器的供电端子。
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公开(公告)号：US20080317163A1
公开(公告)日：2008-12-25
申请号：US12229430
申请日：2008-08-22
IPC分类号： H04L27/00
CPC分类号： H04B1/66
摘要： Systems and methods are provided for providing a hybrid signal having a reduced crest factor. A digital signal is generated that assumes one of a plurality of vector states at discrete sampling times, with each of the plurality of vector states having an associated phase. An analog signal is monitored to determine when a phase of the analog signal is aligned with the phase of a vector state assumed by the digital signal. A crest factor reduction is applied to the digital signal if the digital signal assumes a vector state having an associated phase aligned with the phase of the analog signal to provide a compressed digital signal. The compressed digital signal and the analog signal are combined to provide the hybrid signal. The analog signal is not altered prior to being combined with the compressed digital signal.
摘要翻译： 提供了用于提供具有降低的波峰因数的混合信号的系统和方法。 产生数字信号，其以离散采样时间采取多个向量状态中的一个，其中多个向量状态中的每一个具有相关联的相位。 监视模拟信号以确定模拟信号的相位何时与由数字信号假设的矢量状态的相位对准。 如果数字信号呈现具有与模拟信号的相位对准的相关相位的矢量状态以提供压缩的数字信号，则波形因数减小被应用于数字信号。 压缩的数字信号和模拟信号被组合以提供混合信号。 在与压缩数字信号组合之前，模拟信号不被改变。
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公开(公告)号：US07248110B2
公开(公告)日：2007-07-24
申请号：US11294742
申请日：2005-12-06
IPC分类号： H03F3/68
CPC分类号： H03F3/24 , H03F1/0288 , H03F2200/255
摘要： Systems and methods are provided for efficient amplification of a signal utilizing a modified Doherty amplifier system. A modified Doherty amplifier system includes a nonlinear main amplifier and a nonlinear auxiliary amplifier. An impedance-inverting network separates the main amplifier from an associated load. A second quarter wave transmission line separates the auxiliary amplifier from an associated signal source. The signal source has an associated minimum signal power, such that the signal power never drops below a predetermined percentage of a peak signal power.
摘要翻译： 提供了系统和方法，用于利用改进的Doherty放大器系统来有效地放大信号。 改进的Doherty放大器系统包括非线性主放大器和非线性辅助放大器。 阻抗反相网络将主放大器与相关负载分开。 第二个四分之一波长的传输线将辅助放大器与相关的信号源分开。 信号源具有相关联的最小信号功率，使得信号功率不会降低到峰值信号功率的预定百分比以下。
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