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    Method And System For Crest Factor Reduction
    2.
    发明申请
    Method And System For Crest Factor Reduction 有权
    波峰因子减少的方法和系统

    公开(公告)号：US20160248458A1

    公开(公告)日：2016-08-25

    申请号：US15140599

    申请日：2016-04-28

    Applicant: Maxlinear, Inc.

    Inventor： Ramesh Sridhar ,  Timothy Gallagher ,  Shantha Murthy Prem Swaroop ,  Ali Shahed Hagh Gadam

    IPC: H04B1/04 ,  H03G3/30 ,  H03F3/213 ,  H03F1/32 ,  H03F3/195

    CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/213 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3215 ,  H03G3/3042 ,  H04B2001/0425 ,  H04B2001/045

    Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform to be amplified by a programmable gain amplifier (PGA); generating a distortion signal utilizing a PGA model that predicts an output signal of the PGA based on the original waveform; generating an error signal by subtracting out the original waveform from the distortion signal; filtering the generated error signal; generating a conditioned waveform with crest factor reduced from that of the original waveform by adding the filtered error signal to the original waveform; and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The generating of the conditioned waveform may be iterated. The distortion signal may be generated based on a predistortion model. A signal may be fed back from an output of the PGA to the predistortion model, which may be dynamically configured.

    Abstract translation: 用于波峰因数降低的方法和系统可以包括产生要由可编程增益放大器（PGA）放大的原始波形; 使用预测基于原始波形的PGA的输出信号的PGA模型产生失真信号; 通过从失真信号中减去原始波形来产生误差信号; 过滤产生的误差信号; 通过将滤波后的误差信号加到原始波形，产生波形因数从原始波形的峰值因数减小的条件波形; 并放大调节波形。 可以基于光谱掩模要求来减小原始波形的波峰因数。 可以重复生成条件波形。 可以基于预失真模型来生成失真信号。 信号可以从PGA的输出反馈到预失真模型，该预失真模型可以被动态配置。

    Method and system for crest factor reduction
    4.
    发明授权
    Method and system for crest factor reduction 有权
    波峰因数降低的方法和系统

    公开(公告)号：US09331725B2

    公开(公告)日：2016-05-03

    申请号：US14589801

    申请日：2015-01-05

    Applicant: Maxlinear, Inc.

    Inventor： Ramesh Sridhar ,  Timothy Gallagher ,  Ali Shahed hagh Ghadam ,  Shantha Murthy Prem Swaroop

    IPC: H04L25/03 ,  H04B1/04 ,  H03G3/30 ,  H03F1/32 ,  H03F3/195 ,  H03F3/24

    CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/213 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3215 ,  H03G3/3042 ,  H04B2001/0425 ,  H04B2001/045

    Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform, generating a distortion signal by reducing a crest factor of the original waveform, generating an error signal by subtracting out the original waveform from the distortion signal, generating a conditioned waveform by adding the error signal to the original waveform, and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The crest factor of the original waveform may be reduced using a limiter. The power amplifier may comprise a programmable gain amplifier (PGA). The distortion signal may be generated based on a PGA model and/or a predistortion model. A signal from an output of the PA may be fed back to the PGA model. The PGA model may be dynamically configured. The crest factor of the original waveform may be reduced in an analog domain and/or a digital domain. The error signal may be filtered utilizing a distortion shaping filter.

    Abstract translation: 用于波峰因数降低的方法和系统可以包括产生原始波形，通过减小原始波形的波峰因数产生失真信号，通过从失真信号中减去原始波形产生误差信号，通过将 误差信号到原始波形，并放大调节波形。 可以基于光谱掩模要求来减小原始波形的波峰因数。 原始波形的波峰因数可以使用限幅器来减小。 功率放大器可以包括可编程增益放大器（PGA）。 可以基于PGA模型和/或预失真模型来生成失真信号。 来自PA的输出的信号可以被反馈到PGA模型。 PGA模型可以动态配置。 在模拟域和/或数字域中，原始波形的波峰因数可能会降低。 可以使用失真整形滤波器对误差信号进行滤波。

    METHOD AND SYSTEM FOR CREST FACTOR REDUCTION
    6.
    发明申请
    METHOD AND SYSTEM FOR CREST FACTOR REDUCTION 有权
    冲击因子减少的方法和系统

    公开(公告)号：US20150194932A1

    公开(公告)日：2015-07-09

    申请号：US14589801

    申请日：2015-01-05

    Applicant: Maxlinear, Inc.

    Inventor： Ramesh Sridhar ,  Timothy Gallagher ,  Ali Shahed hagh Ghadam ,  Shantha Murthy Prem Swaroop

    IPC: H03F1/02 ,  H04B1/04 ,  H03G3/30 ,  H03F3/19 ,  H03F3/21

    CPC classification number: H04B1/0475 ,  H03F1/02 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/213 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3215 ,  H03G3/3042 ,  H04B2001/0425 ,  H04B2001/045

    Abstract: Methods and systems for crest factor reduction may comprise generating an original waveform, generating a distortion signal by reducing a crest factor of the original waveform, generating an error signal by subtracting out the original waveform from the distortion signal, generating a conditioned waveform by adding the error signal to the original waveform, and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The crest factor of the original waveform may be reduced using a limiter. The power amplifier may comprise a programmable gain amplifier (PGA). The distortion signal may be generated based on a PGA model and/or a predistortion model. A signal from an output of the PA may be fed back to the PGA model. The PGA model may be dynamically configured. The crest factor of the original waveform may be reduced in an analog domain and/or a digital domain. The error signal may be filtered utilizing a distortion shaping filter.

    Abstract translation: 用于波峰因数降低的方法和系统可以包括产生原始波形，通过减小原始波形的波峰因数产生失真信号，通过从失真信号中减去原始波形产生误差信号，通过将 误差信号到原始波形，并放大调节波形。 可以基于光谱掩模要求来减小原始波形的波峰因数。 原始波形的波峰因数可以使用限幅器来减小。 功率放大器可以包括可编程增益放大器（PGA）。 可以基于PGA模型和/或预失真模型来生成失真信号。 来自PA的输出的信号可以被反馈到PGA模型。 可以动态配置PGA模型。 在模拟域和/或数字域中，原始波形的波峰因数可能会降低。 可以使用失真整形滤波器对误差信号进行滤波。

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