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公开(公告)号：US09705541B2
公开(公告)日：2017-07-11
申请号：US15140599
申请日：2016-04-28
Applicant: Maxlinear, Inc.
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.
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公开(公告)号：US20170310347A1
公开(公告)日：2017-10-26
申请号：US15646773
申请日：2017-07-11
Applicant: Maxlinear, Inc.
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, and generating a conditioned waveform by adding the error signal to the original 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.
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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.
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。
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