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公开(公告)号：US09768987B2
公开(公告)日：2017-09-19
申请号：US14595896
申请日：2015-01-13
Applicant: MaxLinear, Inc.
Inventor： Sridhar Ramesh , Timothy Gallagher , Ali Shahed hagh ghadam
CPC classification number: H04L25/03343 , H03F1/3211 , H03F1/3241 , H04B15/00 , H04L27/367
Abstract: Systems and methods are provided for dynamic calibration of pre-distortion modification in transmitters. The pre-distortion modification may be applied during processing of an input signal for transmission, and feedback data, relating to the transmitter and/or processing performed after application of the pre-distortion modification in the transmitter, may be obtained. Adjustments to the pre-distortion modification may be determined based on the feedback data, and the adjustments to the pre-distortion modification may be applied in loop-back manner, thus enabling adjustment of pre-distortion modification dynamically based on real-time and current data. The pre-distortion modification may comprise modifying one or more signal characteristics, such as phase, frequency, and/or amplitude. Determining and/or applying the adjustments to the pre-distortion modification may be done periodically, based on one or more particular events, or conditionally.
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公开(公告)号：US20200021469A1
公开(公告)日：2020-01-16
申请号：US16584504
申请日：2019-09-26
Applicant: MaxLinear, Inc.
Inventor： Sridhar Ramesh , Timothy Gallagher , Ali Shahed hagh ghadam
Abstract: Systems and methods are provided for dynamic calibration of pre-distortion modification in transmitters. The pre-distortion modification may be applied during processing of an input signal for transmission, and feedback data, relating to the transmitter and/or processing performed after application of the pre-distortion modification in the transmitter, may be obtained. Adjustments to the pre-distortion modification may be determined based on the feedback data, and the adjustments to the pre-distortion modification may be applied in loop-back manner, thus enabling adjustment of pre-distortion modification dynamically based on real-time and current data. The pre-distortion modification may comprise modifying one or more signal characteristics, such as phase, frequency, and/or amplitude. Determining and/or applying the adjustments to the pre-distortion modification may be done periodically, based on one or more particular events, or conditionally.
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Patent Agency Ranking
公开(公告)号：US10084494B2
公开(公告)日：2018-09-25
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：US10200219B2
公开(公告)日：2019-02-05
申请号：US15707521
申请日：2017-09-18
Applicant: MaxLinear, Inc.
Inventor： Sridhar Ramesh , Timothy Gallagher , Ali Shahed hagh ghadam
Abstract: Systems and methods are provided for adaptive control of pre-distortion during signal transmissions. While applying pre-distortion during processing of an input signal for transmission, feedback data may be generated based on a plurality of feedback signals, and adjustments to the pre-distortion may be applied to the pre-distortion based on the feedback data. Each of feedback signals corresponds to a particular processing stage performed during the processing of the input signal. Generating the feedback data comprises applying adjustments to the plurality of feedback signals based on a type and/or a source of at least one feedback signal, with the adjustments comprising one or more of: applying a gain to one of the plurality of feedback signals; applying a delay to one of the plurality of feedback signals; and modifying a first one of the plurality of feedback signals based on a second one of the plurality of feedback signals.
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公开(公告)号：US20190028128A1
公开(公告)日：2019-01-24
申请号：US16137268
申请日：2018-09-20
Applicant: Maxlinear, Inc.
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：US20180102925A1
公开(公告)日：2018-04-12
申请号：US15707521
申请日：2017-09-18
Applicant: MaxLinear, Inc.
Inventor： Sridhar Ramesh , Timothy Gallagher , Ali Shahed hagh ghadam
IPC: H04L25/03
CPC classification number: H04L25/03343 , H03F1/3211 , H03F1/3241 , H04B15/00 , H04L27/367
Abstract: Systems and methods are provided for adaptive control of pre-distortion during signal transmissions. While applying pre-distortion during processing of an input signal for transmission, feedback data may be generated based on a plurality of feedback signals, and adjustments to the pre-distortion may be applied to the pre-distortion based on the feedback data. Each of feedback signals corresponds to a particular processing stage performed during the processing of the input signal. Generating the feedback data comprises applying adjustments to the plurality of feedback signals based on a type and/or a source of at least one feedback signal, with the adjustments comprising one or more of: applying a gain to one of the plurality of feedback signals; applying a delay to one of the plurality of feedback signals; and modifying a first one of the plurality of feedback signals based on a second one of the plurality of feedback signals.
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公开(公告)号：US20150200795A1
公开(公告)日：2015-07-16
申请号：US14595896
申请日：2015-01-13
Applicant: MaxLinear, Inc.
Inventor： Sridhar Ramesh , Timothy Gallagher , Ali Shahed hagh ghadam
IPC: H04L25/08
CPC classification number: H04L25/03343 , H03F1/3211 , H03F1/3241 , H04B15/00 , H04L27/367
Abstract: Systems and methods are provided for dynamic calibration of pre-distortion modification in transmitters. The pre-distortion modification may be applied during processing of an input signal for transmission, and feedback data, relating to the transmitter and/or processing performed after application of the pre-distortion modification in the transmitter, may be obtained. Adjustments to the pre-distortion modification may be determined based on the feedback data, and the adjustments to the pre-distortion modification may be applied in loop-back manner, thus enabling adjustment of pre-distortion modification dynamically based on real-time and current data. The pre-distortion modification may comprise modifying one or more signal characteristics, such as phase, frequency, and/or amplitude. Determining and/or applying the adjustments to the pre-distortion modification may be done periodically, based on one or more particular events, or conditionally.
Abstract translation: 提供了系统和方法用于动态校准发射机中的失真前变形。 可以在处理用于传输的输入信号的处理期间应用预失真修改，并且可以获得与在发射机中应用预失真修改之后执行的发射机和/或处理相关的反馈数据。 可以基于反馈数据来确定预失真修改的调整，并且可以以环回方式应用对失真前修改的调整，从而可以基于实时和当前动态调整预失真修改 数据。 预失真修改可以包括修改一个或多个信号特性，例如相位，频率和/或幅度。 可以基于一个或多个特定事件或有条件地周期性地进行确定和/或应用对失真前修改的调整。
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