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公开(公告)号：US20140109163A1
公开(公告)日：2014-04-17
申请号：US14107524
申请日：2013-12-16
Applicant: MaxLinear, Inc.
Inventor： Anand ANANDAKUMAR , Sridhar Ramesh
IPC: H04N21/43 , H04N21/44 , H04N21/434
CPC classification number: H04N21/4305 , H04L27/2656 , H04L27/2657 , H04L27/2665 , H04L27/2671 , H04L27/2675 , H04L27/2676 , H04L27/2685 , H04L27/2695 , H04N21/4343 , H04N21/44016
Abstract: A method and an apparatus for achieving fast resynchronization of received signals in a time slice in DVB-T/H systems. When the clock drift is low, the location of the symbol window can be decided based on a previous time slice. When the clock drift is high and when there are large delay spreads, the location of the symbol window can be decided based on the detected scattered pilot positions. The placement of the symbol window can further be enhanced through processing of the received TPS bits.
Abstract translation: 一种用于在DVB-T / H系统的时间片中实现接收信号的快速重新同步的方法和装置。 当时钟漂移低时，可以基于先前的时间片来确定符号窗口的位置。 当时钟漂移很高时，并且当存在大的延迟扩展时，可以基于检测到的分散导频位置来确定符号窗口的位置。 可以通过处理所接收的TPS位来进一步增强符号窗口的放置。
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公开(公告)号：US20240187154A1
公开(公告)日：2024-06-06
申请号：US18440880
申请日：2024-02-13
Applicant: MAXLINEAR, INC.
Inventor： Sridhar Ramesh , Curtis Ling , Xing Tan
IPC: H04L5/00
CPC classification number: H04L5/003
Abstract: Methods and systems are provided for using frequency spreading during communications, in particular communications in which multiple carriers (or subcarriers) are used. The frequency spreading may comprise generating a plurality of spreading data vectors based on transmit data, such as by application of a spreading matrix to portions of the transmit data. Each spreading data vector may comprise a plurality of elements, for assignment to the multiple subcarriers. The receive-side device may then apply frequency de-spreading, to obtain the original transmit data. The frequency de-spreading may comprise use of the same spreading matrix on data extracted from received signals, which (the data) may correspond to the plurality of spreading data vectors.
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公开(公告)号：US11343032B2
公开(公告)日：2022-05-24
申请号：US14157090
申请日：2014-01-16
Applicant: MaxLInear, Inc.
Inventor： Sridhar Ramesh , Curtis Ling , Xing Tan
IPC: H04L5/00
Abstract: Methods and systems are provided for using frequency spreading during communications, in particular communications in which multiple carriers (or subcarriers) are used. The frequency spreading may comprise generating a plurality of spreading data vectors based on transmit data, such as by application of a spreading matrix to portions of the transmit data. Each spreading data vector may comprise a plurality of elements, for assignment to the multiple subcarriers. The receive-side device may then apply frequency de-spreading, to obtain the original transmit data. The frequency de-spreading may comprise use of the same spreading matrix on data extracted from received signals, which (the data) may correspond to the plurality of spreading data vectors.
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公开(公告)号：US10700736B2
公开(公告)日：2020-06-30
申请号：US15938937
申请日：2018-03-28
Applicant: MaxLinear, Inc.
Inventor： Sridhar Ramesh , Kenneth Scott Walley
Abstract: Systems and methods are provided for full duplex DOCSIS cable modem echo cancellation with training. During reception of downstream signals, echo effects on downstream signals may be determined, with at least some of the echo effects corresponding to concurrently transmitted upstream signals. Echo cancellation corrections may be determined based on the determined echo effects, and the echo cancellation corrections may be applied during processing of the downstream signals. The echo cancellation corrections may include one or both of ACI (adjacent channel interference) cancellation corrections and ALI (adjacent leakage interference) cancellation correction. The echo cancellation may include or be based on preforming echo cancellation training, during active communication and based on one or both of the downstream signals and the upstream signals.
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公开(公告)号：US10432202B2
公开(公告)日：2019-10-01
申请号：US15707788
申请日：2017-09-18
Applicant: MaxLinear, Inc.
Inventor： Sridhar Ramesh , Subramanian Anantharaman , Harish Maller
Abstract: Systems and methods are provided for detection and compensation of frequency drifts. Frequency related information may be determined for each of one or more channels in an input signal, and a frequency drift may be determined based on the determined frequency related information of the one or more channels. Frequency related adjustments may be determined based on the frequency drift, and the frequency related adjustments may be applied to different circuits used during one or more of: receiving of the input signal, processing of the input signal, processing of an intermediate signal generated based on the processing of the input signal, and generating of an output signal corresponding to the input signal. Applying the frequency related adjustments may be configured to meet one or more criteria.
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Patent Agency Ranking
公开(公告)号：US10277469B2
公开(公告)日：2019-04-30
申请号：US15420530
申请日：2017-01-31
Applicant: Maxlinear, Inc.
Inventor： Sridhar Ramesh , Timothy Leo Gallagher , Curtis Ling
Abstract: A network device comprising: a first connector for connecting to an external network from which data may be communicated using a first frequency band in accordance with a first communications protocol; a second connector for connecting to an on-premises network; and circuitry residing in a signal path between said first connector and said second connector. The circuitry may be operable to: permit a first portion of the first frequency band to pass from the first connector to the second connector; block a second portion of said first frequency band from passing from the first connector to the second connector; and communicate, via the second connector, signals that are normally communicated in frequency ranges not including the first frequency band, into the on-premises network using the first frequency band. The signals may include packets formatted in accordance with Multimedia over Coax Alliance (MoCA) standards.
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57.发明申请公开(公告)号：US20190081661A1
公开(公告)日：2019-03-14
申请号：US16128213
申请日：2018-09-11
Applicant: MaxLinear, Inc.
Inventor： Steven John Krapp , Sridhar Ramesh
Abstract: Systems and methods are provided for utilizing low gain low noise signal amplification and ideal taps in coaxial networks. An ideal tap configured for use in coaxial networks may have a plurality of ports, one or more processing circuits configured for handling reception and transmission of signals communicated via the tap, and one or more echo cancellation circuits configured for providing echo cancellation during operations of the tap. The processing circuits are configured based on particular predefined tap performance criteria. The tap performance criteria may relate to one or more of port-to-port isolation, return loss, port-to-port gain, and up-tilt. The echo cancellation circuits may be configurable for providing the echo cancellation based on the tap performance criteria. The echo cancellation circuits may include an echo cancellation control circuit for controlling echo cancellation functions and/or operations. The echo cancellation circuits may include dedicated per-port echo cancellation circuits.
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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：US20180351268A1
公开(公告)日：2018-12-06
申请号：US16000491
申请日：2018-06-05
Applicant: MaxLinear, Inc.
Inventor： Steven John Krapp , Sridhar Ramesh
Abstract: Systems and methods are provided for utilizing ideal taps in coaxial networks. An ideal tap may have a plurality of ports that include at least an input port configured for receiving downstream (DS) signals from and transmitting upstream (US) signals to nodes upstream from the tap within the coaxial network; an output port configured for transmitting downstream (DS) signals to and receiving upstream (US) signals from nodes downstream from the tap within the coaxial network; and one or more drop ports for receiving signal from and transmitting signals to customer premise equipment (CPE) in the coaxial network. The ideal tap may further include processing circuits for handling signals received and transmitted via the tap, with the one or more processing circuits being configured to meet particular predefined tap performance criteria, where the particular predefined tap performance criteria comprise one or more of high return loss, high port-to-port isolation, and high port-to-port gain.
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