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公开(公告)号：US20140026176A1
公开(公告)日：2014-01-23
申请号：US13948417
申请日：2013-07-23
Applicant: MaxLinear, Inc.
Inventor： Curtis Ling , Sridhar Ramesh , Timothy Gallagher
IPC: H04N21/61
CPC classification number: H04N21/6338 , H04H20/78 , H04H60/32 , H04H60/97 , H04N21/6118 , H04N21/6156 , H04N21/6168 , H04N21/64761 , H04N21/64769
Abstract: A coupling device for use in a hybrid fiber coaxial (HFC) network may be configured to disable an upstream path through it when there is only noise incident on the upstream path, and enable the upstream path through it when a desired transmission from a cable modem downstream of the coupling device is incident on the upstream path. The coupling device may be a trunk amplifier, a distribution amplifier, a splitter, or the like. The coupling device may comprise a single upstream interface coupled to a plurality of downstream interfaces. The enabling and/or disabling may be in response to a signal strength indicated by the SSI being below a threshold and/or in response to one or more control messages indicating whether any downstream cable modem is, or will be, transmitting.
Abstract translation: 用于混合光纤同轴（HFC）网络的耦合装置可以被配置为当仅有入射在上游路径上的噪声时禁止通过它的上游路径，并且当来自电缆调制解调器的所需传输时使得能够通过它的上行路径 耦合装置的下游入射在上游路径上。 耦合装置可以是干线放大器，分配放大器，分路器等。 耦合设备可以包括耦合到多个下游接口的单个上游接口。 启用和/或禁用可以响应于由SSI指示的信号强度低于阈值和/或响应于指示是否或将要发送的任何下游电缆调制解调器的一个或多个控制消息。
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公开(公告)号：US11902187B2
公开(公告)日：2024-02-13
申请号：US17664840
申请日：2022-05-24
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：US20230327922A1
公开(公告)日：2023-10-12
申请号：US18299647
申请日：2023-04-12
Applicant: MAXLINEAR, INC.
Inventor： Sridhar Ramesh , Ioannis Spyropoulos
IPC: H04L25/03
CPC classification number: H04L25/03057
Abstract: According to an aspect of an embodiment, a decision feedback equalizer (DFE) may be configured for noise suppression slicing. The DFE may be configured to receive, from a feedforward equalizer, an output signal having a received (Rx) symbol. The DFE may be configured to initialize noise suppression slicer (NSS) parameters including one or more initial NSS coefficients and one or more initial slicer deferred decision (SDD) threshold offsets. The DFE may be configured to determine one or more updated NSS coefficients. The DFE may be configured to determine one or more updated SDD threshold offsets. The DFE may be configured to update the NSS parameters of a processing register based on the one or more updated NSS coefficients and the one or more updated SDD threshold offsets.
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114.发明授权公开(公告)号：US10560251B2
公开(公告)日：2020-02-11
申请号：US14012772
申请日：2013-08-28
Applicant: MaxLinear, Inc.
Inventor： Curtis Ling , Timothy Gallagher , Sridhar Ramesh
IPC: H04L7/00
Abstract: A network device may comprise one or more circuits including a clock signal generator, an ADC, and a processor. The ADC may digitize a received signal across a range of frequencies that encompasses a first band of frequencies used for a first network and a second band of frequencies used for a second network. A sampling frequency of the ADC may be determined by a frequency of a clock signal output by the clock signal generator. The processor may determine whether the first network is active and whether the second network is active. The processor may configure the clock generator such that, when both of the first network and the second network are active, the clock signal is set to a first frequency, and when the first network is active and the second network is inactive, the clock signal is set to a second frequency.
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公开(公告)号：US20200036384A1
公开(公告)日：2020-01-30
申请号：US16589600
申请日：2019-10-01
Applicant: MaxLinear, Inc.
Inventor： Sridhar Ramesh , Subramanian Anantharaman , Harish Maller
Abstract: Systems and methods are provided for detection and compensation of dielectric resonator oscillator frequency drift. DRO frequency drift detection and compensation may be applied in a system, such as an outdoor unit, during handling of received signals. The DRO frequency drift detection and compensation may include, for each input signal, obtaining DRO frequency drift related information, related to the input signal; determining, based on the obtained DRO frequency drift related information, one or more adjustments applicable to processing of the input signal and/or the generation of the output signal using the at least portion of the input signal; and applying the one or more adjustments. The DRO frequency drift detection and compensation may be applied continually, occasionally, and/or periodically.
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Patent Agency Ranking
公开(公告)号：US10404503B2
公开(公告)日：2019-09-03
申请号：US15621025
申请日：2017-06-13
Applicant: Maxlinear, Inc.
Inventor： Paul Chominski , Sridhar Ramesh
IPC: H04L27/00 , H04L12/24 , H04L12/28 , H04L12/46 , H04L29/12 , H04M11/06 , H04N21/61 , H04Q11/04 , H04N21/426
Abstract: Aspects of methods and systems for frequency multiplexing suitable for Data Over Cable Service Interface Specification (DOCSIS) are provided. A system for multiplexing signals according to frequency comprises a DOCSIS port interface, an upstream interface, a downstream interface, and a circulator subsystem. The DOCSIS port interface comprises a plurality of channel filters. The upstream interface is operably coupled to a first channel filter of the plurality of channel filters, and the downstream interface is operably coupled to a second channel filter of the plurality of channel filters. The circulator subsystem is able to direct a first signal from the upstream interface to the DOCSIS port interface and is able to direct a second signal from the DOCSIS port interface to the downstream interface.
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公开(公告)号：US10326414B2
公开(公告)日：2019-06-18
申请号：US15700732
申请日：2017-09-11
Applicant: MaxLinear, Inc.
Inventor： Rahul Bhatia , Timothy Gallagher , Raja Pullela , Sridhar Ramesh
Abstract: Systems and methods are provided for dynamically biasing power amplifiers. A power amplifier (PA) that amplifies an input signal may be controlled based on processing of the input signal. The controlling may include adjusting biasing applied to the power amplifier (PA). The processing of the input signal may include applying clipping to the input signal and determining one or more parameters of the input signal. The biasing applied to the power amplifier (PA) may be adjusted based on the one or more parameters of the input signal. The clipping may be configured such that signals applied to positive and negative sides of the power amplifier (PA) are not differential.
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公开(公告)号：US10256898B2
公开(公告)日：2019-04-09
申请号：US15692459
申请日：2017-08-31
Applicant: MaxLinear, Inc.
Inventor： Raja Pullela , Glenn Chang , Sridhar Ramesh
Abstract: Methods and systems are provided for guard band detection and frequency offset detection. For each of a plurality of downconverted signals, frequency related information associated with one or more corresponding circuits used in obtaining the plurality of downconverted signals may be determined; and based on the determined frequency related information, one or both of a band stacking operation and a channel stacking operation may be performed. During the band stacking operation, frequency bands are not stacked on each other or stacked frequency bands do not overlap. During the channel stacking operation, channels are not stacked on each other or stacked channels do not overlap. The frequency related information may be determined based on predefined frequency related parameters associated with the corresponding circuits. Frequency corrections may be performed, on output signals corresponding to the band stacking operation and/or the channel stacking operation, based on the frequency related information.
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公开(公告)号：US10135682B2
公开(公告)日：2018-11-20
申请号：US15866106
申请日：2018-01-09
Applicant: Maxlinear, Inc.
Inventor： Curtis Ling , Sridhar Ramesh , Timothy Gallagher
Abstract: A cable modem termination system (CMTS) may determine, for a plurality of cable modems served by the CMTS, a corresponding plurality of SNR-related metrics. The CMTS may assigning the modems among a plurality of service groups based on the SNR-related metrics. For any one of the modems, the CMTS may configure physical layer communication parameters to be used by the one of the modems based on a SNR-related metric of a service group to which the one of the modems is assigned. The physical layer communication parameters may include one or more of: transmit power, receive sensitivity, timeslot duration, modulation type, modulation order, forward error correction (FEC) type, and FEC code rate. The CMTS and the modems may communicate using orthogonal frequency division multiplexing (OFDM) over a plurality of subcarriers, and the physical layer communication parameters may be determined on a per-subcarrier basis.
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公开(公告)号：US20180191427A1
公开(公告)日：2018-07-05
申请号：US15906585
申请日：2018-02-27
Applicant: Maxlinear, Inc.
Inventor： Glenn Chang , Curtis Ling , Sridhar Ramesh
IPC: H04B7/185
CPC classification number: H04B7/18523
Abstract: A direct broadcast satellite (DBS) reception assembly may receive a desired satellite signal and process the desired satellite signal for output to a gateway. The DBS assembly may also receive one or more undesired satellite signals and determine a performance metric of the one or more undesired satellite signals. The elevation angle of the assembly and/or the azimuth angle of the assembly may be adjusted based on the performance metric(s) of the undesired satellite signal(s). The adjusting of the elevation angle and/or the azimuth angle may comprise electronically steering a directivity of a receive radiation pattern of the DBS reception assembly and/or mechanically steering one or more components of the assembly via motors, servos, actuators, MEMS, and/or the like. The performance metric may be received signal strength of the undesired signals, received signal strength of the desired signal, SNR of the desired signal, and/or SNR of the undesired signals.
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