公开(公告)号：US20180102777A1

公开(公告)日：2018-04-12

申请号：US15707788

申请日：2017-09-18

Applicant: MaxLinear, Inc.

Inventor： Sridhar Ramesh ,  Subramanian Anantharaman ,  Harish Maller

IPC: H03L7/00 ,  H03L1/00 ,  H03B5/18

CPC classification number: H03L7/00 ,  H03B5/1864 ,  H03L1/00

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.

公开(公告)号：US09912402B2

公开(公告)日：2018-03-06

申请号：US14245658

申请日：2014-04-04

Applicant: MaxLinear, Inc.

Inventor： Glenn Chang ,  Curtis Ling ,  Sridhar Ramesh

IPC: H04B7/185 ,  H04B7/00

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.

公开(公告)号：US20180048381A1

公开(公告)日：2018-02-15

申请号：US15692459

申请日：2017-08-31

Applicant: MaxLinear, Inc.

Inventor： Raja Pullela ,  Glenn Chang ,  Sridhar Ramesh

IPC: H04B7/185 ,  H04L7/00 ,  H04L7/033

CPC classification number: H04B7/18513 ,  H04L7/0054 ,  H04L7/0331

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.

公开(公告)号：US20170311263A1

公开(公告)日：2017-10-26

申请号：US15464912

申请日：2017-03-21

Applicant: Maxlinear, Inc.

Inventor： James Qiu ,  Sridhar Ramesh ,  Sheng Ye ,  Curtis Ling

IPC: H04W52/02 ,  H04L27/06 ,  H04L1/20 ,  H04B17/00 ,  H04B1/10 ,  H04W88/02 ,  H03G3/20

CPC classification number: H04W52/0245 ,  H03G3/20 ,  H04B1/109 ,  H04B17/00 ,  H04L1/20 ,  H04L27/06 ,  H04W88/02 ,  Y02D70/00 ,  Y02D70/40

Abstract: A communication receiver which applies signal processing for quantitatively estimating receive signal factors such as communication channel quality, signal characteristics, and overall system received bit error rate (BER) or packet error rate (PER) and which applies a general algorithm for mapping these estimated factors to control receiver performance and minimize power consumption.

公开(公告)号：US09768787B2

公开(公告)日：2017-09-19

申请号：US15285122

申请日：2016-10-04

Applicant: MaxLinear, Inc.

Inventor： Sridhar Ramesh ,  Subramanian Anantharaman ,  Harish Maller

IPC: H03L7/00 ,  H03B5/18 ,  H03L1/00

CPC classification number: H03L7/00 ,  H03B5/1864 ,  H03L1/00

Abstract: Systems and methods are provided for detection and compensation of dielectric resonator oscillator frequency drift. DRO frequency drift detection and compensation may comprise, for a received input signal, detecting one or more channels in the input signal, determine frequency offset for each of the detected channels; determining determine dielectric resonator oscillator (DRO) frequency drift based on combining frequency offsets of the detected channels, and determining, based on the DRO frequency drift, one or more adjustments for compensating for the DRO frequency drift. The DRO frequency drift may be determined based on analysis of an intermediate signal generated during processing of the input signal.

公开(公告)号：US20170230221A1

公开(公告)日：2017-08-10

申请号：US15425115

申请日：2017-02-06

Applicant: MaxLinear, Inc.

Inventor： Sridhar Ramesh

IPC: H04L27/26

CPC classification number: H04L27/2621 ,  H03D1/06 ,  H03D3/002 ,  H04B1/1027 ,  H04B15/00 ,  H04L27/2601

Abstract: Systems and methods are provided for peak to average power ratio (PAPR) reduction in multichannel digital front-ends (DFEs). A transmitter may be configured to reduce PAPR during multichannel transmission, with the reducing comprising: generating a plurality of frequency-domain symbols, each of which corresponding to a particular one of a plurality of subcarriers; assigning the subcarriers to a plurality of channels, wherein a number of channels is less than a number of subcarriers; and generating a plurality of time-domain signals corresponding to the channels. An adjustment to reduce PAPR may be applied to at least one of the time-domain signals, with the adjustment being based on symbols boundaries. The adjustment may comprise sign inversion. Adjusted and unadjusted waveforms may be generated for two or more of the time-domain signals; and selection may be made between generated adjusted waveforms based on particular criteria. The criteria may comprise lowest peak.

公开(公告)号：US09635310B2

公开(公告)日：2017-04-25

申请号：US14270037

申请日：2014-05-05

Applicant: MaxLinear, Inc.

Inventor： Glenn Chang ,  Raja Pullela ,  Sridhar Ramesh

IPC: H04B7/08 ,  H04N7/10 ,  H04N7/20 ,  H04N21/436 ,  H04H40/18 ,  H04B1/00 ,  H04B1/10

CPC classification number: H04N7/20 ,  H04B1/0075 ,  H04B1/1027 ,  H04B1/1036 ,  H04B2001/1063 ,  H04H40/18 ,  H04N7/106 ,  H04N21/436

Abstract: Methods and systems are provided for band translation with protection. A signal processing circuitry (chip) may be configured to handle a plurality of signals, comprising at least a first signal corresponding to internal communication within an in-premises network and at least a second signal originating from a source external to the in-premises network; and to process on-chip the plurality of input signals, to generate one or more output signals. In this regard, at least one output signal may comprise components corresponding to the first signal and the second signal; and the processing may be configured to mitigate on-chip, during generating of the one or more outputs, at least one effect of including in the at least one output signal a first component corresponding to one of the first signal and the second signal on a second component corresponding to the other one of the first signal and the second signal.

公开(公告)号：US09609599B2

公开(公告)日：2017-03-28

申请号：US14450343

申请日：2014-08-04

Applicant: MaxLinear, Inc.

Inventor： James Qiu ,  Sridhar Ramesh ,  Sheng Ye ,  Curtis Ling

IPC: H04W52/02 ,  H04B1/10 ,  H04L1/20 ,  H03G3/20 ,  H04W88/02

CPC classification number: H04W52/0245 ,  H03G3/20 ,  H04B1/109 ,  H04B17/00 ,  H04L1/20 ,  H04L27/06 ,  H04W88/02 ,  Y02D70/00 ,  Y02D70/40

Abstract: A communication receiver which applies signal processing for quantitatively estimating receive signal factors such as communication channel quality, signal characteristics, and overall system received bit error rate (BER) or packet error rate (PER) and which applies a general algorithm for mapping these estimated factors to control receiver performance and minimize power consumption.

公开(公告)号：US09559983B1

公开(公告)日：2017-01-31

申请号：US13851563

申请日：2013-03-27

Applicant: MaxLinear, Inc.

Inventor： Sridhar Ramesh ,  Timothy Leo Gallagher ,  Curtis Ling

IPC: H04L12/931

CPC classification number: H04L41/12 ,  H04L12/2801 ,  H04L12/4633 ,  H04L43/0811

Abstract: A network device may comprise a first connector for connecting to an external network in which upstream data over cable service interface specification (DOCSIS) signals are communicated using a first frequency band and downstream cable and/or DOCSIS signals are communicated using a second frequency band. The device may also comprise a second connector for connecting to an on-premises network, as well as circuitry residing in a signal path between the first connector and the second connector. The circuitry may be operable to permit the downstream cable and/or DOCSIS signals to pass from the first connector to the second connector, and to block the upstream DOCSIS signals from passing from the first connector to the second connector. The circuitry may be operable to transmit, via the second connector, non-DOCSIS signals into the on-premises network using the first frequency band.

Abstract translation: 网络设备可以包括用于连接到外部网络的第一连接器，其中使用第一频带传送电缆服务接口规范（DOCSIS）信号的上行数据，并且使用第二频带来传送下行电缆和/或DOCSIS信号。 该设备还可以包括用于连接到内部部署网络的第二连接器以及驻留在第一连接器和第二连接器之间的信号路径中的电路。 该电路可操作以允许下游电缆和/或DOCSIS信号从第一连接器传递到第二连接器，并阻止上游DOCSIS信号从第一连接器传递到第二连接器。 该电路可以用于经由第二连接器使用第一频带将非DOCSIS信号传输到本地网络。

公开(公告)号：US09549222B2

公开(公告)日：2017-01-17

申请号：US14719397

申请日：2015-05-22

Applicant: MaxLinear, Inc.

Inventor： Curtis Ling ,  Sridhar Ramesh ,  Timothy Gallagher

IPC: H04N21/6338 ,  H04N21/61 ,  H04H20/78 ,  H04H60/97 ,  H04N21/647 ,  H04H60/32 ,  H04B1/10 ,  H04L1/20 ,  H04B15/00 ,  H03G3/34

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。