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    Computationally efficient algorithm for mitigating phase noise in OFDM receivers
    12.
    发明授权
    Computationally efficient algorithm for mitigating phase noise in OFDM receivers 有权

    公开(公告)号：US10171272B2

    公开(公告)日：2019-01-01

    申请号：US15639196

    申请日：2017-06-30

    Applicant: Intel Corporation

    Inventor： Thushara Hewavithana ,  Bernard Arambepola

    IPC: H04L25/02 ,  H04L25/03 ,  H04L27/26

    Abstract: An inter-carrier interference (ICI) mitigation circuit associated with an orthogonal frequency division multiplexing (OFDM) receiver is disclosed. The ICI mitigation circuit comprises an ICI cancellation circuit configured to receive an OFDM symbol associated with an OFDM signal and determine an ICI associated with one or more OFDM subcarriers within the OFDM symbol. The ICI cancellation circuit is further configured to cancel the ICI from the one or more OFDM subcarriers associated with the OFDM symbol, in order to generate a desired OFDM symbol. In some embodiments, the ICI is determined and cancelled at the ICI cancellation circuit, in accordance with a predetermined ICI mitigation algorithm.

    Techniques for managing interference in multiple channel communications system
    14.
    发明授权
    Techniques for managing interference in multiple channel communications system 有权
    用于管理多通道通信系统中的干扰的技术

    公开(公告)号：US08938041B2

    公开(公告)日：2015-01-20

    申请号：US13718812

    申请日：2012-12-18

    Applicant: Intel Corporation

    Inventor： Bernard Arambepola ,  Thushara Hewavithana

    IPC: H04B1/10

    CPC classification number: H04L27/0008 ,  H04L5/0007 ,  H04L5/0028 ,  H04L5/0062 ,  H04L27/0006 ,  H04L27/2626 ,  H04L27/362

    Abstract: An apparatus may include a processor circuit, and a dynamic filter adjustment component for execution on the processor. The dynamic filter adjustment component may identify in a wideband communications signal a set of one or more interferer frequencies for one or more respective interferer channels of a set of communications channels to be filtered, select a kernel filter comprising a low pass filter having a channel width corresponding to a channel of the one or more interferer channels, and generate a co-channel interference (CCI) filter to stop the one or more interferer channels by inverting the kernel filter. Other embodiments are described and claimed.

    Abstract translation: 设备可以包括处理器电路和用于在处理器上执行的动态滤波器调整组件。 动态滤波器调整组件可以在宽带通信信号中识别要被滤波的一组通信信道中的一个或多个相应干扰信道的一个或多个干扰信号频率的集合，选择包括低通滤波器的核心滤波器，该低通滤波器具有信道宽度 对应于一个或多个干扰信道的信道，并且产生同信道干扰（CCI）滤波器，以通过反转内核滤波器来停止一个或多个干扰信道。 描述和要求保护其他实施例。

    Methods and systems to mitigate impulse interference
    15.
    发明授权
    Methods and systems to mitigate impulse interference 有权
    减少冲击干扰的方法和系统

    公开(公告)号：US08929471B2

    公开(公告)日：2015-01-06

    申请号：US13661817

    申请日：2012-10-26

    Applicant: Intel Corporation

    Inventor： Thushara Hewavithana ,  Bernard Arambepola ,  Sahan Gamage

    IPC: H04L5/12 ,  H04L23/02

    CPC classification number: H04L27/38 ,  H04L25/067 ,  H04L27/2649

    Abstract: Methods and systems to mitigate impulse interference in an OFDM QAM signal. A per-symbol noise measure, or quality measure (QM) is computed for a symbol k as a MSE of distances between carriers in the symbol and points of corresponding QAM constellations. MSE(k) is averaged over multiple symbols to compute a background signal QM, AVG_MSE(k). If MSE(k) exceeds AVG_MSE(k) by a moderate amount, symbol k may be moderately affected by impulse interference, and per-carrier SNR estimates are downgraded for all data carriers in symbol k, prior to LLR computation. SNR downgrading may be linear or step-wise based on an extent to which MSE(k) exceeds AVG_MSE(k). If MSE(k) exceeds AVG_MSE(k) by a significant amount, symbol k may be significantly affected by impulse interference, and LLRs may be set to indicate that all data carriers are erased in symbol k.

    Abstract translation: 减少OFDM QAM信号脉冲干扰的方法和系统。 针对符号k计算每符号噪声测量或质量测量（QM），作为符号中的载波与相应QAM星座的点之间的距离的MSE。 MSE（k）在多个符号之间进行平均以计算背景信号QM，AVG_MSE（k）。 如果MSE（k）超过AVG_MSE（k）中等量，则符号k可能受脉冲干扰的适度影响，并且在LLR计算之前，符号k中的所有数据载波的每载波SNR估计被降级。 基于MSE（k）超过AVG_MSE（k）的程度，SNR降级可以是线性的或逐步的。 如果MSE（k）超过AVG_MSE（k）大量，则符号k可能受脉冲干扰的显着影响，并且可以将LLR设置为指示所有数据载体在符号k中被擦除。

    Signaling method to enable full duplex in next generation Docsis cable modem standard
    16.
    发明授权
    Signaling method to enable full duplex in next generation Docsis cable modem standard 有权

    公开(公告)号：US11411709B2

    公开(公告)日：2022-08-09

    申请号：US16866580

    申请日：2020-05-05

    Applicant: Intel Corporation

    Inventor： David Barr ,  Bernard Arambepola

    IPC: H04L5/14 ,  H04B3/02 ,  H04L29/06 ,  H04B3/32 ,  H04L12/28 ,  H04L65/1101

    Abstract: A head-end equipment associated with a communication system configured to interface with an interference group (IG) composed of two or more modems is disclosed. The head-end equipment comprises a memory configured to store a plurality of instructions; and one or more processors configured to retrieve the plurality of instructions from the memory. In some embodiments, the one or more processors, upon execution of the plurality of instructions from the memory, is configured to generate an advanced warning signal to be provided to one or more modems associated with the IG. In some embodiments, the advanced warning signal comprises an information that a select modem, different from the one or more modems, in the IG will be initiating an upstream communication in a select frequency band, as well as information on a start time and a duration of the upstream communication.

    CONFIGURABLE CONSTELLATION MAPPING TO CONTROL SPECTRAL EFFICIENCY VERSUS SIGNAL-TO-NOISE RATIO
    17.
    发明申请
    CONFIGURABLE CONSTELLATION MAPPING TO CONTROL SPECTRAL EFFICIENCY VERSUS SIGNAL-TO-NOISE RATIO 有权

    公开(公告)号：US20220021475A1

    公开(公告)日：2022-01-20

    申请号：US17383698

    申请日：2021-07-23

    Applicant: Intel Corporation

    Inventor： Bernard Arambepola ,  Noam Tal ,  Sahan S. Gamage ,  Thushara Hewavithana ,  Shaul Shulman

    IPC: H04L1/00 ,  H04L5/00 ,  H04L27/00 ,  H04L27/26

    Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.

    INTERFERENCE MITIGATION
    18.
    发明申请
    INTERFERENCE MITIGATION 有权

    公开(公告)号：US20210184900A1

    公开(公告)日：2021-06-17

    申请号：US16834032

    申请日：2020-03-30

    Applicant: Intel Corporation

    Inventor： Bernard Arambepola ,  Thushara Hewavithana

    IPC: H04L25/08 ,  H04B1/10 ,  H04L5/00 ,  H04L7/00

    Abstract: Symbols are received on a downstream channel. A value of a channel synchronization parameter is determined based on the received symbols. An interference event on the downstream channel is detected. In response to detecting the interference event: an output signal is determined based on at least one cached value of the channel synchronization parameter, the at least one cached value being determined based on symbols received prior to and offset from said detecting of the interference event.

    Signaling method to enable full duplex in next generation docsis cable modem standard
    19.
    发明授权
    Signaling method to enable full duplex in next generation docsis cable modem standard 有权

    公开(公告)号：US10855433B2

    公开(公告)日：2020-12-01

    申请号：US15908360

    申请日：2018-02-28

    Applicant: Intel Corporation

    Inventor： David Barr ,  Bernard Arambepola

    IPC: H04L5/14 ,  H04L12/28 ,  H04L29/06 ,  H04B3/02 ,  H04B3/32

    Abstract: A head-end equipment associated with a communication system configured to interface with an interference group (IG) composed of two or more modems is disclosed. The head-end equipment comprises a memory configured to store a plurality of instructions; and one or more processors configured to retrieve the plurality of instructions from the memory. In some embodiments, the one or more processors, upon execution of the plurality of instructions from the memory, is configured to generate an advanced warning signal to be provided to one or more modems associated with the IG. In some embodiments, the advanced warning signal comprises an information that a select modem, different from the one or more modems, in the IG will be initiating an upstream communication in a select frequency band, as well as information on a start time and a duration of the upstream communication.

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