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。

公开(公告)号：US12166555B2

公开(公告)日：2024-12-10

申请号：US17357769

申请日：2021-06-24

Applicant: Intel Corporation

Inventor： Jan Schreck ,  Nicholas Whinnett ,  Thushara Hewavithana ,  Yang-Seok Choi ,  Shilpa Talwar

IPC: H04W52/50 ,  H04B7/0456 ,  H04B7/06 ,  H04L5/00

Abstract: Various embodiments herein provide techniques for reducing computational complexity in multiple input multiple output (MIMO, e.g., massive MIMO (mMIMO)) communications, such as efficient decomposition of a channel covariance matrix. Embodiments enable accurate mMIMO channel estimation with relatively low computational complexity compared with prior techniques. Additionally, embodiments may provide efficient beamforming and/or spatial compression. Other embodiments may be described and claimed.

公开(公告)号：US11973618B2

公开(公告)日：2024-04-30

申请号：US17353838

申请日：2021-06-22

Applicant: Intel Corporation

Inventor： Thushara Hewavithana ,  Yuzhou Zhang ,  Xuebin Yang

IPC: H04L25/02 ,  H04W56/00 ,  H04W72/0446

CPC classification number: H04L25/0204 ,  H04L25/0232 ,  H04W56/004 ,  H04W72/0446

Abstract: This disclosure relates to apparatuses, systems, and methods for channel estimation, and in particular channel estimation for 5G New Radio systems. The channel estimation interpolates, prior to performing a de-spreading operation, a first combined channel estimation and a second combined channel estimation to provide from the first combined channel estimation one or more channel estimation values at indices associated with the second combined channel estimation and/or to provide from the second combined channel estimation one or more channel estimation values at indices associated with the first combined channel estimation.

公开(公告)号：US11546578B2

公开(公告)日：2023-01-03

申请号：US16976082

申请日：2019-05-06

Applicant: Intel Corporation

Inventor： Walter Bschor ,  Thushara Hewavithana ,  Boaz Kol

IPC: H04N17/04 ,  H04N21/61 ,  H04L5/14 ,  H04N21/442

Abstract: A method and apparatus for controlling a gain of an amplifier of a cable modem operating in a full duplex (FDX) mode. A cable modem includes an amplifier configured to amplify a received signal, a power meter configured to measure a power of the received signal on a plurality of channels, and a control unit configured to estimate a maximum expected power to receive on the plurality of channels based on the measured power and set a gain of the amplifier based on the maximum expected power. The cable modem is configured to operate in a full duplex mode. The channels include a full duplex upstream channel, a full duplex downstream channel, and a legacy downstream channel. The maximum expected power may be estimated via a sounding procedure. A power spectral density may be measured and the maximum expected power may be derived from the power spectral density.

公开(公告)号：US20220416868A1

公开(公告)日：2022-12-29

申请号：US17357769

申请日：2021-06-24

Applicant: Intel Corporation

Inventor： Jan Schreck ,  Nicholas Whinnett ,  Thushara Hewavithana ,  Yang-Seok Choi ,  Shilpa Talwar

IPC: H04B7/06 ,  H04B7/0456 ,  H04L5/00

Abstract: Various embodiments herein provide techniques for reducing computational complexity in multiple input multiple output (MIMO, e.g., massive MIMO (mMIMO)) communications, such as efficient decomposition of a channel covariance matrix. Embodiments enable accurate mMIMO channel estimation with relatively low computational complexity compared with prior techniques. Additionally, embodiments may provide efficient beamforming and/or spatial compression. Other embodiments may be described and claimed.

公开(公告)号：US20220214423A1

公开(公告)日：2022-07-07

申请号：US17392785

申请日：2021-08-03

Applicant: INTEL CORPORATION

Inventor： Ofer Markish ,  Ophir Shabtay ,  Thushara Hewavithana ,  Arnaud Amadjikpe ,  Shengbo Xu

IPC: G01S7/35 ,  H01Q1/32 ,  H01Q21/22

Abstract: Some demonstrative aspects include radar apparatuses, devices, systems and methods. In one example, an apparatus may include a plurality of Transmit (Tx) antennas to transmit radar Tx signals, and a plurality of Receive (Rx) antennas to receive radar Rx signals. For example, the radar Rx signals may be based on the radar Tx signals. The apparatus may be implemented, for example, as part of a radar device, for example, as part of a vehicle including the radar device. In other aspects, the apparatus may include any other additional or alternative elements and/or may be implemented as part of any other device.

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.

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.

公开(公告)号：US20180287842A1

公开(公告)日：2018-10-04

申请号：US15882156

申请日：2018-01-29

Applicant: Intel Corporation

Inventor： Bernard Arambepola ,  Parveen K. Shukla ,  Thushara Hewavithana ,  Sahan S. Gamage

IPC: H04L27/26 ,  G06F7/76 ,  H04L1/00 ,  H03M13/27 ,  G06F12/00

CPC classification number: H04L27/2627 ,  G06F7/768 ,  G06F12/00 ,  H03M13/271 ,  H04L1/0071 ,  H04L27/2628 ,  H04L27/263 ,  H04L27/2634 ,  H05K999/99

Abstract: The disclosure generally relates to a method and apparatus for frequency interleaving. Specifically, an embodiment of the disclosure relates to a communication system having one or more antennas, a radio, a memory circuit, and a processor circuit. The antennas can be used to communicate signals or to comply with different transmission protocols. The radio can be configured to send and receive radio signals. The memory can communicate with the processor circuit and contain instructions for the processor circuit to write data carriers along a plurality of rows and columns of a 2-D store in bit-reversed order and read the columns of 2-D store.

公开(公告)号：US09634795B2

公开(公告)日：2017-04-25

申请号：US14197208

申请日：2014-03-04

Applicant: Intel Corporation

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

IPC: H04W4/00 ,  H04L1/00 ,  H04L5/00 ,  H04L27/00 ,  H04L27/26

CPC classification number: H04L1/004 ,  H04L1/0041 ,  H04L5/0046 ,  H04L27/0008 ,  H04L27/2634

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.