公开(公告)号：US11665040B2

公开(公告)日：2023-05-30

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

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

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：US11616664B2

公开(公告)日：2023-03-28

申请号：US17123193

申请日：2020-12-16

Applicant: Intel Corporation

Inventor： Thushara Hewavithana ,  Yuwen Liu ,  Xuebin Yang ,  Chenxi Yue ,  Yuzhou Zhang

IPC: H04L25/02

Abstract: Various strategies and devices for same are disclosed to correct for/mitigate frequency offset (such as due to differing accuracies between an oscillator of a transmitting device and an oscillator of a receiving device) and Doppler shift (such as due to a changing relative position between a receiving device and a transmitting device). These strategies may be employed in a MIMO setting, such as, e.g. a stationary base station and a plurality of terminal devices (e.g. user devices, mobile stations, etc.), in which the transmissions for each terminal device may be associated with a different frequency offset and a different Doppler shift.

公开(公告)号：US20220214425A1

公开(公告)日：2022-07-07

申请号：US17392767

申请日：2021-08-03

Applicant: INTEL CORPORATION

Inventor： Ilia Yoffe ,  Ophir Shabtay ,  Chulong Chen ,  Thushara Hewavithana ,  Moshe Teplitsky ,  Lior Maor ,  Alon Cohen

IPC: G01S7/41 ,  G01S13/931 ,  G01S13/58 ,  G01S13/95 ,  G01S7/35

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, a plurality of Receive (Rx) antennas to receive radar Rx signals based on the Tx signals, and a processor to generate radar information based on the radar Rx 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：US11075713B2

公开(公告)日：2021-07-27

申请号：US16714640

申请日：2019-12-13

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

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：US10243681B2

公开(公告)日：2019-03-26

申请号：US15717285

申请日：2017-09-27

Applicant: Intel Corporation

Inventor： Nathan Goichberg ,  Shaul Shulman ,  Thushara Hewavithana

IPC: H04B1/10 ,  H04J3/06 ,  H04L5/14 ,  H04L25/03

Abstract: Synchronizing methods and architectures for cable modems to transmit and receive Full Duplex (FDX) resource block allocations (RBAs) using filter switching and coordinated updating of equalization coefficients. A cable modem including a block of switchable filters, an analog front end (AFE) and a PHY/MAC System on a Chip (SoC) tuner to, at least in part, provide signals to switch the switchable filters in accordance with the RBA changes and synchronize updating tuner equalizations to match filter switching in a coordinated manner by marking received data at the AFE.

公开(公告)号：US20180287660A1

公开(公告)日：2018-10-04

申请号：US15475448

申请日：2017-03-31

Applicant: Intel Corporation

Inventor： Bernard Arambepola ,  Thushara Hewavithana ,  Noam Tal ,  Shaul Shulman

IPC: H04B3/46 ,  H04B17/345

Abstract: A cable modem system for discovering interference groups (IGs) includes an infrastructure and a cable modem termination system (CMTS). The infrastructure is for transferring data. The CMTS is configured to initiate generation of test signals by a set of cable modems (CMs), obtain a set of test measurements for the set of CMs, discover interference groups (IGs) of the set of CMs based on the obtained set of test measurements and assign a plurality of upstream and downstream channels for the set of CMs that use orthogonal frequency division multiplexing (OFDM) based on the discovered IGs.

公开(公告)号：US09954708B2

公开(公告)日：2018-04-24

申请号：US14081586

申请日：2013-11-15

Applicant: Intel Corporation

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

IPC: H04L27/00 ,  H04B7/02 ,  H04L27/26 ,  G06F12/00 ,  G06F7/76

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

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：US20180048417A1

公开(公告)日：2018-02-15

申请号：US15790807

申请日：2017-10-23

Applicant: Intel Corporation

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

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

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.

公开(公告)号：US09288094B2

公开(公告)日：2016-03-15

申请号：US14133123

申请日：2013-12-18

Applicant: Intel Corporation

Inventor： Bernard Arambepola ,  Parveen K. Shukla ,  Thushara Hewavithana

IPC: H04L27/26 ,  H04L25/03

CPC classification number: H04L27/2646 ,  H04L5/0007 ,  H04L25/0218 ,  H04L25/022 ,  H04L25/0232 ,  H04L25/03343 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2647 ,  H04L27/2665 ,  H04L27/2678

Abstract: One embodiment provides an apparatus. The apparatus includes an optimization module configured to determine a guard interval remainder based, at least in part on a comparison of an allowable microreflection interference level and an actual microreflection interference level; and a windowing module configured to window an OFDM (orthogonal frequency division multiplexed) symbol utilizing the guard interval remainder. The apparatus may further include a channel estimator module configured to determine a predicted channel frequency response based, at least in part, on a probing symbol; and a pre-equalizer module configured to pre-equalize the OFDM symbol based, at least in part, on the predicted channel frequency response.

Abstract translation: 一个实施例提供了一种装置。 该装置包括：优化模块，其被配置为至少部分地基于允许的微反射干扰电平与实际微反射干扰电平的比较来确定保护间隔余数; 以及窗口模块，被配置为利用所述保护间隔余数来对OFDM（正交频分复用）符号进行窗口化。 该装置还可以包括信道估计器模块，其被配置为至少部分地基于探测符号来确定预测的信道频率响应; 以及预均衡器模块，其被配置为至少部分地基于所预测的信道频率响应来预均衡所述OFDM符号。

公开(公告)号：US20140219324A1

公开(公告)日：2014-08-07

申请号：US13997706

申请日：2012-03-15

Applicant: INTEL CORPORATION

Inventor： Bernard Arambepola ,  Thushara Hewavithana

IPC: H04L27/22 ,  H04B17/00 ,  H04L27/01

CPC classification number: H04L27/22 ,  H04L25/03159 ,  H04L27/01 ,  H04L27/26 ,  H04L27/2665 ,  H04L27/2672 ,  H04L27/2675 ,  H04L27/2679 ,  H04L27/2695

Abstract: A system according to one embodiment includes a demodulator configured to receive an OFDM modulated signal over a channel, the signal including a sequence of symbols, each of the symbols including one or more pilot carriers and one or more data carriers; a time filtering and interpolation circuit coupled to the demodulator, the time filtering and interpolation circuit configured to estimate the frequency response of the channel based on time filtering and interpolation of the pilot carriers; a phase slope correction circuit configured to apply each of a plurality of phase slope corrections to the frequency response and to the data carriers; a frequency filtering and interpolation circuit configured to calculate frequency response estimates of the channel at data carrier frequencies based on frequency filtering and interpolation of the phase slope corrected frequency response; an equalization circuit configured to equalize the phase slope corrected data carriers based on the calculated frequency response estimates; an error calculation circuit configure to calculate the mean square error between the equalized data carriers and a nearest QAM constellation point; and an iterative phase slope optimization circuit configured to select the phase slope correction associated with the minimum of the mean square errors, wherein the selected phase slope resolves the cyclic ambiguity.

Abstract translation: 根据一个实施例的系统包括：解调器，被配置为通过信道接收OFDM调制信号，所述信号包括符号序列，每个符号包括一个或多个导频载波和一个或多个数据载波; 耦合到解调器的时间滤波和内插电路，所述时间滤波和内插电路被配置为基于导频载波的时间滤波和内插来估计信道的频率响应; 相位斜率校正电路，被配置为对频率响应和数据载波施加多个相位斜率校正中的每一个; 频率滤波和内插电路，被配置为基于频率滤波和相位斜率校正频率响应的内插来计算数据载波频率处的信道的频率响应估计; 均衡电路，被配置为基于所计算的频率响应估计来均衡相位斜率校正数据载波; 误差计算电路，用于计算均衡数据载波与最近的QAM星座点之间的均方误差; 以及迭代相位斜率优化电路，被配置为选择与所述均方误差的最小值相关联的相位斜率校正，其中所选择的相位斜率解决所述循环模糊度。